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WAN Technologies Final Exam CH 1-9

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WAN Technologies CH 1-9 Final Exam
Anthony Schulmeister
Test por Anthony Schulmeister, actualizado hace más de 1 año
Anthony Schulmeister
Creado por Anthony Schulmeister hace más de 8 años
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Resumen del Recurso

Pregunta 1

Pregunta
Refer to the exhibit. Which type of ISP connectivity to the service provider edge is being used by company A?
Image:
8c054d2e-4e69-4444-9aca-699ffcef609e (image/jpeg)
Respuesta
  • multihomed
  • dual-multihomed
  • dual-homed
  • single-homed

Pregunta 2

Pregunta
Refer to the exhibit. Which Cisco Enterprise Architecture module is shown?
Image:
c52dd08c-ea40-453d-8a56-745758c909f7 (image/png)
Respuesta
  • remote
  • campus infrastructure
  • service provider edge
  • enterprise campus
  • enterprise edge

Pregunta 3

Pregunta
The network design for a college with users at five sites is being developed. Where in the campus network architecture would servers used by all users be located?
Respuesta
  • data center
  • services
  • enterprise edge
  • access-distribution

Pregunta 4

Pregunta
Which network architecture functions through a combination of technologies that include wired, wireless, security, and more?
Respuesta
  • Cisco Borderless
  • Cisco Enterprise Edge
  • Cisco Enterprise Branch
  • Cisco Enterprise Campus

Pregunta 5

Pregunta
Which network module is the fundamental component of a campus design?
Respuesta
  • services module
  • enterprise edge
  • data center
  • access-distribution module

Pregunta 6

Pregunta
What is one advantage to designing networks in building block fashion for large companies?
Respuesta
  • increased network access time
  • failure isolation
  • redundancy
  • mobility

Pregunta 7

Pregunta
A network engineer wants to redesign the wireless network and make use of wireless network controllers that manage the many deployed wireless access points. In which network design module of the campus network architecture would the centralized wireless network controllers be found?
Respuesta
  • access-distribution
  • data center
  • services
  • enterprise edge

Pregunta 8

Pregunta
Refer to the exhibit. Which type of Cisco hierarchical LAN design model is used at school site 1?
Image:
d94b06b1-b81f-4a99-8403-334cf52b4efa (image/png)
Respuesta
  • three-tier
  • 7 layer
  • two-tier collapsed core
  • 3 layer

Pregunta 9

Pregunta
Which layer of the Cisco Collaboration Architecture contains unified communications and conference software such as Cisco WebEx Meetings, WebEx Social, Cisco Jabber, and TelePresence?
Respuesta
  • applications and devices
  • services module
  • enterprise WAN
  • service provider edge

Pregunta 10

Pregunta
Why would a company want network engineers to adhere to structured engineering principles when designing networks?
Respuesta
  • The resiliency of a network depends on being able to modify portions of the network, add services, or increase network capacity without adding new hardware devices.
  • A hierarchical network model is a useful high-level tool for designing a reliable network infrastructure, although it increases the complexity of network design
  • The network can be easily designed because of the separation of the various functions that exist on a network into modules.
  • The network is not expected to remain available under abnormal conditions such as extreme traffic loads or denial-of-service events.

Pregunta 11

Pregunta
What is creating a new challenge for IT departments by changing the border of the enterprise network?
Respuesta
  • energy costs
  • tablets
  • access layer switching
  • company-owned desktops

Pregunta 12

Pregunta
Which approach in networking allows for network changes, upgrades, or the introduction of new services in a controlled and staged fashion?
Respuesta
  • modular
  • static
  • borderless
  • network module

Pregunta 13

Pregunta
Which Cisco technology allows diverse network devices to connect securely, reliably, and seamlessly to enterprise network resources?
Respuesta
  • service provider edge
  • building distribution
  • Cisco AnyConnect
  • enterprise edge

Pregunta 14

Pregunta
In which layer of the hierarchical enterprise LAN design model would PoE for VoIP phones and access points be considered?
Respuesta
  • data link
  • physical
  • distribution
  • access
  • core

Pregunta 15

Pregunta
Which network architecture combines individual components to provide a comprehensive solution allowing people to cooperate and contribute to the production of something?
Respuesta
  • Cisco Enterprise Branch Architecture
  • Cisco Borderless Network Architecture
  • Cisco Enterprise Campus Architecture
  • Cisco Collaboration Architecture

Pregunta 16

Pregunta
What feature is more important at the core layer than at any other hierarchical network design layer?
Respuesta
  • aggregation of network links
  • QoS classification and marking
  • easy access of end devices
  • packet switching speed
  • data security

Pregunta 17

Pregunta
What are two of the top trends that affect network architecture design? (Choose two.)
Respuesta
  • BYOD
  • Internet security
  • internal security attacks
  • speed of Internet connectivity
  • cloud computing

Pregunta 18

Pregunta
Which three network architectures have been introduced by Cisco to address the emerging technology challenges created by the evolving business models? (Choose three.)
Respuesta
  • Cisco Borderless
  • Cisco Collaboration
  • Cisco Data Center
  • Cisco Enterprise Campus
  • Cisco Enterprise Edge
  • Cisco Enterprise Branch

Pregunta 19

Pregunta
What are two structured engineering principles necessary for successful implementation of a network design? (Choose two.)
Respuesta
  • modularity
  • resiliency
  • availability
  • security
  • quality of service

Pregunta 20

Pregunta
What is the recommended technology to use over a public WAN infrastructure when a branch office is connected to the corporate site?
Respuesta
  • VPN
  • ATM
  • ISDN
  • municipal Wi-Fi

Pregunta 21

Pregunta
Which statement describes cable?
Respuesta
  • Delivering services over a cable network requires downstream frequencies in the 50 to 860 MHz range, and upstream frequencies in the 5 to 42 MHz range
  • Cable subscribers may expect up to 27 Mbps of bandwidth on the upload path.
  • Each cable subscriber has dedicated upstream and downstream bandwidth
  • The cable subscriber must purchase a cable modem termination system (CMTS).

Pregunta 22

Pregunta
A home user lives within 10 miles (16 kilometers) of the Internet provider network. Which type of technology provides high-speed broadband service with wireless access for this home user?
Respuesta
  • WiMAX
  • municipal Wi-Fi
  • 802.11
  • DSL

Pregunta 23

Pregunta
Which feature is used when connecting to the Internet using DSL?
Respuesta
  • DSLAM
  • CMTS
  • IEEE 802.16
  • LTE

Pregunta 24

Pregunta
Which wireless technology provides Internet access through cellular networks?
Respuesta
  • LTE
  • municipal WiFi
  • WiMAX
  • satellite

Pregunta 25

Pregunta
Which connectivity method would be best for a corporate employee who works from home two days a week, but needs secure access to internal corporate databases?
Respuesta
  • VPN
  • cable
  • DSL
  • WiMAX

Pregunta 26

Pregunta
A corporation is looking for a solution to connect multiple, newly established remote branch offices. Which consideration is important when selecting a private WAN connection rather than a public WAN connection?
Respuesta
  • data security and confidentiality during transmission
  • higher data transmission rate
  • lower cost
  • website and file exchange service support

Pregunta 27

Pregunta
Which statement describes a characteristic of a WAN?
Respuesta
  • WAN networks are owned by service providers
  • A WAN provides end-user network connectivity to the campus backbone
  • All serial links are considered WAN connections
  • A WAN operates within the same geographic scope of a LAN, but has serial links

Pregunta 28

Pregunta
Which two devices are needed when a digital leased line is used to provide a connection between the customer and the service provider? (Choose two.)
Respuesta
  • CSU
  • DSU
  • dialup modem
  • access server
  • Layer 2 switch

Pregunta 29

Pregunta
A new corporation needs a data network that must meet certain requirements. The network must provide a low cost connection to sales people dispersed over a large geographical area. Which two types of WAN infrastructure would meet the requirements? (Choose two.)
Respuesta
  • public infrastructure
  • Internet
  • satellite
  • dedicated
  • private infrastructure

Pregunta 30

Pregunta
A small company with 10 employees uses a single LAN to share information between computers. Which type of connection to the Internet would be appropriate for this company?
Respuesta
  • a broadband service, such as DSL, through their local service provider
  • a dialup connection that is supplied by their local telephone service provider
  • private dedicated lines through their local service provider
  • Virtual Private Networks that would enable the company to connect easily and securely with employees

Pregunta 31

Pregunta
Which WAN technology establishes a dedicated constant point-to-point connection between two sites?
Respuesta
  • leased lines
  • ISDN
  • Frame Relay
  • ATM

Pregunta 32

Pregunta
What is a long distance fiber-optic media technology that supports both SONET and SDH, and assigns incoming optical signals to specific wavelengths of light?
Respuesta
  • DWDM
  • MPLS
  • ISDN
  • ATM

Pregunta 33

Pregunta
A customer needs a WAN virtual connection that provides high-speed, dedicated bandwidth between two sites. Which type of WAN connection would best fulfill this need?
Respuesta
  • Ethernet WAN
  • packet-switched network
  • circuit-switched network
  • MPLS

Pregunta 34

Pregunta
Which WAN technology is cell-based and well suited to carry voice and video traffic?
Respuesta
  • ATM
  • Frame Relay
  • VSAT
  • ISDN

Pregunta 35

Pregunta
Which equipment is needed for an ISP to provide Internet connections through cable service?
Respuesta
  • CMTS
  • DSLAM
  • access server
  • CSU/DSU

Pregunta 36

Pregunta
Which solution can provide Internet access to remote locations where no regular WAN services are available?
Respuesta
  • VSAT
  • WiMAX
  • municipal Wi-Fi
  • Ethernet

Pregunta 37

Pregunta
Which network scenario will require the use of a WAN?
Respuesta
  • Employees need to connect to the corporate email server through a VPN while traveling.
  • Employees need to access web pages that are hosted on the corporate web servers in the DMZ within their building
  • Employees in the branch office need to share files with the headquarters office that is located in a separate building on the same campus network
  • Employee workstations need to obtain dynamically assigned IP addresses

Pregunta 38

Pregunta
Which geographic scope requirement would be considered a distributed WAN scope?
Respuesta
  • many-to-many
  • local
  • one-to-one
  • regional
  • global
  • one-to-many

Pregunta 39

Pregunta
What is an advantage of packet-switched technology over circuit-switched technology?
Respuesta
  • Packet-switched networks can efficiently use multiple routes inside a service provider network.
  • Packet-switched networks are less susceptible to jitter than circuit-switched networks are
  • Packet-switched networks usually experience lower latency than circuit-switched networks experience
  • Packet-switched networks do not require an expensive permanent connection to each endpoint

Pregunta 40

Pregunta
What are two common high-bandwidth fiber-optic media standards? (Choose two.)
Respuesta
  • SONET
  • SDH
  • ATM
  • ANSI
  • ITU

Pregunta 41

Pregunta
What is a requirement of a connectionless packet-switched network?
Respuesta
  • Full addressing information must be carried in each data packet
  • Each packet has to carry only an identifier
  • A virtual circuit is created for the duration of the packet delivery
  • The network predetermines the route for a packet

Pregunta 42

Pregunta
What PPP information will be displayed if a network engineer issues the show ppp multilink command on Cisco router?
Respuesta
  • the serial interfaces participating in the multilink
  • the IP addresses of the link interfaces
  • the link LCP and NCP status
  • the queuing type on the link

Pregunta 43

Pregunta
In which situation would the use of PAP be preferable to the use of CHAP?
Respuesta
  • when plain text passwords are needed to simulate login at the remote host
  • when a network administrator prefers it because of ease of configuration
  • when multilink PPP is used
  • when router resources are limited

Pregunta 44

Pregunta
Refer to the exhibit. Which statement describes the status of the PPP connection?
Image:
6fbe2147-e4f7-4744-af6e-08dcf323a64f (image/jpeg)
Respuesta
  • Neither the link-establishment phase nor the network-layer phase completed successfully.
  • Only the link-establishment phase completed successfully.
  • Both the link-establishment and network-layer phase completed successfully.
  • Only the network-layer phase completed successfully.

Pregunta 45

Pregunta
Which serial 0/0/0 interface state will be shown if no serial cable is attached to the router, but everything else has been correctly configured and turned on?
Respuesta
  • Serial 0/0/0 is down, line protocol is down
  • Serial 0/0/0 is administratively down, line protocol is down
  • Serial 0/0/0 is up, line protocol is up
  • Serial 0/0/0 is up, line protocol is down
  • Serial 0/0/0 is up (looped)
  • Serial 0/0/0 is up (disabled)

Pregunta 46

Pregunta
A network engineer is monitoring an essential, but poor quality, PPP WAN link that periodically shuts down. An examination of the interface configurations shows that the ppp quality 90 command has been issued. What action could the engineer take to reduce the frequency with which the link shuts down?
Respuesta
  • Issue the command ppp quality 70.
  • Issue the command ppp quality 100
  • Set the DCE interface to a lower clock rate
  • Use the bandwidth command to increase the bandwidth of the link

Pregunta 47

Pregunta
Which three are types of LCP frames used with PPP? (Choose three.)
Respuesta
  • link-establishment frames
  • link-maintenance frames
  • link-termination frames
  • link-control frames
  • link-negotiation frames
  • link-acknowledgment frames

Pregunta 48

Pregunta
Which command can be used to view the cable type that is attached to a serial interface?
Respuesta
  • Router(config)# show controllers
  • Router(config)# show ip interface
  • Router(config)# show ip interface brief
  • Router(config)# show interfaces

Pregunta 49

Pregunta
How does PPP interface with different network layer protocols?
Respuesta
  • by using separate NCPs
  • by specifying the protocol during link establishment through LCP
  • by encoding the information field in the PPP frame
  • by negotiating with the network layer handler

Pregunta 50

Pregunta
Which protocol will terminate the PPP link after the exchange of data is complete?
Respuesta
  • LCP
  • NCP
  • IPXCP
  • IPCP

Pregunta 51

Pregunta
Which is an advantage of using PPP on a serial link instead of HDLC?
Respuesta
  • option for authentication
  • option for session establishment
  • fixed-size frames
  • higher speed transmission

Pregunta 52

Pregunta
At which layer of the OSI model does multiplexing take place?
Respuesta
  • Layer 3
  • Layer 4
  • Layer 2
  • Layer 1

Pregunta 53

Pregunta
During a PPP session establishment phase, which two messages are sent by the requested party if the options are not acceptable? (Choose two.)
Respuesta
  • Configure-Reject
  • Configure-Nak
  • Protocol-Reject
  • Code-Reject
  • Discard-Request

Pregunta 54

Pregunta
A network engineer is troubleshooting the loss of MPEG video viewing quality as MPEG video files cross a PPP WAN link. What could be causing this loss of quality?
Respuesta
  • The compress command was used when PPP was configured on the interfaces
  • Link Quality Monitoring was not configured correctly on each interface.
  • The clock rates configured on each serial interface do not match
  • PAP authentication was misconfigured on the link interfaces

Pregunta 55

Pregunta
Which address is used in the Address field of a PPP frame?
Respuesta
  • a single byte of binary 11111111
  • a single byte of binary 10101010
  • the IP address of the serial interface
  • a single byte of binary 00000000

Pregunta 56

Pregunta
Which three physical layer interfaces support PPP? (Choose three.)
Respuesta
  • HSSI
  • asynchronous serial
  • synchronous serial
  • FastEthernet
  • GigabitEthernet
  • Ethernet

Pregunta 57

Pregunta
Refer to the exhibit. A network administrator is configuring the PPP link between the two routers. However, the PPP link cannot be established. Based on the partial output of the show running-config command, what is the cause of the problem?
Image:
263c1caa-84fc-41d7-98a4-561ccbc151be (image/png)
Respuesta
  • The passwords do not match
  • The interface IP addresses are in different subnets
  • The usernames do not match
  • The passwords should be longer than 8 characters

Pregunta 58

Pregunta
Refer to the exhibit. Based on the debug command output that is shown, which statement is true of the operation of PPP.
Image:
85dc75a4-4ce0-41e2-8e73-8b7808c33f16.gif (image/gif)
Respuesta
  • A PPP session was successfully established.
  • Both PAP and CHAP authentication were attempted
  • CHAP authentication failed because of an unknown hostname.
  • The debug output is from router R2.

Pregunta 59

Pregunta
Which three statements are true about PPP? (Choose three.)
Respuesta
  • PPP uses LCPs to establish, configure, and test the data link connection.
  • PPP can use synchronous and asynchronous circuits
  • PPP uses LCPs to agree on format options such as authentication, compression, and error detection.
  • PPP can only be used between two Cisco devices.
  • PPP carries packets from several network layer protocols in LCPs.

Pregunta 60

Pregunta
Refer to the exhibit. What type of Layer 2 encapsulation will be used for connection D on the basis of this configuration on a newly installed router: RtrA(config)# interface serial0/0/0 RtrA(config-if)# ip address 128.107.0.2 255.255.255.252 RtrA(config-if)# no shutdown
Image:
3fb8b1b0-3598-499d-ab9d-09b3cec0478a (image/png)
Respuesta
  • HDLC
  • PPP
  • Frame Relay
  • Ethernet

Pregunta 61

Pregunta
Which two functions are provided by the Local Management Interface (LMI) that is used in Frame Relay networks? (Choose two.)
Respuesta
  • exchange of information about the status of virtual circuits
  • simple flow control
  • mapping of DLCIs to network addresses
  • error notification
  • congestion notification

Pregunta 62

Pregunta
Refer to the exhibit. A network administrator is configuring Frame Relay subinterfaces on R1. A distance vector routing protocol has also been configured. Data is routing successfully from R1 to networks that are connected to R2, R3, and R4, but routing updates between R2 and R3 are failing. What is the possible cause of this failure?
Image:
08e52670-67a1-4f57-a2ec-db46d47480c0 (image/png)
Respuesta
  • Split horizon is preventing successful routing table updates on the multipoint link
  • Subinterfaces cannot be used on multipoint Frame Relay links
  • Multipoint Frame Relay networks cannot be used with this IP addressing scheme
  • Two DLCI identifiers cannot be configured on one subinterface

Pregunta 63

Pregunta
What are the two major criteria that constitute the cost of a Frame Relay circuit? (Choose two.)
Respuesta
  • local loop
  • required bandwidth
  • QoS
  • end-to-end connectivity
  • circuit management fees

Pregunta 64

Pregunta
A network administrator uses the following command to configure a Frame Relay connection on a router towards the service provider: R1(config-if)# frame-relay map ip 209.165.200.225 102 broadcast What is the purpose of using the broadcast keyword?
Respuesta
  • to support dynamic routing protocol updates across the link
  • to enable dynamic IP address-to-DLCI mapping
  • to support IP address to MAC address resolution for the interface in the service provider site
  • to enable VoIP packet transmission across the link

Pregunta 65

Pregunta
Refer to the exhibit. A network administrator issues the show frame-relay map command to troubleshoot the Frame Relay connection problem. Based on the output, what is the possible cause of the problem?
Image:
bfe0e6c9-6445-472d-bbfc-0ee806501d70 (image/png)
Respuesta
  • The Frame Relay map statement on the R3 router for the PVC to R2 is configured with an incorrect DLCI number.
  • Inverse ARP is providing false information to the R1 router.
  • The IP address on S0/0/1 of R3 is configured incorrectly.
  • The S0/0/1 interface of the R2 router has been configured with the encapsulation frame relay ietf command
  • The S0/0/1 interface of the R2 router is down.

Pregunta 66

Pregunta
Which two Frame Relay router reachability issues are resolved by configuring logical subinterfaces? (Choose two.)
Respuesta
  • Link-state routing protocols are unable to complete neighbor discovery
  • Distance vector routing protocols are unable to forward routing updates back out the incoming interface to other remote routers
  • Frame Relay is unable to map a remote IP address to a DLCI
  • LMI status inquiry messages sent to the network are not received
  • Inverse ARP fails to associate all IP addresses to the correct DLCIs

Pregunta 67

Pregunta
Refer to the exhibit. Which two statements are correct? (Choose two.)
Image:
5d30e87d-a019-4b9b-b9f0-0cedc1098191 (image/png)
Respuesta
  • The IPv4 address of interface S0/1/1 on RB is 192.168.1.2
  • The DLCI that is attached to the VC on RA to RB is 62.
  • The Frame Relay map was set by using the command frame-relay map.
  • The IPv4 address of interface S0/1/0 on RA is 192.168.1.2.
  • The DLCI that is attached to the VC on RB to RA is 62.

Pregunta 68

Pregunta
The show frame-relay pvc command is best utilized to display the number for which type of packets that are received by the router?
Respuesta
  • FECN and BECN messages
  • Inverse ARP messages
  • Inverse Neighbor Discovery messages
  • LMI status messages

Pregunta 69

Pregunta
Why would a customer request a Frame Relay circuit with a CIR of zero?
Respuesta
  • to have a link with reduced costs
  • to have a backup circuit for critical data transmissions
  • to have a circuit used for voice traffic
  • to have better QoS
  • to have a circuit used for network management traffic

Pregunta 70

Pregunta
Which three notification mechanisms are used when congestion is present in a Frame Relay network? (Choose three.)
Respuesta
  • BECN
  • DE
  • FECN
  • inverse ARP
  • DLCI
  • CIR

Pregunta 71

Pregunta
A router interface connects to a Frame Relay network over a preconfigured logical circuit that does not have a direct electrical connection from end to end. Which type of circuit is being used?
Respuesta
  • PVC
  • SVC
  • full mesh
  • hub and spoke
  • dedicated leased line

Pregunta 72

Pregunta
What is an advantage of Frame Relay WAN technology compared with leased lines?
Respuesta
  • It uses one interface to connect to several remote sites
  • It supports both voice and data traffic
  • It provides permanent dedicated capacity to the customers
  • It offers a guaranteed direct electrical circuit from end to end

Pregunta 73

Pregunta
Which three actions can be taken to solve Layer 3 routing protocol router reachability issues when using Frame Relay? (Choose three.)
Respuesta
  • Use a full mesh topology
  • Use subinterfaces
  • Disable split horizon
  • Configure static DLCI mappings
  • Disable Inverse ARP
  • Use the keyword cisco as the LMI type

Pregunta 74

Pregunta
A network administrator has statically configured the LMI type on the interface of a Cisco router that is running Cisco IOS Release 11.2. If the service provider modifies its own LMI type in the future, what step must the network administrator take?
Respuesta
  • The network administrator must statically set the LMI type to be compatible with the service provider
  • The network administrator simply has to verify connectivity with the provider, because the router has an LMI autosensing feature that automatically detects the LMI type
  • The network administrator does not have to do anything, because all LMI types are compatible with one another.
  • The network administrator must modify the keepalive time interval to maintain connectivity with the LMI type of the service provider.

Pregunta 75

Pregunta
Which technology allows a Layer 3 IPv4 address to be dynamically obtained from a Layer 2 DLCI?
Respuesta
  • Inverse Address Resolution Protocol
  • Address Resolution Protocol
  • Neighbor Discovery
  • Inverse Neighbor Discovery

Pregunta 76

Pregunta
When would the multipoint keyword be used in Frame Relay PVCs configuration?
Respuesta
  • when participating routers are in the same subnet
  • when using physical interfaces
  • when global DLCIs are in use
  • when multicasts must be supported

Pregunta 77

Pregunta
A network administrator of a large organization is designing a Frame Relay network. The organization needs redundancy between some key sites but not all. What WAN topology should the administrator choose to meet their needs?
Respuesta
  • partial mesh
  • star
  • extended star
  • full mesh

Pregunta 78

Pregunta
A network engineer has issued the interface serial 0/0/1.102 point-to-point command on a router that will be communicating with another router over a Frame Relay virtual circuit that is identified by the DLCI 102. Which two commands would be appropriate for the network engineer to issue next? (Choose two.)
Respuesta
  • frame-relay interface-dlci 102
  • ip address 10.1.1.10 255.255.255.252
  • no ip address
  • encapsulation frame relay
  • no shutdown

Pregunta 79

Pregunta
Refer to the exhibit. Based on the output that is shown, what type of NAT has been implemented?
Image:
b5bb7b98-9b1b-4ddf-8a78-0c8eae20ac50 (image/png)
Respuesta
  • PAT using an external interface
  • dynamic NAT with a pool of two public IP addresses
  • static NAT with a NAT pool
  • static NAT with one entry

Pregunta 80

Pregunta
Refer to the exhibit. What is the purpose of the command marked with an arrow shown in the partial configuration output of a Cisco broadband router?
Image:
533126ca-012a-42fb-aca4-017c7582c6b9 (image/jpeg)
Respuesta
  • defines which addresses can be translated
  • defines which addresses are allowed into the router
  • defines which addresses are allowed out of the router
  • defines which addresses are assigned to a NAT pool

Pregunta 81

Pregunta
What is the purpose of port forwarding?
Respuesta
  • Port forwarding allows an external user to reach a service on a private IPv4 address that is located inside a LAN.
  • Port forwarding allows users to reach servers on the Internet that are not using standard port numbers.
  • Port forwarding allows an internal user to reach a service on a public IPv4 address that is located outside a LAN.
  • Port forwarding allows for translating inside local IP addresses to outside local addresses

Pregunta 82

Pregunta
Which statement accurately describes dynamic NAT?
Respuesta
  • It provides an automated mapping of inside local to inside global IP addresses.
  • It dynamically provides IP addressing to internal hosts
  • It always maps a private IP address to a public IP address
  • It provides a mapping of internal host names to IP addresses.

Pregunta 83

Pregunta
Which version of NAT allows many hosts inside a private network to simultaneously use a single inside global address for connecting to the Internet?
Respuesta
  • PAT
  • port forwarding
  • dynamic NAT
  • static NAT

Pregunta 84

Pregunta
Refer to the exhibit. R1 is configured for NAT as displayed. What is wrong with the configuration?
Image:
bdc613b5-725a-442f-8c03-701b1ffd20e2 (image/jpeg)
Respuesta
  • NAT-POOL2 is not bound to ACL 1.
  • Interface Fa0/0 should be identified as an outside NAT interface.
  • The NAT pool is incorrect
  • Access-list 1 is misconfigured

Pregunta 85

Pregunta
What is a disadvantage of NAT?
Respuesta
  • There is no end-to-end addressing
  • The internal hosts have to use a single public IPv4 address for external communication
  • The router does not need to alter the checksum of the IPv4 packets.
  • The costs of readdressing hosts can be significant for a publicly addressed network.

Pregunta 86

Pregunta
Which prefix is used for IPv6 ULAs?
Respuesta
  • FC00::/7
  • 2001:7F8::/29
  • FF02::1:FF00:0/104
  • 2001:DB8:1:2::/64

Pregunta 87

Pregunta
How does NAT complicate the use of IPsec?
Respuesta
  • Header values are modified which causes issues with integrity checks.
  • End-to-end IPv4 traceability is lost.
  • Troubleshooting is made impossible
  • Network performance is degraded even more than with just NAT.

Pregunta 88

Pregunta
A network administrator configures the border router with the command R1(config)# ip nat inside source list 4 pool corp What is required to be configured in order for this particular command to be functional?
Respuesta
  • a NAT pool named corp that defines the starting and ending public IP addresses
  • ip nat outside to be enabled on the interface that connects to the LAN affected by the NAT
  • an access list numbered 4 that defines the starting and ending public IP addresses
  • an access list named corp that defines the private addresses that are affected by NAT
  • a VLAN named corp to be enabled and active and routed by R1

Pregunta 89

Pregunta
What is the group of public IPv4 addresses used on a NAT-enabled router known as?
Respuesta
  • inside global addresses
  • outside local addresses
  • outside global addresses
  • inside local addresses

Pregunta 90

Pregunta
Refer to the exhibit. The NAT configuration applied to the router is as follows: ERtr(config)# access-list 1 permit 10.0.0.0 0.255.255.255 ERtr(config)# ip nat pool corp 209.165.201.6 209.165.201.30 netmask 255.255.255.224 ERtr(config)# ip nat inside source list 1 pool corp overload ERtr(config)# ip nat inside source static 10.10.10.55 209.165.201.4 ERtr(config)# interface gigabitethernet 0/0 ERtr(config-if)# ip nat inside ERtr(config-if)# interface serial 0/0/0 ERtr(config-if)# ip nat outside Based on the configuration and the output shown, what can be determined about the NAT status within the organization?
Image:
83105d20-b516-427c-865d-e0a67f39f600 (image/png)
Respuesta
  • Not enough information is given to determine if both static and dynamic NAT are working.
  • NAT is working
  • Static NAT is working, but dynamic NAT is not.
  • Dynamic NAT is working, but static NAT is not.

Pregunta 91

Pregunta
Which configuration would be appropriate for a small business that has the public IP address of 209.165.200.225/30 assigned to the external interface on the router that connects to the Internet?
Respuesta
  • access-list 1 permit 10.0.0.0 0.255.255.255 ip nat inside source list 1 interface serial 0/0/0 overload
  • access-list 1 permit 10.0.0.0 0.255.255.255 ip nat pool comp 192.168.2.1 192.168.2.8 netmask 255.255.255.240 ip nat inside source list 1 pool comp overload ip nat inside source static 10.0.0.5 209.165.200.225
  • access-list 1 permit 10.0.0.0 0.255.255.255 ip nat pool comp 192.168.2.1 192.168.2.8 netmask 255.255.255.240 ip nat inside source list 1 pool comp
  • access-list 1 permit 10.0.0.0 0.255.255.255 ip nat pool comp 192.168.2.1 192.168.2.8 netmask 255.255.255.240 ip nat inside source list 1 pool comp overload

Pregunta 92

Pregunta
When NAT is employed in a small office, which address type is typically used for hosts on the local LAN?
Respuesta
  • private IP addresses
  • Internet-routable addresses
  • both private and public IP addresses
  • global public IP addresses

Pregunta 93

Pregunta
When dynamic NAT without overloading is being used, what happens if seven users attempt to access a public server on the Internet when only six addresses are available in the NAT pool?
Respuesta
  • The request to the server for the seventh user fails
  • All users can access the server
  • No users can access the server.
  • The first user gets disconnected when the seventh user makes the request

Pregunta 94

Pregunta
Which technology would be used on a router that is running both IPv4 and IPv6?
Respuesta
  • dual stack
  • NAT for IPv6
  • dynamic NAT
  • static NAT

Pregunta 95

Pregunta
What is a characteristic of unique local addresses?
Respuesta
  • They allow sites to be combined without creating any address conflicts
  • They are defined in RFC 3927.
  • Their implementation depends on ISPs providing the service.
  • They are designed to improve the security of IPv6 networks

Pregunta 96

Pregunta
What are two of the required steps to configure PAT? (Choose two.)
Respuesta
  • Identify the inside interface
  • Define a pool of global addresses to be used for overload translation
  • Create a standard access list to define applications that should be translated
  • Define the hello and interval timers to match the adjacent neighbor router
  • Define the range of source ports to be used

Pregunta 97

Pregunta
Which type of NAT maps a single inside local address to a single inside global address?
Respuesta
  • static
  • dynamic
  • overloading
  • port address translation

Pregunta 98

Pregunta
Typically, which network device would be used to perform NAT for a corporate environment?
Respuesta
  • router
  • switch
  • server
  • host device
  • DHCP server

Pregunta 99

Pregunta
Which DSL technology provides higher downstream bandwidth to the user than upstream bandwidth?
Respuesta
  • ADSL
  • TDMA
  • SDSL
  • CDMA

Pregunta 100

Pregunta
What two layers of the OSI model are defined by DOCSIS? (Choose two.)
Respuesta
  • Layer 1
  • Layer 2
  • Layer 3
  • Layer 4
  • Layer 5
  • Layer 6
  • Layer 7

Pregunta 101

Pregunta
What are two features of wavelengths in the electromagnetic spectrum? (Choose two.)
Respuesta
  • They are the distance from the peak of one radio wave to the peak of the next radio wave
  • They are calculated by the speed of propagation of the electromagnetic signal divided by its frequency in cycles per second
  • They are the distance from the peak of one radio wave to the trough of the next radio wave
  • They are the rate at which current or voltage cycles occur
  • They are calculated by the number of waves per second

Pregunta 102

Pregunta
Which two network components does a teleworker require to connect remotely and securely from home to the corporate network? (Choose two.)
Respuesta
  • VPN client software or VPN-enabled router
  • broadband Internet connection
  • VPN server or concentrator
  • authentication server
  • multifunction security appliance

Pregunta 103

Pregunta
What are two Layer 2 WAN technologies that can provide secure remote connections between corporate branch offices? (Choose two.)
Respuesta
  • Frame Relay
  • leased lines
  • QoS
  • LTE
  • IPsec

Pregunta 104

Pregunta
What are two characteristics of a PPPoE configuration on a Cisco customer router? (Choose two.)
Respuesta
  • The Ethernet interface does not have an IP address
  • The PPP configuration is on the dialer interface
  • The customer router CHAP username and password are independent of what is configured on the ISP router
  • The dialer pool command is applied to the Ethernet interface to link it to the dialer interface
  • An MTU size of 1492 bytes is configured on the Ethernet interface

Pregunta 105

Pregunta
Which cable network communication technology is secure, extremely resistant to noise, and employs spread-spectrum technology?
Respuesta
  • S-CDMA
  • TDMA
  • FDMA
  • CDMA

Pregunta 106

Pregunta
Which standard specifies the channel frequencies and the deterministic access method of cable networks?
Respuesta
  • DOCSIS
  • 802.16
  • WiMAX
  • LTE

Pregunta 107

Pregunta
Which technology provides a secure connection between a SOHO and the headquarters office?
Respuesta
  • VPN
  • PPPoE
  • WiMax
  • QoS

Pregunta 108

Pregunta
What mobile broadband communication Layer 2 technology uses a special coding scheme to assign each transmitter a specific code?
Respuesta
  • CDMA
  • FDMA
  • UMTS
  • TDMA

Pregunta 109

Pregunta
Which type of long distance telecommunication technology provides point-to-point connections and cellular access?
Respuesta
  • WiMax
  • satellite
  • municipal Wi-Fi
  • mobile broadband

Pregunta 110

Pregunta
Which medium is used for delivering data via DSL technology through PSTN?
Respuesta
  • fiber
  • copper
  • wireless
  • radio frequency

Pregunta 111

Pregunta
What technology provides service providers the capability to use authentication, accounting, and link management features to customers over Ethernet networks?
Respuesta
  • PPPoE
  • ISDN
  • DSL
  • QoS

Pregunta 112

Pregunta
Which broadband wireless technology is based on the 802.11 standard?
Respuesta
  • municipal Wi-Fi
  • UMTS
  • CDMA
  • WiMAX

Pregunta 113

Pregunta
Which broadband technology would be best for a user that needs remote access when traveling in mountains and at sea?
Respuesta
  • satellite
  • Wi-Fi Mesh
  • mobile broadband
  • WiMax

Pregunta 114

Pregunta
What are two disadvantages of employing teleworkers in an organization? (Choose two.)
Respuesta
  • the need to implement a new management style
  • increased difficulty of tracking task progress
  • slower customer service response times
  • increase in office expenses
  • increased usage of sick or vacation days

Pregunta 115

Pregunta
A company is looking for the least expensive broadband solution that provides at least 10 Mb/s download speed. The company is located 5 miles from the nearest provider. Which broadband solution would be appropriate?
Respuesta
  • cable
  • DSL
  • satellite
  • WiMax

Pregunta 116

Pregunta
What functionality is required on routers to provide remote workers with VoIP and videoconferencing capabilities?
Respuesta
  • QoS
  • VPN
  • PPPoE
  • IPsec

Pregunta 117

Pregunta
How is voice traffic affected when the customer uses ADSL technology?
Respuesta
  • ADSL signals can distort voice transmissions
  • No special equipment is needed to separate voice and data signals
  • Voice signals are on a separate wire pair from ADSL signals
  • Voice traffic is interrupted if the ADSL service fails

Pregunta 118

Pregunta
What advantage does DSL have compared to cable technology?
Respuesta
  • DSL is not a shared medium
  • DSL has no distance limitations
  • DSL is faster
  • DSL upload and download speeds are always the same

Pregunta 119

Pregunta
Which two OSI Layer 1 specifications does DOCSIS define for a cable Internet connection? (Choose two.)
Respuesta
  • modulation technique
  • channel bandwidth
  • the separation of the voice and data transmissions
  • VPN tunneling requirements
  • a deterministic media access method

Pregunta 120

Pregunta
Why is the MTU for a PPPoE DSL configuration reduced from 1500 bytes to 1492?
Respuesta
  • to accommodate the PPPoE headers
  • to establish a secure tunnel with less overhead
  • to reduce congestion on the DSL link
  • to enable CHAP authentication

Pregunta 121

Pregunta
When PPPoE is configured on a customer router, which two commands must have the same value for the configuration to work? (Choose two.)
Respuesta
  • interface dialer 2
  • ppp chap password 2
  • ppp chap hostname 2
  • interface gigabitethernet 0/2
  • dialer pool 2
  • pppoe-client dial-pool-number 2

Pregunta 122

Pregunta
Two corporations have just completed a merger. The network engineer has been asked to connect the two corporate networks without the expense of leased lines. Which solution would be the most cost effective method of providing a proper and secure connection between the two corporate networks?
Respuesta
  • site-to-site VPN
  • Cisco Secure Mobility Clientless SSL VPN
  • Cisco AnyConnect Secure Mobility Client with SSL
  • Frame Relay
  • remote access VPN using IPsec

Pregunta 123

Pregunta
How can the use of VPNs in the workplace contribute to lower operating costs?
Respuesta
  • VPNs can be used across broadband connections rather than dedicated WAN links.
  • High-speed broadband technology can be replaced with leased lines
  • VPNs require a subscription from a specific Internet service provider that specializes in secure connections.
  • VPNs prevents connectivity to SOHO users

Pregunta 124

Pregunta
A network design engineer is planning the implementation of an IPsec VPN. Which hashing algorithm would provide the strongest level of message integrity?
Respuesta
  • 512-bit SHA
  • SHA-1
  • AES
  • MD5

Pregunta 125

Pregunta
Refer to the exhibit. A tunnel was implemented between routers R1 and R2. Which two conclusions can be drawn from the R1 command output? (Choose two.)
Image:
3fe43215-817b-4849-87d6-2a6b74dd31a8 (image/png)
Respuesta
  • A GRE tunnel is being used.
  • The data that is sent across this tunnel is not secure.
  • This tunnel mode provides encryption
  • This tunnel mode does not support IP multicast tunneling.
  • This tunnel mode is not the default tunnel interface mode for Cisco IOS software.

Pregunta 126

Pregunta
Which two characteristics describe IPsec VPNs? (Choose two.)
Respuesta
  • Specific PC client configuration is required to connect to the VPN.
  • IPsec authenticates by using shared secrets or digital certificates.
  • IPsec authentication is one-way or two-way
  • IPsec is specifically designed for web-enabled applications
  • Key lengths range from 40 bits to 256 bits

Pregunta 127

Pregunta
How is "tunneling" accomplished in a VPN?
Respuesta
  • New headers from one or more VPN protocols encapsulate the original packets.
  • Packets are disguised to look like other types of traffic so that they will be ignored by potential attackers
  • All packets between two hosts are assigned to a single physical medium to ensure that the packets are kept private.
  • A dedicated circuit is established between the source and destination devices for the duration of the connection.

Pregunta 128

Pregunta
Which service of IPsec verifies that secure connections are formed with the intended sources of data?
Respuesta
  • authentication
  • confidentiality
  • data integrity
  • encryption

Pregunta 129

Pregunta
Which two scenarios are examples of remote access VPNs? (Choose two.)
Respuesta
  • A mobile sales agent is connecting to the company network via the Internet connection at a hotel.
  • An employee who is working from home uses VPN client software on a laptop in order to connect to the company network.
  • A toy manufacturer has a permanent VPN connection to one of its parts suppliers.
  • All users at a large branch office can access company resources through a single VPN connection
  • A small branch office with three employees has a Cisco ASA that is used to create a VPN connection to the HQ

Pregunta 130

Pregunta
What is an advantage of using the Cisco Secure Mobility Clientless SSL VPN?
Respuesta
  • Clients do not require special software.
  • Any device can connect to the network without authentication
  • Security is provided by prohibiting network access through a browser
  • Clients use SSH to access network resources

Pregunta 131

Pregunta
Which critical function that is provided by IPsec ensures that data has not been changed in transit between the source and destination?
Respuesta
  • integrity
  • confidentiality
  • authentication
  • anti-replay protection

Pregunta 132

Pregunta
Which statement describes a feature of site-to-site VPNs?
Respuesta
  • Internal hosts send normal, unencapsulated packets.
  • The VPN connection is not statically defined.
  • VPN client software is installed on each host
  • Individual hosts can enable and disable the VPN connection

Pregunta 133

Pregunta
What is an IPsec protocol that provides data confidentiality and authentication for IP packets?
Respuesta
  • ESP
  • RSA
  • IKE
  • AH

Pregunta 134

Pregunta
What is the purpose of utilizing Diffie-Hellman (DH) algorithms as part of the IPsec standard?
Respuesta
  • DH algorithms allow two parties to establish a shared secret key that is used by encryption and hash algorithms.
  • DH algorithms allow two parties to establish a shared public key that is used by encryption and hash algorithms.
  • DH algorithms allow unlimited parties to establish a shared secret key that is used by encryption and hash algorithms.
  • DH algorithms allow unlimited parties to establish a shared public key that is used by encryption and hash algorithms.

Pregunta 135

Pregunta
Which statement correctly describes IPsec?
Respuesta
  • IPsec works at Layer 3, but can protect traffic from Layer 4 through Layer 7.
  • IPsec uses algorithms that were developed specifically for that protocol
  • IPsec implements its own method of authentication
  • IPsec is a Cisco proprietary standard

Pregunta 136

Pregunta
Which two algorithms use Hash-based Message Authentication Code for message authentication? (Choose two.)
Respuesta
  • SHA
  • MD5
  • DES
  • 3DES
  • AES

Pregunta 137

Pregunta
What key question would help determine whether an organization should use an SSL VPN or an IPsec VPN for the remote access solution of the organization?
Respuesta
  • Do users need to be able to connect without requiring special VPN software?
  • What applications or network resources do the users need for access?
  • Are both encryption and authentication required?
  • Is a Cisco router used at the destination of the remote access tunnel?

Pregunta 138

Pregunta
What is the purpose of a message hash in a VPN connection?
Respuesta
  • It ensures that the data has not changed while in transit.
  • It ensures that the data is coming from the correct source.
  • It ensures that the data cannot be read in plain text.
  • It ensures that the data cannot be duplicated and replayed to the destination.

Pregunta 139

Pregunta
Which remote access implementation scenario will support the use of generic routing encapsulation tunneling?
Respuesta
  • a central site that connects to a SOHO site without encryption
  • a mobile user who connects to a router at a central site
  • a mobile user who connects to a SOHO site
  • a branch office that connects securely to a central site

Pregunta 140

Pregunta
A network design engineer is planning the implementation of a cost-effective method to interconnect multiple networks securely over the Internet. Which type of technology is required?
Respuesta
  • a VPN gateway
  • a GRE IP tunnel
  • a leased line
  • a dedicated ISP

Pregunta 141

Pregunta
Refer to the exhibit. Which IP address would be configured on the tunnel interface of the destination router?
Image:
bf7feaff-cffb-4db8-a864-f0d391042c68 (image/png)
Respuesta
  • 172.16.1.2
  • 209.165.200.225
  • 172.16.1.1
  • 209.165.200.226

Pregunta 142

Pregunta
Which algorithm is an asymmetrical key cryptosystem?
Respuesta
  • RSA
  • AES
  • DES
  • 3DES

Pregunta 143

Pregunta
Refer to the exhibit. From what location have the syslog messages been retrieved?
Image:
d372e5b7-16c1-4518-a5a3-4a234546677b.gif (image/gif)
Respuesta
  • router RAM
  • router NVRAM
  • syslog client
  • syslog server

Pregunta 144

Pregunta
Which syslog message type is accessible only to an administrator and only via the Cisco CLI?
Respuesta
  • debugging
  • alerts
  • errors
  • emergency

Pregunta 145

Pregunta
The command ntp server 10.1.1.1 is issued on a router. What impact does this command have?
Respuesta
  • synchronizes the clock of the device to the timeserver that is located at IP address 10.1.1.1
  • determines which server to send system log files to
  • ensures that all logging will have a time stamp associated with it
  • identifies the server on which to store backup configurations

Pregunta 146

Pregunta
A network administrator has issued the logging trap 4 global configuration mode command. What is the result of this command?
Respuesta
  • The syslog client will send to the syslog server any event message that has a severity level of 4 and lower.
  • After four events, the syslog client will send an event message to the syslog server.
  • The syslog client will send to the syslog server event messages with an identification trap level of only 4.
  • The syslog client will send to the syslog server any event message that has a severity level of 4 and higher.

Pregunta 147

Pregunta
Which protocol is used by network administrators to track and gather statistics on TCP/IP packets that are entering or exiting network devices?
Respuesta
  • NetFlow
  • NTP
  • syslog
  • SNMP

Pregunta 148

Pregunta
Which SNMP version uses weak community string-based access control and supports bulk retrieval?
Respuesta
  • SNMPv2c
  • SNMPv3
  • SNMPv1
  • SNMPv2Classic

Pregunta 149

Pregunta
A network administrator issues two commands on a router: R1(config)# snmp-server host 10.10.50.25 version 2c campus R1(config)# snmp-server enable traps What can be concluded after the commands are entered?
Respuesta
  • If an interface comes up, a trap is sent to the server
  • No traps are sent, because the notification-types argument was not specified yet.
  • The snmp-server enable traps command needs to be used repeatedly if a particular subset of trap types is desired
  • Traps are sent with the source IP address as 10.10.50.25.

Pregunta 150

Pregunta
Refer to the exhibit. While planning an upgrade, a network administrator uses the Cisco NetFlow utility to analyze data flow in the current network. Which protocol used the greatest amount of network time?
Image:
cc56381b-9ab2-4500-b419-32dda204f8fc (image/jpeg)
Respuesta
  • UDP-other
  • TCP-Telnet
  • TCP-FTP
  • UDP-DNS
  • TCP-other

Pregunta 151

Pregunta
When SNMPv1 or SNMPv2 is being used, which feature provides secure access to MIB objects?
Respuesta
  • community strings
  • message integrity
  • packet encryption
  • source validation

Pregunta 152

Pregunta
Which type of information can an administrator obtain with the show ip cache flow command?
Respuesta
  • the protocol that uses the largest volume of traffic
  • the configuration of the export parameters
  • the NetFlow version that is enabled
  • whether NetFlow is configured on the correct interface and in the correct direction

Pregunta 153

Pregunta
A network administrator has issued the snmp-server user admin1 admin v3 encrypted auth md5 abc789 priv des 256 key99 command. What are two features of this command? (Choose two.)
Respuesta
  • It uses the MD5 authentication of the SNMP messages.
  • It adds a new user to the SNMP group.
  • It forces the network manager to log into the agent to retrieve the SNMP messages.
  • It allows a network administrator to configure a secret encrypted password on the SNMP server.
  • It restricts SNMP access to defined SNMP managers.

Pregunta 154

Pregunta
Which two statements describe items to be considered in configuring NetFlow? (Choose two.)
Respuesta
  • Netflow can only be used in a unidirectional flow
  • NetFlow consumes additional memory
  • Netflow requires both management and agent software.
  • NetFlow can only be used if all devices on the network support it
  • Netflow requires UDP port 514 for notification messages

Pregunta 155

Pregunta
What are the most common syslog messages?
Respuesta
  • link up and link down messages
  • output messages that are generated from debug output
  • those that occur when a packet matches a parameter condition in an access control list
  • error messages about hardware or software malfunctions

Pregunta 156

Pregunta
Which destination do Cisco routers and switches use by default when sending syslog messages for all severity levels?
Respuesta
  • console
  • nearest syslog server
  • NVRAM
  • RAM

Pregunta 157

Pregunta
Refer to the exhibit. What does the number 17:46:26.143 represent?
Image:
29673d77-e323-4ef4-83f4-fae754044156 (image/png)
Respuesta
  • the time when the syslog message was issued
  • the time passed since the syslog server has been started
  • the time on the router when the show logging command was issued
  • the time passed since the interfaces have been up

Pregunta 158

Pregunta
Refer to the exhibit. What can be concluded from the produced output?
Image:
2c4266a9-b6ba-4c58-b4cc-79dea57aaceb (image/png)
Respuesta
  • An ACL was configured to restrict SNMP access to an SNMP manager.
  • This is the output of the show snmp command without any parameters.
  • The location of the device was not configured with the snmp-server location command.
  • The system contact was not configured with the snmp-server contact command.

Pregunta 159

Pregunta
Which protocol or service can be configured to send unsolicited messages to alert the network administrator about a network event such as an extremely high CPU utilization on a router?
Respuesta
  • SNMP
  • NTP
  • syslog
  • NetFlow

Pregunta 160

Pregunta
When logging is used, which severity level indicates that a device is unusable?
Respuesta
  • Emergency - Level 0
  • Critical - Level 2
  • Alert - Level 1
  • Error - Level 3

Pregunta 161

Pregunta
Which protocol or service allows network administrators to receive system messages that are provided by network devices?
Respuesta
  • syslog
  • NetFlow
  • NTP
  • SNMP

Pregunta 162

Pregunta
What is the most common purpose of implementing NetFlow in a networked environment?
Respuesta
  • to support accounting and monitoring with consumer applications
  • to passively capture changing events that occur in the network and to perform after-the-fact-analysis
  • to actively capture traffic from networked devices
  • to monitor live data usage and to control traffic flow with set messages

Pregunta 163

Pregunta
Which statement describes SNMP operation?
Respuesta
  • A set request is used by the NMS to change configuration variables in the agent device.
  • An SNMP agent that resides on a managed device collects information about the device and stores that information remotely in the MIB that is located on the NMS
  • An NMS periodically polls the SNMP agents that are residing on managed devices by using traps to query the devices for data
  • A get request is used by the SNMP agent to query the device for data

Pregunta 164

Pregunta
How does NetFlow function on a Cisco router or multilayer switch?
Respuesta
  • One user connection to an application exists as two NetFlow flows.
  • Netflow captures and analyzes traffic
  • NetFlow does not consume any additional memory.
  • On 2960 switches, Netlow allows for data export

Pregunta 165

Pregunta
Which SNMP feature provides a solution to the main disadvantage of SNMP polling?
Respuesta
  • SNMP trap messages
  • SNMP community strings
  • SNMP set messages
  • SNMP get messages

Pregunta 166

Pregunta
A user in a large office calls technical support to complain that a PC has suddenly lost connectivity to the network. The technician asks the caller to talk to nearby users to see if other machines are affected. The caller reports that several immediate neighbors in the same department have a similar problem and that they cannot ping each other. Those who are seated in other departments have connectivity. What should the technician check as the first step in troubleshooting the issue?
Respuesta
  • the status of the departmental workgroup switch in the wiring closet
  • the cable connection between a PC and a network outlet that is used by a neighbor
  • the cable that connects the PC of the caller to the network jack
  • the trunks between switches in the wiring closet
  • the power outlet to the PC that is used by the caller

Pregunta 167

Pregunta
When should a network performance baseline be measured?
Respuesta
  • during normal work hours of an organization
  • immediately after the main network devices restarted
  • after normal work hours to reduce possible interruptions
  • when a denial of service attack to the network is detected and blocked

Pregunta 168

Pregunta
What is a purpose of establishing a network baseline?
Respuesta
  • It creates a point of reference for future network evaluations.
  • It manages the performance of network devices
  • It provides a statistical average for network performance
  • It checks the security configuration of network devices

Pregunta 169

Pregunta
A network technician is troubleshooting an email connection problem. Which question to the end-user will provide clear information to better define the problem?
Respuesta
  • When did you first notice your email problem?
  • What kind of equipment are you using to send emails?
  • How big are the emails you tried to send?
  • Is your email working now?

Pregunta 170

Pregunta
In which step of gathering symptoms does the network engineer determine if the problem is at the core, distribution, or access layer of the network?
Respuesta
  • Narrow the scope
  • Determine the symptoms
  • Document the symptoms
  • Gather information
  • Determine ownership

Pregunta 171

Pregunta
Which number represents the most severe level of syslog logging?
Respuesta
  • 0
  • 10
  • 1
  • 7
  • 100

Pregunta 172

Pregunta
A team of engineers has identified a solution to a significant network problem. The proposed solution is likely to affect critical network infrastructure components. What should the team follow while implementing the solution to avoid interfering with other processes and infrastructure?
Respuesta
  • change-control procedures
  • knowledge base guidelines
  • one of the layered troubleshooting approaches
  • syslog messages and reports

Pregunta 173

Pregunta
After which step in the network troubleshooting process would one of the layered troubleshooting methods be used?
Respuesta
  • gathering symptoms from suspect devices
  • documenting symptoms
  • determining ownership
  • narrowing the scope

Pregunta 174

Pregunta
Which type of tool would an administrator use to capture packets that are going to and from a particular device?
Respuesta
  • protocol analyzer
  • baselining tool
  • NMS tool
  • knowledge base

Pregunta 175

Pregunta
Which troubleshooting method begins by examining cable connections and wiring issues?
Respuesta
  • bottom-up
  • top-down
  • divide-and-conquer
  • substitution

Pregunta 176

Pregunta
An administrator is troubleshooting an Internet connectivity problem on a router. The output of the show interfaces gigabitethernet 0/0 command reveals higher than normal framing errors on the interface that connects to the Internet. At what layer of the OSI model is the problem likely occurring?
Respuesta
  • Layer 2
  • Layer 1
  • Layer 3
  • Layer 4
  • Layer 7

Pregunta 177

Pregunta
A company is setting up a web site with SSL technology to protect the authentication credentials required to access the web site. A network engineer needs to verify that the setup is correct and that the authentication is indeed encrypted. Which tool should be used?
Respuesta
  • protocol analyzer
  • baselining tool
  • fault-management tool
  • cable analyzer

Pregunta 178

Pregunta
Which statement describes the physical topology for a LAN?
Respuesta
  • It defines how hosts and network devices connect to the LAN.
  • It shows the order in which hosts access the network
  • It describes whether the LAN is a broadcast or token-passing network.
  • It depicts the addressing scheme that is employed in the LAN.

Pregunta 179

Pregunta
A network engineer is troubleshooting a network problem and can successfully ping between two devices. However, Telnet between the same two devices does not work. Which OSI layers should the administrator investigate next?
Respuesta
  • from the network layer to the application layer
  • from the network layer to the physical layer
  • only the network layer
  • all of the layers

Pregunta 180

Pregunta
The newly configured ASBR that connects a company to the Internet has a default route configured and has the default-information originate command entered. Devices connected through this router can access the Internet. The problem is that no other OSPF routers have a default route in the routing table and no other users throughout the organization can access the Internet. What could be the problem?
Respuesta
  • The ASBR does not have an OSPF neighbor.
  • The ASBR does not have OSPF configured
  • The other routers are not configured to accept LSA type 4s.
  • The ASBR should use the exit_interface argument instead of next-hop on the default route.

Pregunta 181

Pregunta
Users report that the new web site http://www.company1.biz cannot be accessed. The helpdesk technician checks and verifies that the web site can be accessed with http://www.company1.biz:90. Which layer in the TCP/IP model is involved in troubleshooting this issue?
Respuesta
  • transport
  • application
  • internet
  • network access

Pregunta 182

Pregunta
A user reports that after an OS patch of the networking subsystem has been applied to a workstation, it performs very slowly when connecting to network resources. A network technician tests the link with a cable analyzer and notices that the workstation sends an excessive number of frames smaller than 64 bytes and also other meaningless frames. What is the possible cause of the problem?
Respuesta
  • corrupted NIC driver
  • corrupted application installation
  • cabling faults
  • Ethernet signal attenuation

Pregunta 183

Pregunta
Which two specialized troubleshooting tools can monitor the amount of traffic that passes through a switch? (Choose two.)
Respuesta
  • NAM
  • portable network analyzer
  • digital multimeter
  • DTX cable analyzer
  • TDR

Pregunta 184

Pregunta
A group of Windows PCs in a new subnet has been added to an Ethernet network. When testing the connectivity, a technician finds that these PCs can access local network resources but not the Internet resources. To troubleshoot the problem, the technician wants to initially confirm the IP address and DNS configurations on the PCs, and also verify connectivity to the local router. Which three Windows CLI commands and utilities will provide the necessary information? (Choose three.)
Respuesta
  • ping
  • nslookup
  • ipconfig
  • tracert
  • netsh interface ipv6 show neighbor
  • arp -a
  • telnet

Pregunta 185

Pregunta
A networked PC is having trouble accessing the Internet, but can print to a local printer and ping other computers in the area. Other computers on the same network are not having any issues. What is the problem?
Respuesta
  • The PC has a missing or incorrect default gateway
  • The link between the switch to which the PC connects and the default gateway router is down
  • The default gateway router does not have a default route
  • The switch port to which the PC connects has an incorrect VLAN configured

Pregunta 186

Pregunta
An internal corporate server can be accessed by internal PCs, but not by external Internet users that should have access. What could be the issue?
Respuesta
  • Static NAT has not been configured properly or at all.
  • The default gateway router for the server does not have a default route
  • The server does not have a private IP address assigned
  • The switch port to which the server connects has an incorrect VLAN configured
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