13789228
Pregunta 1
Pregunta
What is a function of the data link layer?
Respuesta
-
provides the formatting of data
-
provides for the exchange of data over a common local media
-
provides end-to-end delivery of data between hosts
-
provides delivery of data between two applications
Pregunta 2
Pregunta
Which communication tool allows real-time collaboration?
Respuesta
-
wiki
-
e-mail
-
weblog
-
instant messaging
Pregunta 3
Pregunta
A host is accessing a Web server on a remote network. Which three functions are performed by intermediary network devices during this conversation? (Choose three.)
Respuesta
-
regenerating data signals
-
acting as a client or a server
-
providing a channel over which messages travel
-
applying security settings to control the flow of data
-
notifying other devices when errors occur
-
serving as the source or destination of the messages
Pregunta 4
Pregunta
Refer to the exhibit. From which location did this router load the IOS?
Respuesta
-
flash memory
-
NVRAM?
-
RAM
-
ROM
-
A TFTP server
Pregunta 5
Pregunta
Refer to the exhibit. Which action will be successful?
Respuesta
-
PC1 can send a ping to 192.168.1.1
-
PC1 can send a ping to 192.168.1.254
-
PC2 can send a ping to 192.168.1.1
-
PC2 can send a ping to 192.168.1.254
Pregunta 6
Pregunta
Fill in the blank.
Port numbers ranging from 0 to 1023 are considered to be _______ ports.
Respuesta
-
WELL KNOWN
-
____
Pregunta 7
Pregunta
Fill in the blank.
ISOC, IANA, EIA, and IEEE represent _______ organizations which help to promote and maintain an open Internet.
Respuesta
-
standards
-
______
Pregunta 8
Pregunta
Refer to the exhibit. An administrator is trying to configure the switch but receives the error message that is displayed in the exhibit. What is the problem?
Respuesta
-
The entire command, configure terminal, must be used.
-
The administrator is already in global configuration mode.
-
The administrator must first enter privileged EXEC mode before issuing the command.
-
The administrator must connect via the console port to access global configuration mode.
Pregunta 9
Pregunta
A company is expanding its business to other countries. All branch offices must remain connected to corporate headquarters at all times. Which network technology is required to support this requirement?
Respuesta
-
LAN
-
MAN
-
WAN
-
WLAN
Pregunta 10
Pregunta
A network administrator is upgrading a small business network to give high priority to real-time applications traffic. What two types of network services is the network administrator trying to accommodate? (Choose two.)
Respuesta
-
SNMP
-
instant messaging
-
voice
-
FTP
-
video
Pregunta 11
Pregunta
Which IPv4 address can be pinged to test the internal TCP/IP operation of a host?
Respuesta
-
0.0.0.0
-
0.0.0.1
-
127.0.0.1
-
192.168.1.1
-
255.255.255.255
Pregunta 12
Pregunta
What three application layer protocols are part of the TCP/IP protocol suite?
(Choose three.)
Respuesta
-
ARP
-
DHCP
-
DNS
-
FTP
-
NAT
-
PPP
Pregunta 13
Pregunta
Which two protocols function at the internet layer? (Choose two)
Respuesta
-
ARP
-
BOOTP
-
ICMP
-
IP
-
PPP
Pregunta 14
Pregunta
Which publicly available resources describe protocols, processes, and technologies for the Internet but do not give implementation details?
Respuesta
-
Request for Comments
-
IRTF research papers
-
protocol models IEEE standards
-
IEEE standards
Pregunta 15
Pregunta
Which address on a PC does not change, even if the PC is moved to a different network?
Respuesta
-
IP address
-
default gateway address
-
MAC address
-
logical address
Pregunta 16
Pregunta
What is the protocol that is used to discover a physical address from a known logical address and what message type does it use?
Respuesta
-
ARP, multicast
-
DNS, unicast
-
DNS, broadcast
-
ARP, broadcast
-
PING, multicast
-
PING, broadcast
Pregunta 17
Pregunta
What will happen if the default gateway address is incorrectly configured on a host?
Respuesta
-
The host cannot communicate with other hosts in the local network.
-
The switch will not forward packets initiated by the host.
-
The host will have to use ARP to determine the correct address of the default gateway.
-
The host cannot communicate with hosts in other networks.
-
A ping from the host to 127.0.0.1 would not be successful.
Pregunta 18
Pregunta
What is an important function of the physical layer of the OSI model?
Respuesta
-
It accepts frames from the physical media.
-
It encapsulates upper layer data into frames.
-
It defines the media access method performed by the hardware interface.
-
It encodes frames into electrical, optical, or radio wave signals.
Pregunta 19
Pregunta
Which two statements describe the characteristics of fiber-optic cabling? (Choose two.)
Respuesta
-
Fiber-optic cabling does not conduct electricity.
-
Fiber-optic cabling has high signal loss.
-
Fiber-optic cabling is primarily used as backbone cabling.
-
Multimode fiber-optic cabling carries signals from multiple sending devices.
-
Fiber-optic cabling uses LEDs for single-mode cab?les and laser technology for multimode cables.
Pregunta 20
Pregunta
What is contained in the trailer of a data-link frame?
Respuesta
-
error detection
-
logical address
-
physical address
-
data
Pregunta 21
Pregunta
Refer to the exhibit. A ping to PC3 is issued from PC0, PC1, and PC2 in this exact order. Which MAC addresses will be contained in the S1 MAC address table that is associated with the Fa0/1 port?
Respuesta
-
just PC0 and PC1 MAC addresses
-
just the PC0 MAC address
-
PC0, PC1, and PC2 MAC addresses
-
just the PC1 MAC address
-
just the PC2 MAC address
Pregunta 22
Pregunta
How does a Layer 3 switch differ from a Layer 2 switch?
Respuesta
-
A Layer 3 switch supports VLANs, but a Layer 2 switch does not.
-
An IP address can be assigned to a physical port of a Layer 3 switch. However, this is not supported in Layer 2 switches.
-
A Layer 3 switch maintains an IP address table instead of a MAC address table.
-
A Layer 3 switch learns the MAC addresses that are associated with each of its ports. However, a Layer 2 switch does not.
Pregunta 23
Pregunta
What is the purpose of the routing process?
Respuesta
-
to encapsulate data that is used to communicate across a network
-
to select the paths that are used to direct traffic to destination networks
-
to convert a URL name into an IP address
-
to provide secure Internet file transfer
-
to forward traffic on the basis of MAC addresses
Pregunta 24
Pregunta
Which technology provides a solution to IPv4 address depletion by allowing multiple devices to share one public IP address?
Respuesta
-
ARP
-
DNS
-
NAT
-
SMB
-
DHCP
-
HTTP
Pregunta 25
Pregunta
Refer to the exhibit. Consider the IP address configuration shown from PC1. What is a description of the default gateway address?
Respuesta
-
It is the IP address of the Router1 interface that connects the company to the Internet.
-
It is the IP address of the Router1 interface that connects the PC1 LAN to Router1.
-
It is the IP address of Switch1 that connects PC1 to other devices on the same LAN.
-
It is the IP address of the ISP network device located in the cloud.
Pregunta 26
Pregunta
Which of the following are primary functions of a router? (Choose two.)
Respuesta
-
packet switching*
-
microsegmentation
-
domain name resolution
-
path selection
-
flow control
Pregunta 27
Pregunta
Which two statements correctly describe a router memory type and its
contents? (Choose two.)
Respuesta
-
ROM is nonvolatile and contains basic diagnostic software.
-
FLASH is nonvolatile and contains a limited portion of the IOS .
-
ROM is nonvolatile and stores the running IOS.
-
RAM is volatile and stores the IP routing table.
-
NVRAM is nonvolatile and stores other system files.
Pregunta 28
Pregunta
In which default order will a router search for startup configuration information?
Respuesta
-
NVRAM, RAM, TFTP
-
NVRAM, TFTP, setup mode
-
setup mode, NVRAM, TFTP
-
TFTP, ROM, NVRAM
-
flash, ROM, setup mode
Pregunta 29
Pregunta
What happens when part of an Internet VoIP transmission is not delivered to the destination?
Respuesta
-
A delivery failure message is sent to the source host.
-
The part of the VoIP transmission that was lost is re-sent.
-
The entire transmission is re-sent.
-
The transmission continues without the missing portion.
Pregunta 30
Pregunta
Which three IP addresses are private ? (Choose three.)
Respuesta
-
10.172.168.1
-
172.32.5.2
-
192.167.10.10
-
172.20.4.4
-
192.168.5.254
-
224.6.6.6
Pregunta 31
Pregunta
How many bits make up the single IPv6 hextet :10CD:?
Respuesta
-
4
-
8
-
16
-
32
Pregunta 32
Pregunta
What is the effect of configuring the ipv6 unicast-routing command on a
router?
Respuesta
-
to assign the router to the all-nodes multicast group
-
to enable the router as an IPv6 router
-
to permit only unicast packets on the router
-
to prevent the router from joining the all-routers multicast group
Pregunta 33
Pregunta
Which group of IPv6 addresses cannot be allocated as a host source address?
Respuesta
-
FEC0::/10?
-
FDFF::/7?
-
FEBF::/10?
-
FF00::/8*
Pregunta 34
Pregunta
What is the purpose of ICMP messages?
Respuesta
-
to inform routers about network topology changes
-
to ensure the delivery of an IP packet
-
to provide feedback of IP packet transmissions
-
to monitor the process of a domain name to IP address resolution
Pregunta 35
Pregunta
Refer to the exhibit. A technician has configured a user workstation with the IP
address and default subnet masks that are shown. Although the user can access all local LAN resources, the user cannot access any Internet sites by using either FQDN or IP addresses. Based upon the exhibit, what could account for this failure?
Respuesta
-
The DNS server addresses are incorrect.
-
The default gateway address in incorrect.
-
The wrong subnet mask was assigned to the workstation.
-
The workstation is not in the same network as the DNS servers.
Pregunta 36
Pregunta
A network administrator needs to monitor network traffic to and from servers in a data center. Which features of an IP addressing scheme should be applied to these devices?
Respuesta
-
random static addresses to improve security
-
addresses from different subnets for redundancy
-
predictable static IP addresses for easier identification
-
dynamic addresses to reduce the probability of duplicate addresses
Pregunta 37
Pregunta
Refer to the exhibit. Which IP addressing scheme should be changed?
Respuesta
-
Site 1
-
Site 2
-
Site 3
-
Site 4
Pregunta 38
Pregunta
Which two notations are useable nibble boundaries when subnetting in IPv6?
(Choose two.)
Respuesta
-
/62
-
/64
-
/66
-
/68
-
/70
Pregunta 39
Pregunta
A host PC has just booted and is attempting to lease an address through
DHCP. Which two messages will the client typically broadcast on the network? (Choose two.)
Respuesta
-
DHCPDISCOVER
-
DHCPOFFER
-
DHCPREQUEST
-
DHCPACK
-
DHCPNACK
Pregunta 40
Pregunta
What is the purpose of the network security accounting function?
Respuesta
-
to require users to prove who they are
-
to determine which resources a user can access
-
to keep track of the actions of a user
-
to provide challenge and response questions
Pregunta 41
Pregunta
Refer to the exhibit. The network administrator enters these commands into the R1 router:
R1# copy running-config tftp
Address or name of remote host [ ]?
When the router prompts for an address or remote host name, what IP address should the administrator enter at the prompt?
Respuesta
-
192.168.9.254
-
192.168.10.1
-
192.168.10.2
-
192.168.11.252
-
192.168.11.254
Pregunta 42
Pregunta
What two preconfigured settings that affect security are found on most new wireless routers? (Choose two.)
Respuesta
-
broadcast SSID
-
MAC filtering enabled
-
WEP encryption enabled
-
PSK authentication required
-
default administrator password
Pregunta 43
Pregunta
Which type of wireless security generates dynamic encryption keys each time a
client associates with an AP?
Respuesta
-
EAP
-
PSK
-
WEP
-
WPA
Pregunta 44
Pregunta
Fill in the blank.
TFTP* is a best-effort, connectionless application layer protocol that is used to transfer files.
Respuesta
-
--------
-
TFTP
Pregunta 45
Pregunta
Which two components are necessary for a wireless client to be installed on a WLAN? (Choose two.)
Respuesta
-
media
-
wireless NIC
-
custom adapter
-
crossover cable
-
wireless bridge
-
wireless client software
Pregunta 46
Pregunta
Consider the following range of addresses2001:0DB8:BC15:00A0:0000:: 2001:0DB8:BC15:00A1:0000:: 2001:0DB8:BC15:00A2:0000::
...
2001:0DB8:BC15:00AF:0000::
Respuesta
-
The prefix-length for the range of addresses is /60* .
-
----
Pregunta 47
Pregunta
A host is accessing an FTP server on a remote network. Which three functions are performed by intermediary network devices during this conversation? (Choose three.)
Respuesta
-
regenerating data signals
-
acting as a client or a server
-
providing a channel over which messages travel
-
applying security settings to control the flow of data
-
notifying other devices when errors occur
-
serving as the source or destination of the messages
Pregunta 48
Pregunta
When is a dial-up connection used to connect to an ISP?
Respuesta
-
when a cellular telephone provides the service
-
when a high-speed connection is provided over a cable TV network
-
when a satellite dish is used
-
when a regular telephone line is used
Pregunta 49
Pregunta
On a school network, students are surfing the web, searching the library database, and attending an audio conference with their sister school in Japan. If network traffic is prioritized with QoS, how will the traffic be classified from highest priority to lowest priority?
Respuesta
-
audio conference, database, HTTP
-
database, HTTP, audio conference
-
audio conference, HTTP, database
-
database, audio conference, HTTP
Pregunta 50
Pregunta
During normal operation, from which location do most Cisco routers run the IOS?
Respuesta
-
RAM
-
flash
-
NVRAM
-
disk drive
Pregunta 51
Pregunta
Which keys act as a hot key combination that is used to interrupt an IOS process?
Respuesta
-
Ctrl-Shift-X
-
Ctrl-Shift-6
-
Ctrl-Z
-
Ctrl-C
Pregunta 52
Pregunta
Refer to the exhibit. An administrator wants to change the name of a brand new
switch, using the hostname command as shown. What prompt will display after the command is issued??
Respuesta
-
HR Switch(config)#?
-
Switch(config)#?
-
HRSwitch(config)#?
-
HR(config)#?
-
Switch#
Pregunta 53
Pregunta
A technician uses the ping 127.0.0.1 command. What is the technician testing?
Respuesta
-
the TCP/IP stack on a network host
-
connectivity between two adjacent Cisco devices
-
connectivity between a PC and the default gateway
-
connectivity between two PCs on the same network
-
physical connectivity of a particular PC and the network
Pregunta 54
Pregunta
Which device should be used for enabling a host to communicate with another host on a different network?
Respuesta
-
switch
-
hub
-
router
-
host
Pregunta 55
Pregunta
A network technician is measuring the transfer of bits across the company backbone for a mission critical application. The technician notices that the network throughput appears lower than the bandwidth expected. Which three factors could influence the differences in throughput? (Choose three.)
Respuesta
-
the amount of traffic that is currently crossing the network
-
the type of traffic that is crossing the network
-
the latency that is created by the number of network devices that the data is crossing
-
the sophistication of the encapsulation method applied to the data
-
the bandwidth of the WAN connection to the Internet
-
the reliability of the gigabit Ethernet infrastructure of the backbone
Pregunta 56
Pregunta
Which characteristics describe fiber optic cable? (Choose two.)
Respuesta
-
It is not affected by EMI or RFI.
-
Each pair of cables is wrapped in metallic foil.
-
It combines the technique of cancellation, shielding and twisting to protect data.
-
It has a maximum speed of 100 Mbps.
-
It is the most expensive type of LAN cabling
Pregunta 57
Pregunta
What are two features of a physical, star network topology? (Choose two.)
Respuesta
-
It is straightforward to troubleshoot.
-
End devices are connected together by a bus.
-
All end devices are connected in a chain to each other.
-
It is easy to add and remove end devices.
-
Each end system is connected to its respective neighbor.
Pregunta 58
Pregunta
A frame is transmitted from one networking device to another. Why does the receiving device check the FCS field in the frame?
Respuesta
-
to determine the physical address of the sending device
-
to verify the network layer protocol information
-
to compare the interface media type between the sending and receiving ends
-
to check the frame for possible transmission errors
-
to verify that the frame destination matches the MAC address of the receiving device
Pregunta 59
Pregunta
What will a Layer 2 switch do when the destination MAC address of a received frame is not in the MAC table?
Respuesta
-
It initiates an ARP request.
-
It broadcasts the frame out of all ports on the switch.
-
It notifies the sending host that the frame cannot be delivered.
-
It forwards the frame out of all ports except for the port at which the frame was received.
Pregunta 60
Pregunta
Which parameter does the router use to choose the path to the destination when there are multiple routes available?
Respuesta
-
the lower metric value that is associated with the destination network
-
the lower gateway IP address to get to the destination network
-
the higher metric value that is associated with the destination network
-
the higher gateway IP address to get to the destination network
Pregunta 61
Pregunta
Which two statements describe the functions or characteristics of ROM in a router? (Choose two.)
Respuesta
-
stores routing tables
-
allows software to be updated without replacing pluggable chips on the motherboard
-
maintains instructions for POST diagnostics
-
holds ARP cache
-
stores bootstrap program
Pregunta 62
Pregunta
Which statement describes a characteristic of the Cisco router management ports?
Respuesta
-
A console port is used for remote management of the router.
-
A console port is not used for packet forwarding.
-
Serial and DSL interfaces are types of management ports.
-
Each Cisco router has a LED indicator to provide information about the status of the management ports.
Pregunta 63
Pregunta
What happens when part of an Internet radio transmission is not delivered to the destination?
Respuesta
-
A delivery failure message is sent to the source host.
-
The part of the radio transmission that was lost is re-sent.
-
The entire transmission is re-sent.
-
The transmission continues without the missing portion.
Pregunta 64
Pregunta
What types of addresses make up the majority of addresses within the /8 block IPv4 bit space?
Respuesta
-
private addresses
-
public addresses
-
multicast addresses
-
experimental addresses
Pregunta 65
Pregunta
Refer to the exhibit. What is the maximum TTL value that is used to reach the destination www.cisco.com??
Respuesta
-
11
-
12
-
13
-
14
Pregunta 66
Pregunta
A company has a network address of 192.168.1.64 with a subnet mask of 255.255.255.192. The company wants to create two subnetworks that would contain 10 hosts and 18 hosts respectively. Which two networks would achieve that? (Choose two.)
Respuesta
-
192.168.1.16/28
-
192.168.1.64/27
-
192.168.1.128/27
-
192.168.1.96/28
-
192.168.1.192/28
Pregunta 67
Pregunta
In a network that uses IPv4, what prefix would best fit a subnet containing 100
hosts?
Respuesta
-
/23
-
/24
-
/25
-
/26
Pregunta 68
Pregunta
Which protocol supports rapid delivery of streaming media?
Respuesta
-
Transmission Control Protocol
-
Real-Time Transport Protocol
-
Secure File Transfer Protocol
-
Video over Internet Protocol
Pregunta 69
Pregunta
Why would a network administrator use the tracert utility?
Respuesta
-
to determine the active TCP connections on a PC
-
to check information about a DNS name in the DNS server
-
to identify where a packet was lost or delayed on a network
-
to display the IP address, default gateway, and DNS server address for a PC
Pregunta 70
Pregunta
Refer to the exhibit. What is the significance of the asterisk (*) in the exhibited output?
Respuesta
-
The asterisk shows which file system was used to boot the system.
-
The asterisk designates which file system is the default file system.
-
An asterisk indicates that the file system is bootable.
-
An asterisk designates that the file system has at least one file that uses that file system.
Pregunta 71
Pregunta
Which WLAN security protocol generates a new dynamic key each time a client establishes a connection with the AP?
Respuesta
-
EAP
-
PSK
-
WEP
-
WPA
Pregunta 72
Pregunta
Fill in the blank.
Point-to-point communications where both devices can transmit and receive on the medium at the same time are known as _____
Respuesta
-
full-duplex
-
____
Pregunta 73
Pregunta
A host is accessing a Telnet server on a remote network. Which three functions are performed by intermediary network devices during this conversation? (Choose three.)
Respuesta
-
regenerating data signals
-
acting as a client or a server
-
providing a channel over which messages travel
-
applying security settings to control the flow of data
-
notifying other devices when errors occur
-
serving as the source or destination of the messages
Pregunta 74
Pregunta
Refer to the exhibit. Which area would most likely be an extranet for the company network that is shown?
Respuesta
-
area A
-
area B
-
area C
-
area D
Pregunta 75
Pregunta
Three office workers are using the corporate network. The first employee uses a web browser to view a company web page in order to read some announcements. The second employee accesses the corporate database to perform some financial transactions. The third employee participates in an important live audio conference with other office workers in branch offices. If QoS is implemented on this network, what will be the priorities from highest to lowest of the different data types?
Respuesta
-
audio conference, financial transactions, web page
-
financial transactions, web page, audio conference
-
audio conference, web page, financial transactions
-
financial transactions, audio conference, web page
Pregunta 76
Pregunta
During normal operation, from which location do most Cisco switches and routers run the IOS?
Respuesta
-
RAM
-
flash
-
NVRAM
-
disk drive
Pregunta 77
Pregunta
A network administrator is making changes to the configuration of a router.
After making the changes and verifying the results, the administrator issues the copy running-config startup-config command. What will happen after this command executes?
Respuesta
-
The configuration will be copied to flash.
-
The configuration will load when the router is restarted.
-
The new configuration file will replace the IOS file.
-
The changes will be lost when the router restarts.
Pregunta 78
Pregunta
What information does the loopback test provide?
Respuesta
-
The TCP/IP stack on the device is working correctly.
-
The device has end-to-end connectivity.
-
DHCP is working correctly.
-
The Ethernet cable is working correctly.
-
The device has the correct IP address on the network.
Pregunta 79
Pregunta
What happens when a switch receives a frame and the calculated CRC value is different than the value that is in the FCS field?
Respuesta
-
The switch places the new CRC value in the FCS field and forwards the frame.
-
The switch notifies the source of the bad frame.
-
The switch drops the frame.
-
The switch floods the frame to all ports except the port through which the frame arrived to notify the hosts of the error.
Pregunta 80
Pregunta
Which destination address is used in an ARP request frame?
Respuesta
-
0.0.0.0
-
255.255.255.255
-
FFFF.FFFF.FFFF*
-
127.0.0.1
-
01-00-5E-00-AA-23
Pregunta 81
Pregunta
What is the auto-MDIX feature on a switch?
Respuesta
-
the automatic configuration of an interface for 10/100/1000 Mb/s operation
-
the automatic configuration of an interface for a straight-through or a crossover Ethernet cable connection
-
the automatic configuration of full-duplex operation over a single Ethernet copper or optical cable
-
the ability to turn a switch interface on or off accordingly if an active connection is detected
Pregunta 82
Pregunta
What are the two main components of Cisco Express Forwarding (CEF)?
(Choose two.)
Respuesta
-
adjacency tables*
-
MAC-address tables
-
routing tables
-
forwarding information base (FIB)
-
ARP tables
Pregunta 83
Pregunta
Which statement describes the sequence of processes executed by a router when it receives a packet from a host to be delivered to a host on another network?
Respuesta
-
It receives the packet and forwards it directly to the destination host.
-
It de-encapsulates the packet, selects the appropriate path, and encapsulates the packet to forward it toward the destination host*
-
It de-encapsulates the packet and forwards it toward the destination host.
-
It selects the path and forwards it toward the destination host.
Pregunta 84
Pregunta
Refer to the exhibit. Router R1 has two interfaces that were configured with correct IP addresses and subnet masks. Why does the show ip route command output not display any information about the directly connected networks??
Respuesta
-
The directly connected networks have to be created manually to be displayed in the routing table.
-
The routing table will only display information about these networks when the router receives a packet.
-
The no shutdown command was not issued on these interfaces.
-
The gateway of last resort was not configured.
Pregunta 85
Pregunta
What happens when part of an Internet television transmission is not delivered
to the destination?
Respuesta
-
A delivery failure message is sent to the source host.
-
The part of the television transmission that was lost is re-sent.
-
The entire transmission is re-sent.
-
The transmission continues without the missing portion.*
Pregunta 86
Pregunta
Which three statements characterize the transport layer protocols? (Choose three.)
Respuesta
-
TCP and UDP port numbers are used by application layer protocols.
-
TCP uses port numbers to provide reliable transportation of IP packets.
-
UDP uses windowing and acknowledgments for reliable transfer of data.
-
TCP uses windowing and sequencing to provide reliable transfer of data.
-
TCP is a connection-oriented protocol. UDP is a connectionless protocol.
Pregunta 87
Pregunta
Which statement is true regarding the UDP client process during a session with a server?
Respuesta
-
Datagrams that arrive in a different order than that in which they were sent are not placed in order.
-
A session must be established before datagrams can be exchanged.
-
A three-way handshake takes place before the transmission of data begins.
-
Application servers have to use port numbers above 1024 in order to be UDP capable.
Pregunta 88
Pregunta
Which two components are configured via software in order for a PC to participate in a network environment? (Choose two.)
Respuesta
-
MAC address
-
IP address
-
kernel
-
shell
-
subnet mask
Pregunta 89
Pregunta
Which two reasons generally make DHCP the preferred method of assigning IP addresses to hosts on large networks? (Choose two.)
Respuesta
-
It eliminates most address configuration errors.
-
It ensures that addresses are only applied to devices that require a permanent address.
-
It guarantees that every device that needs an address will get one.
-
It provides an address only to devices that are authorized to be connected to the network.
-
It reduces the burden on network support staff.
Pregunta 90
Pregunta
What is the subnet address for the address 2001:DB8:BC15:A:12AB::1/64?
Respuesta
-
2001:DB8:BC15::0
-
2001:DB8:BC15:A::0
-
2001:DB8:BC15:A:1::1
-
2001:DB8:BC15:A:12::0
Pregunta 91
Pregunta
What is the purpose of the network security authentication function?
Respuesta
-
to require users to prove who they are
-
to determine which resources a user can access
-
to keep track of the actions of a user
-
to provide challenge and response questions
Pregunta 92
Pregunta
Which type of wireless security makes use of dynamic encryption keys each time a client associates with an AP?
Respuesta
-
EAP
-
PSK
-
WEP
-
WPA
Pregunta 93
Pregunta
Which field in an IPv4 packet header will typically stay the same during its transmission?
Respuesta
-
Packet Length
-
Destination Address
-
Flag
-
Time-to-Live
Pregunta 94
Pregunta
Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
Which IPv6 address is assigned to the Serial0/0/0 interface on RT2?
Respuesta
-
2001:db8:abc:1::1
-
2001:db8:abc:5::1
-
2001:db8:abc:10::15
-
2001:db8:abc:5::2
Pregunta 95
Pregunta
What must be configured to enable Cisco Express Forwarding (CEF) on most
Cisco devices that perform Layer 3 switching?
Respuesta
-
Manually configure next-hop Layer 2 addresses.
-
Issue the no shutdown command on routed ports.
-
CEF is enabled by default, so no configuration is necessary.
-
Manually map Layer 2 addresses to Layer 3 addresses to populate the forwarding information base (FIB).
Pregunta 96
Pregunta
What is the purpose of adjacency tables as used in Cisco Express Forwarding (CEF)?
Respuesta
-
to populate the forwarding information base (FIB)
-
to maintain Layer 2 next-hop addresses
-
to allow the separation of Layer 2 and Layer 3 decision making
-
to update the forwarding information base (FIB)
Pregunta 97
Pregunta
Which statement describes a characteristic of the network layer in the OSI
model?
Respuesta
-
It manages the data transport between the processes running on each host.
-
In the encapsulation process, it adds source and destination port numbers to the IP header.
-
When a packet arrives at the destination host, its IP header is checked by the network layer to determine where the packet has to be routed.
-
Its protocols specify the packet structure and processing used to carry the data from one host to another.
Pregunta 98
Pregunta
A user gets an IP address of 192.168.0.1 from the company network
administrator. A friend of the user at a different company gets the same IP address on another PC. How can two PCs use the same IP address and still reach the Internet, send and receive email, and search the web?
Respuesta
-
Both users must be using the same Internet Service Provider.
-
ISPs use Network Address Translation to change a user IP address into an address that can be used on the Internet.
-
ISPs use Domain Name Service to change a user IP address into a public IP address that can be used on the Internet.
-
Both users must be on the same network.
Pregunta 99
Pregunta
Why does HTTP use TCP as the transport layer protocol?
Respuesta
-
to ensure the fastest possible download speed
-
because HTTP is a best-effort protocol
-
because transmission errors can be tolerated easily
-
because HTTP requires reliable delivery
Pregunta 100
Pregunta
What is the valid most compressed format possible of the IPv6 address 2001:0DB8:0000:AB00:0000:0000:0000:1234?
Respuesta
-
2001:DB8:0:AB00::1234
-
2001:DB8:0:AB::1234
-
2001:DB8::AB00::1234
-
2001:DB8:0:AB:0:1234
Pregunta 101
Pregunta
What field content is used by ICMPv6 to determine that a packet has expired?
Respuesta
-
TTL field
-
CRC field
-
Hop Limit field
-
Time Exceeded field
Pregunta 102
Pregunta
Which firewall technique blocks incoming packets unless they are responses
to internal requests?
Respuesta
-
port filtering
-
stateful packet inspection
-
URL filtering
-
application filtering
Pregunta 103
Pregunta
A network technician is investigating network connectivity from a PC to a
remote host with the address 10.1.1.5. Which command issued on the PC will return to the technician the complete path to the remote host?
Respuesta
-
trace 10.1.1.5
-
traceroute 10.1.1.5
-
tracert 10.1.1.5ping 10.1.1.5
-
ping 10.1.1.5
Pregunta 104
Pregunta
Fill in the blank.
To prevent faulty network devices from carrying dangerous voltage levels, equipment must be grounded ___
Respuesta
-
correctly
-
_____
Pregunta 105
Pregunta
What is a possible hazard that can be caused by network cables in a fire?
Respuesta
-
The cable insulation could be flammable.
-
Users could be exposed to excessive voltage.
-
Network cables could be exposed to water.
-
The network cable could explode.
Pregunta 106
Pregunta
What device is commonly used to verify a UTP cable?
Respuesta
-
a multimeter
-
an Optical Time Domain Reflectometer
-
a cable tester
-
an ohmmeter
Pregunta 107
Pregunta
What needs to be checked when testing a UTP network cable?
Respuesta
-
capacitance
-
wire map
-
inductance
-
flexibility
Pregunta 108
Pregunta
Refer to the exhibit. A ping to PC2 is issued from PC0, PC1, and PC3 in this
exact order. Which MAC addresses will be contained in the S1 MAC address table that is associated with the Fa0/1 port?
Respuesta
-
just PC0 and PC1 MAC addresses
-
just the PC0 MAC address
-
PC0, PC1, and PC2 MAC addresses
-
just the PC1 MAC address
-
just the PC2 MAC address
Pregunta 109
Pregunta
Which function is provided by TCP?
Respuesta
-
data encapsulation
-
detection of missing packets
-
communication session control
-
path determination for data packets
Pregunta 110
Pregunta
What does a router use to determine where to send data it receives from the
network?
Respuesta
-
an ARP table
-
a routing table
-
the destination PC physical address
-
a switching table
Pregunta 111
Pregunta
Which router interface should be used for direct remote access to the router
via a modem?
Respuesta
-
an inband router interface
-
a console port
-
a serial WAN interface
-
an AUX port
Pregunta 112
Pregunta
A technician is configuring a router to allow for all forms of management access. As part of each different type of access, the technician is trying to type the command login. Which configuration mode should be entered to do this task?
Respuesta
-
user executive mode
-
global configuration mode
-
any line configuration mode
-
privileged EXEC mode
Pregunta 113
Pregunta
Which three statements characterize the transport layer protocols? (Choose three.)
Respuesta
-
TCP and UDP port numbers are used by application layer protocols.
-
TCP uses port numbers to provide reliable transportation of IP packets.
-
UDP uses windowing and acknowledgments for reliable transfer of data.
-
TCP uses windowing and sequencing to provide reliable transfer of data.
-
TCP is a connection-oriented protocol. UDP is a connectionless protocol.
Pregunta 114
Pregunta
Refer to the exhibit. A TCP segment from a server has been captured by Wireshark, which is running on a host. What acknowledgement number will the host return for the TCP segment that has been received?
Respuesta
-
2
-
21
-
250
-
306
-
2921
Pregunta 115
Pregunta
Which statement is true about an interface that is configured with the IPv6 address command?
Respuesta
-
IPv6 traffic-forwarding is enabled on the interface.
-
A link-local IPv6 address is automatically configured on the interface.
-
A global unicast IPv6 address is dynamically configured on the interface.
-
Any IPv4 addresses that are assigned to the interface are replaced with an IPv6 address.
Pregunta 116
Pregunta
Refer to the exhibit. An administrator must send a message to everyone on the router A network. What is the broadcast address for network 172.16.16.0/22?
Respuesta
-
172.16.16.255
-
172.16.20.255
-
172.16.19.255
-
172.16.23.255
-
172.16.255.255
Pregunta 117
Pregunta
A network administrator is variably subnetting a given block of IPv4 addresses.
Which combination of network addresses and prefix lengths will make the most efficient use of addresses when the need is for 2 subnets capable of supporting 10 hosts and 1 subnet that can support 6 hosts?
Respuesta
-
10.1.1.128/28 10.1.1.144/28 10.1.1.160/29
-
10.1.1.128/28 10.1.1.144/28 10.1.1.160/28
-
10.1.1.128/28 10.1.1.140/28 10.1.1.158/26
-
10.1.1.128/26 10.1.1.144/26 10.1.1.160/26
-
10.1.1.128/26 10.1.1.140/26 10.1.1.158/28
Pregunta 118
Pregunta
How many additional bits should be borrowed from a /26 subnet mask in order to create subnets for WAN links that need only 2 useable addresses?
Respuesta
-
2
-
3
-
4
-
5
-
6
Pregunta 119
Pregunta
Refer to the exhibit. The administrator configured the access to the console and the vty lines of a router. Which conclusion can be drawn from this configuration?
Respuesta
-
Unauthorized individuals can connect to the router via Telnet without entering a password.
-
Because the IOS includes the login command on the vty lines by default, access to the device via Telnet will require authentication.
-
Access to the vty lines will not be allowed via Telnet by anyone.
-
Because the login command was omitted, the password cisco command is not applied to the vty lines.
Pregunta 120
Pregunta
An administrator issued the service password-encryption command to apply encryption to the passwords configured for enable password, vty, and console lines. What will be the consequences if the administrator later issues the no service password-encryption command?
Respuesta
-
It will remove encryption from all passwords.
-
It will reverse only the vty and console password encryptions.
-
It will not reverse any encryption.
-
It will reverse only the enable password encryption.
Pregunta 121
Pregunta
After making configuration changes, a network administrator issues a copy running-config startup-config command in a Cisco switch. What is the result of issuing this command?
Respuesta
-
The new configuration will be stored in flash memory.
-
The new configuration will be loaded if the switch is restarted.
-
The current IOS file will be replaced with the newly configured file.
-
The configuration changes will be removed and the original configuration will be restored.
Pregunta 122
Pregunta
What are two features of ARP? (Choose two.)
Respuesta
-
If a host is ready to send a packet to a local destination device and it has the IP address but not the MAC address of the destination, it generates an ARP broadcast.*
-
An ARP request is sent to all devices on the Ethernet LAN and contains the IP address of the destination host and its multicast MAC address.
-
When a host is encapsulating a packet into a frame, it refers to the MAC address table to determine the mapping of IP addresses to MAC addresses.
-
If no device responds to the ARP request, then the originating node will broadcast the data packet to all devices on the network segment.
-
If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.
Pregunta 123
Pregunta
A network administrator is enabling services on a newly installed server. Which two statements describe how services are used on a server? (Choose two.)
Respuesta
-
Data sent with a service that uses TCP is received in the order the data was sent.
-
A port is considered to be open when it has an active server application that is assigned to it.
-
An individual server can have two services that are assigned to the same port number.
-
An individual server cannot have multiple services running at the same time.
-
Server security can be improved by closing ports that are associated with unused services.
Pregunta 124
Pregunta
Given the binary address of 11101100 00010001 00001100 00001010, which address does this represent in dotted decimal format?
Respuesta
-
234.17.10.9
-
234.16.12.10
-
236.17.12.6
-
236.17.12.10
Pregunta 125
Pregunta
A particular telnet site does not appear to be responding on a Windows 7 computer. What command could the technician use to show any cached DNS entries for this web page?
Respuesta
-
ipconfig /all
-
ipconfig /displaydns
-
arp -a
-
nslookup
Pregunta 126
Pregunta
Fill in the blank.
Network devices come in two physical configurations. Devices that have expansion slots that provide the flexibility to add new modules have a Modular
Respuesta
-
configuration.
-
____
Pregunta 127
Pregunta
Refer to the exhibit. What is the maximum TIL value that is used to reach the destination www.cisco.com?
Respuesta
-
11
-
12
-
13
-
14
Pregunta 128
Pregunta
Which statement is true about DHCP operation?
Respuesta
-
When a device that is configured to use DHCP boots, the client broadcasts a DHCPDISCOVER message to identify any available DHCP servers on the network.
-
A client must wait for lease expiration before it sends another DHCPREOUEST message.
-
The DHCPDISCOVER message contains the IP address and sub net masK to be assigned, the IP address of the DNS server, and the IP address of the default gateway.
-
If the client receives several DHCPOFFER messages from different servers, it sends a unicast DHCPREOUEST message to the server from which it chooses to obtain the IP information.
Pregunta 129
Pregunta
Which type of wireless security is easily compromised?
Respuesta
-
EAP
-
PSK
-
WEP
-
WPA
Pregunta 130
Pregunta
A network administrator notices that the throughput on the network appears
lower than expected when compared to the end-to-end network bandwidth. Which three factors can explain this difference? (Choose three.)
Respuesta
-
the amount of traffic
-
the type of data encapsulation in use
-
the type of traffic
-
the number and type of network devices that the data is crossing
-
he bandwidth of the connection to the ISP
-
the reliability of the network backbone
Pregunta 131
Pregunta
A host PC is attempting to lease an address through DHCP. What message is sent by the server to the client know it is able to use the provided IP information?
Respuesta
-
DHCPDISCOVER
-
DHCPOFFER
-
DHCPPREQUEST
-
DHCPACK
-
DHCPNACK
Pregunta 132
Pregunta
A network administrator is configuring access control to switch SW1. If the administrator uses console line to connect to the switch, which password is needed to access user EXEC mode?
Respuesta
-
letmein
-
secretin
-
lineconin
-
linevtyin
Pregunta 133
Pregunta
How many bits would need to be borrowed if a network admin were given the IP addressing scheme of 172.16.0.0/16 and needed no more than 16 subnet with equal number of hosts?
Respuesta
-
10
-
12
-
2
-
4
-
8
Pregunta 134
Pregunta
It will give 4 options about ping, the correct one is:
Respuesta
-
The PC2 will be able to ping 192.168.1.1
-
-------
Pregunta 135
Pregunta
Which statement best describes the operation of the File Transfer Protocol?
Respuesta
-
An FTP client uses a source port number of 21 and a randomly generated destination port number during the establishment of control traffic with an FTP Server.
-
An FTP client uses a source port number of 20 and a randomly generated destination port number during the establishment of data traffic with an FTP Server.
-
An FTP server uses a source port number of 20 and a randomly generated destination port number during the establishment of control traffic with an FTP client.
-
An FTP server uses a source port number of 21 and a randomly generated destination port number during the establishment of control traffic with an FTP client.
Pregunta 136
Pregunta
A client is establishing a TCP session with a server. How is the acknowledgment number in the response segment to the client determined?
Respuesta
-
The acknowledgment number field is modified by adding 1 to the randomly chosen initial sequence number in response to the client.
-
The acknowledgment number is set to 11 to signify an acknowledgment packet and synchronization packet back to the client.
-
The acknowledgment number field uses a random source port number in response to the client.
-
The acknowledgment number is set to 1 to signify an acknowledgment packet back to the client.
Pregunta 137
Pregunta
Why does layer 3 device perform the ANDing process on a destination IP and subnet Mask?
Respuesta
-
to identify host address and destination host;
-
to identify network address of destination host;
-
to identify faulty frames;
-
to identify broadcast address of destination network;
Pregunta 138
Pregunta
There was also a question about if you activated service password encryption
in the past and you prompt “no service password encryption” what password are modified ?
Respuesta
-
no password at all
-
password of the lines are in clear
-
login password
-
?
Pregunta 139
Pregunta
What type of communication rule would best describe CSMA/CD?
Respuesta
-
message encapsulation
-
flow control
-
message encoding
-
access method
Pregunta 140
Pregunta
What is the primary reason to subnet IPv6 prefixes?
Respuesta
-
to conserve IPv6 addresses
-
to avoid wasting IPv6 addresses
-
to conserve IPv6 prefixes
-
to create a hierarchical Layer 3 network design
Pregunta 141
Pregunta
Which statement describes data throughput?
Respuesta
-
It is the measure of the bits transferred across the media under perfect conditions
-
It is the measure of the bits transferred across the media over a given period of time.
-
It indicates the capacity of a particular medium to carry data.
-
It is the guaranteed data transfer rate offered by an ISP.
Pregunta 142
Pregunta
Fill in the blank. Use a number.
IPv4 multicast addresses are directly mapped to IEEE 802 (Ethernet) MAC addresses using the last _____ of the 28 available bits in the IPv4 multicast group
address.
Respuesta
-
4
-
-----
Pregunta 143
Pregunta
How could a faulty network device create a source of hazard for a user?
(Choose two.)
Respuesta
-
It could stop functioning.
-
It could explode.
-
It could apply dangerous voltage to other pieces of equipment.
-
It could produce an unsafe electromagnetic field.
-
It could apply dangerous voltage to itself.
Pregunta 144
Pregunta
What are three important considerations when planning the structure of an IP addressing scheme? (Choose three.)
Respuesta
-
implementing new services
-
conserving addresses
-
monitoring security and performance
-
documenting the network
-
providing and controlling access
-
preventing duplication of addresses
Pregunta 145
Pregunta
What is the metric value that is used to reach the 10.1.1.0 network in the following routing table entry? D 10.1.1.0/24 [90/2170112] via 209.165.200.226, 00:00:05, Serial0/0/0
Respuesta
-
24
-
90
-
05
-
2170112
Pregunta 146
Pregunta
Which two services or protocols use the preferred UDP protocol for fast transmission and low overhead? (Choose two)
Respuesta
-
VoIP
-
DNS
-
HTTP
-
FTP
-
POP3
Pregunta 147
Pregunta
What action does a DHCPv4 client take if it receives more than one DHCPOFFER from multiple DHCP servers?
Respuesta
-
It sends a DHCPREQUEST that identifies which lease offer the client is accepting.
-
It sends a DHCPNAK and begins the DHCP process over again.
-
It discards both offers and sends a new DHCPDISCOVER.
-
It accepts both DHCPOFFER messages and sends a DHCPACK.
Pregunta 148
Pregunta
To what legacy address class does the address 10.0.0.0 belong?
Respuesta
-
Class B
-
Class D
-
Class A
-
Class C
-
Class E
Pregunta 149
Pregunta
What type of communication medium is used with a wireless LAN connection?
Respuesta
-
radio waves
-
fiber
-
microwave
-
UTP
Pregunta 150
Pregunta
Which method of IPv6 prefix assignment relies on the prefix contained in RA messages?
Respuesta
-
EUI-64
-
static
-
SLAAC
-
stateful DHCPv6
Pregunta 151
Pregunta
What is a characteristic of DNS?
Respuesta
-
DNS servers can cache recent queries to reduce DNS query traffic.
-
DNS servers are programmed to drop requests for name translations that are not within their zone.
-
All DNS servers must maintain mappings for the entire DNS structure.
-
DNS relies on a hub-and-spoke topology with centralized servers.
Pregunta 152
Pregunta
What is the prefix for the host address 2001:DB8:BC15:A:12AB::1/64?
Respuesta
-
2001:DB8:BC15
-
2001:DB8:BC15:A
-
2001:DB8:BC15:A:1
-
2001:DB8:BC15:A:12
Pregunta 153
Pregunta
What information is maintained in the CEF adjacency table?
Respuesta
-
Layer 2 next hops
-
MAC address to IPv4 address mappings
-
IP address to interface mappings
-
the IP addresses of all neighboring routers
Pregunta 154
Pregunta
Which command can an administrator issue on a Cisco router to send debug
messages to the vty lines?
Respuesta
-
terminal monitor
-
logging console
-
logging buffered
-
logging synchronous
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