CCNA 5.1

Pregunta 1 de 139

1

What is a characteristic of a fault tolerant network?

Selecciona una de las siguientes respuestas posibles:

a network that protects confidential information from unauthorized access
a network that can expand quickly to support new users and applications without impacting the performance of the service delivered to existing users
a network that supports a mechanism for managing congestion and ensuring reliable delivery of content to all users
a network that recovers quickly when a failure occurs and depends on redundancy to limit the impact of a failure

Explicación

Pregunta 2 de 139

1

Three bank employees 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 corporate managers in branch offices. If QoS is implemented on this network, what will be the priorities from highest to lowest of the different data types?

Selecciona una de las siguientes respuestas posibles:

audio conference, financial transactions, web page
financial transactions, web page, audio conference
audio conference, web page, financial transactions
financial transactions, audio conference, web page

Explicación

Pregunta 3 de 139

1

What is a benefit of using cloud computing in networking?

Selecciona una de las siguientes respuestas posibles:

End users have the freedom to use personal tools to access information and communicate across a business network.
Network capabilities are extended without requiring investment in new infrastructure, personnel, or software.
Technology is integrated into every-day appliances allowing them to interconnect with other devices, making them more ‘smart’ or automated.
Home networking uses existing electrical wiring to connect devices to the network wherever there is an electrical outlet, saving the cost of installing data cables.

Explicación

Pregunta 4 de 139

1

What is the function of the shell in an OS?

Selecciona una de las siguientes respuestas posibles:

It interacts with the device hardware.
It interfaces between the users and the kernel.
It provides dedicated firewall services.
It provides the intrusion protection services for the device.

Explicación

Pregunta 5 de 139

1

Which connection provides a secure CLI session with encryption to a Cisco switch?

Selecciona una de las siguientes respuestas posibles:

a console connection
an AUX connection
a Telnet connection
an SSH connection

Explicación

Pregunta 6 de 139

1

A network technician is attempting to configure an interface by entering the following command: SanJose(config)# ip address 192.168.2.1 255.255.255.0. The command is rejected by the device. What is the reason for this?

Selecciona una de las siguientes respuestas posibles:

The command is being entered from the wrong mode of operation.
The command syntax is wrong.
The subnet mask information is incorrect.
The interface is shutdown and must be enabled before the switch will accept the IP address.

Explicación

Pregunta 7 de 139

1

An administrator uses the Ctrl-Shift-6 key combination on a switch after issuing the ping command. What is the purpose of using these keystrokes?

Selecciona una de las siguientes respuestas posibles:

to restart the ping process
to interrupt the ping process
to exit to a different configuration mode
to allow the user to complete the command

Explicación

Pregunta 8 de 139

1

Refer to the exhibit. A network administrator is configuring access control to switch SW1. If the administrator uses a console connection to connect to the switch, which password is needed to access user EXEC mode?

Selecciona una de las siguientes respuestas posibles:

letmein
secretin
lineconin
linevtyin

Explicación

Pregunta 9 de 139

1

On which switch interface would an administrator configure an IP address so that the switch can be managed remotely?

Selecciona una de las siguientes respuestas posibles:

FastEthernet0/1
VLAN 1
vty 0
console 0

Explicación

Pregunta 10 de 139

1

What protocol is responsible for controlling the size of segments and the rate at which segments are exchanged between a web client and a web server?

Selecciona una de las siguientes respuestas posibles:

TCP
IP
HTTP
Ethernet

Explicación

Pregunta 11 de 139

1

What is an advantage to using a protocol that is defined by an open standard?

Selecciona una de las siguientes respuestas posibles:

A company can monopolize the market.
The protocol can only be run on equipment from a specific vendor.
An open standard protocol is not controlled or regulated by standards organizations.
It encourages competition and promotes choices.

Explicación

Pregunta 12 de 139

1

What are two benefits of using a layered network model? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

It assists in protocol design.
It speeds up packet delivery.
It prevents designers from creating their own model.
It prevents technology in one layer from affecting other layers.
It ensures a device at one layer can function at the next higher layer.

Explicación

Pregunta 13 de 139

1

Which two OSI model layers have the same functionality as two layers of the TCP/IP model? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

data link
network
physical
session
transport

Explicación

Pregunta 14 de 139

1

Which name is assigned to the transport layer PDU?

Selecciona una de las siguientes respuestas posibles:

bits
data
frame
packet
segment

Explicación

Pregunta 15 de 139

1

A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?

Selecciona una de las siguientes respuestas posibles:

presentation layer
network layer
physical layer
data link layer

Explicación

Pregunta 16 de 139

1

A network administrator is measuring the transfer of bits across the company backbone for a mission critical financial application. The administrator notices that the network throughput appears lower than the bandwidth expected. Which three factors could influence the differences in throughput? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

the amount of traffic that is currently crossing the network
the sophistication of the encapsulation method applied to the data
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 bandwidth of the WAN connection to the Internet
the reliability of the gigabit Ethernet infrastructure of the backbone

Explicación

Pregunta 17 de 139

1

What is a characteristic of UTP cabling?

Selecciona una de las siguientes respuestas posibles:

cancellation
cladding
immunity to electrical hazards
woven copper braid or metallic foil

Explicación

Pregunta 18 de 139

1

What are two characteristics of fiber-optic cable? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

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 typically contains 4 pairs of fiber-optic wires.
It is more expensive than UTP cabling is.

Explicación

Pregunta 19 de 139

1

What is a characteristic of the LLC sublayer?

Selecciona una de las siguientes respuestas posibles:

It provides the logical addressing required that identifies the device.
It provides delimitation of data according to the physical signaling requirements of the medium.
It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media.
It defines software processes that provide services to the physical layer.

Explicación

Pregunta 20 de 139

1

A network team is comparing physical WAN topologies for connecting remote sites to a headquarters building. Which topology provides high availability and connects some, but not all, remote sites?

Selecciona una de las siguientes respuestas posibles:

mesh
partial mesh
hub and spoke
point-to-point

Explicación

Pregunta 21 de 139

1

What method is used to manage contention-based access on a wireless network?

Selecciona una de las siguientes respuestas posibles:

CSMA/CD
priority ordering
CSMA/CA
token passing

Explicación

Pregunta 22 de 139

1

What are the three primary functions provided by Layer 2 data encapsulation? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

error correction through a collision detection method
session control using port numbers
data link layer addressing
placement and removal of frames from the media
detection of errors through CRC calculations
delimiting groups of bits into frames
conversion of bits into data signals

Explicación

Pregunta 23 de 139

1

What will a host on an Ethernet network do if it receives a frame with a destination MAC address that does not match its own MAC address?

Selecciona una de las siguientes respuestas posibles:

It will discard the frame.
It will forward the frame to the next host.
It will remove the frame from the media.
It will strip off the data-link frame to check the destination IP address.

Explicación

Pregunta 24 de 139

1

Which frame forwarding method receives the entire frame and performs a CRC check to detect errors before forwarding the frame?

Selecciona una de las siguientes respuestas posibles:

cut-through switching
store-and-forward switching
fragment-free switching
fast-forward switching

Explicación

Pregunta 25 de 139

1

Refer to the exhibit. If host A sends an IP packet to host B, what will the destination address be in the frame when it leaves host A?

Selecciona una de las siguientes respuestas posibles:

DD:DD:DD:DD:DD:DD
172.168.10.99
CC:CC:CC:CC:CC:CC
172.168.10.65
BB:BB:BB:BB:BB:BB
AA:AA:AA:AA:AA:AA

Explicación

Pregunta 26 de 139

1

What addresses are mapped by ARP?

Selecciona una de las siguientes respuestas posibles:

destination MAC address to a destination IPv4 address
destination IPv4 address to the source MAC address
destination IPv4 address to the destination host name
destination MAC address to the source IPv4 address

Explicación

Pregunta 27 de 139

1

What are two services provided by the OSI network layer? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

performing error detection
routing packets toward the destination
encapsulating PDUs from the transport layer
placement of frames on the media
collision detection

Explicación

Pregunta 28 de 139

1

What are two functions of NVRAM? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

to store the routing table
to retain contents when power is removed
to store the startup configuration file
to contain the running configuration file
to store the ARP table

Explicación

Pregunta 29 de 139

1

Refer to the exhibit. What will be the result of entering this configuration the next time a network administrator connects a console cable to the router and no additional commands have been entered?

Selecciona una de las siguientes respuestas posibles:

The administrator will be required to enter Cisco123.
The administrator will be required to enter Cisco234.
The administrator will be required to enter Cisco789.
The administrator will be presented with the R1> prompt.

Explicación

Pregunta 30 de 139

1

What is the dotted decimal representation of the IPv4 address 11001011.00000000.01110001.11010011?

Selecciona una de las siguientes respuestas posibles:

192.0.2.199
198.51.100.201
203.0.113.211
209.165.201.223

Explicación

Pregunta 31 de 139

1

What are three characteristics of multicast transmission? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

The source address of a multicast transmission is in the range of 224.0.0.0 to 224.0.0.255.
A single packet can be sent to a group of hosts.
Multicast transmission can be used by routers to exchange routing information.
Routers will not forward multicast addresses in the range of 224.0.0.0 to 224.0.0.255.
Computers use multicast transmission to request IPv4 addresses.
Multicast messages map lower layer addresses to upper layer addresses.

Explicación

Pregunta 32 de 139

1

What are the three ranges of IP addresses that are reserved for internal private use? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

10.0.0.0/8
64.100.0.0/14
127.16.0.0/12
172.16.0.0/12
192.31.7.0/24
192.168.0.0/16

Explicación

Pregunta 33 de 139

1

What purpose does NAT64 serve in IPv6?

Selecciona una de las siguientes respuestas posibles:

It converts IPv6 packets into IPv4 packets.
It translates private IPv6 addresses into public IPv6 addresses.
It enables companies to use IPv6 unique local addresses in the network.
It converts regular IPv6 addresses into 64-bit addresses that can be used on the Internet.
It converts the 48-bit MAC address into a 64-bit host address that can be used for automatic host addressing.

Explicación

Pregunta 34 de 139

1

What is the most compressed representation of the IPv6 address 2001:0000:0000:abcd:0000:0000:0000:0001?

Selecciona una de las siguientes respuestas posibles:

2001:0:abcd::1
2001:0:0:abcd::1
2001::abcd::1
2001:0000:abcd::1
2001::abcd:0:1

Explicación

Pregunta 35 de 139

1

Which range of link-local addresses can be assigned to an IPv6-enabled interface?

Selecciona una de las siguientes respuestas posibles:

FEC0::/10
FDEE::/7
FE80::/10
FF00::/8

Explicación

Pregunta 36 de 139

1

How many valid host addresses are available on an IPv4 subnet that is configured with a /26 mask?

Selecciona una de las siguientes respuestas posibles:

254
190
192
62
64

Explicación

Pregunta 37 de 139

1

A site administrator has been told that a particular network at the site must accommodate 126 hosts. Which subnet mask would be used that contains the required number of host bits?

Selecciona una de las siguientes respuestas posibles:

255.255.255.0
255.255.255.128
255.255.255.224
255.255.255.240

Explicación

Pregunta 38 de 139

1

Which subnet would include the address 192.168.1.96 as a usable host address?

Selecciona una de las siguientes respuestas posibles:

192.168.1.64/26
192.168.1.32/27
192.168.1.32/28
192.168.1.64/29

Explicación

Pregunta 39 de 139

1

Which statement is true about variable-length subnet masking?

Selecciona una de las siguientes respuestas posibles:

Each subnet is the same size.
The size of each subnet may be different, depending on requirements.
Subnets may only be subnetted one additional time.
Bits are returned, rather than borrowed, to create additional subnets.

Explicación

Pregunta 40 de 139

1

Which scenario describes a function provided by the transport layer?

Selecciona una de las siguientes respuestas posibles:

A student is using a classroom VoIP phone to call home. The unique identifier burned into the phone is a transport layer address used to contact another network device on the same network.
A student is playing a short web-based movie with sound. The movie and sound are encoded within the transport layer header.
A student has two web browser windows open in order to access two web sites. The transport layer ensures the correct web page is delivered to the correct browser window.
A corporate worker is accessing a web server located on a corporate network. The transport layer formats the screen so the web page appears properly no matter what device is being used to view the web site.

Explicación

Pregunta 41 de 139

1

A user opens three browsers on the same PC to access www.cisco.com to search for certification course information. The Cisco web server sends a datagram as a reply to the request from one of the web browsers. Which information is used by the TCP/IP protocol stack in the PC to identify which of the three web browsers should receive the reply?

Selecciona una de las siguientes respuestas posibles:

the destination IP address
the destination port number
the source IP address
the source port number

Explicación

Pregunta 42 de 139

1

What are two ways that TCP uses the sequence numbers in a segment? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

to identify missing segments at the destination
to reassemble the segments at the remote location
to specify the order in which the segments travel from source to destination
to limit the number of segments that can be sent out of an interface at one time
to determine if the packet changed during transit

Explicación

Pregunta 43 de 139

1

Which two tasks are functions of the presentation layer? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

compression
addressing
encryption
session control
authentication

Explicación

Pregunta 44 de 139

1

What is a key characteristic of the peer-to-peer networking model?

Selecciona una de las siguientes respuestas posibles:

wireless networking
social networking without the Internet
network printing using a print server
resource sharing without a dedicated server

Explicación

Pregunta 45 de 139

1

A technician can ping the IP address of the web server of a remote company but cannot successfully ping the URL address of the same web server. Which software utility can the technician use to diagnose the problem?

Selecciona una de las siguientes respuestas posibles:

tracert
ipconfig
netstat
nslookup

Explicación

Pregunta 46 de 139

1

Which domain name would be an example of a top-level domain?

Selecciona una de las siguientes respuestas posibles:

www.cisco.com
cisco.com
.com
root.cisco.com

Explicación

Pregunta 47 de 139

1

A PC obtains its IP address from a DHCP server. If the PC is taken off the network for repair, what happens to the IP address configuration?

Selecciona una de las siguientes respuestas posibles:

The configuration is permanent and nothing changes.
The address lease is automatically renewed until the PC is returned.
The address is returned to the pool for reuse when the lease expires.
The configuration is held by the server to be reissued when the PC is returned.

Explicación

Pregunta 48 de 139

1

A wireless host needs to request an IP address. What protocol would be used to process the request?

Selecciona una de las siguientes respuestas posibles:

FTP
HTTP
DHCP
ICMP
SNMP

Explicación

Pregunta 49 de 139

1

Which example of malicious code would be classified as a Trojan horse?

Selecciona una de las siguientes respuestas posibles:

malware that was written to look like a video game
malware that requires manual user intervention to spread between systems
malware that attaches itself to a legitimate program and spreads to other programs when launched
malware that can automatically spread from one system to another by exploiting a vulnerability in the target

Explicación

Pregunta 50 de 139

1

When applied to a router, which command would help mitigate brute-force password attacks against the router?

Selecciona una de las siguientes respuestas posibles:

exec-timeout 30
service password-encryption
banner motd $Max failed logins = 5$
login block-for 60 attempts 5 within 60

Explicación

Pregunta 51 de 139

1

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?

Selecciona una de las siguientes respuestas posibles:

LAN
MAN
WAN
WLAN

Explicación

Pregunta 52 de 139

1

A home user is looking for an ISP connection that provides high speed digital transmission over regular phone lines. What ISP connection type should be used?

Selecciona una de las siguientes respuestas posibles:

DSL
dial-up
satellite
cell modem
cable modem

Explicación

Pregunta 53 de 139

1

How does quality of service help a network support a wide range of applications and services?

Selecciona una de las siguientes respuestas posibles:

by limiting the impact of a network failure
by allowing quick recovery from network failures
by providing mechanisms to manage congested network traffic
by providing the ability for the network to grow to accommodate new users

Explicación

Pregunta 54 de 139

1

On which switch interface would an administrator configure an IP address so that the switch can be managed remotely?

Selecciona una de las siguientes respuestas posibles:

FastEthernet0/1
VLAN 1
vty 0
console 0

Explicación

Pregunta 55 de 139

1

After making configuration changes on a Cisco switch, a network administrator issues a copy running-config startup-config command. What is the result of issuing this command?

Selecciona una de las siguientes respuestas posibles:

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.

Explicación

Pregunta 56 de 139

1

Refer to the exhibit. A network administrator is configuring access control to switch SW1. If the administrator has already logged into a Telnet session on the switch, which password is needed to access privileged EXEC mode?

Selecciona una de las siguientes respuestas posibles:

letmein
secretin
lineconin
linevtyin

Explicación

Pregunta 57 de 139

1

Which connection provides a secure CLI session with encryption to a Cisco switch?

Selecciona una de las siguientes respuestas posibles:

a console connection
an AUX connection
a Telnet connection
an SSH connection

Explicación

Pregunta 58 de 139

1

A network technician is attempting to configure an interface by entering the following command: SanJose(config)# ip address 192.168.2.1 255.255.255.0. The command is rejected by the device. What is the reason for this?

Selecciona una de las siguientes respuestas posibles:

a console connection
an AUX connection
a Telnet connection
an SSH connection

Explicación

Pregunta 59 de 139

1

A network technician is attempting to configure an interface by entering the following command: SanJose(config)# ip address 192.168.2.1 255.255.255.0. The command is rejected by the device. What is the reason for this?

Selecciona una de las siguientes respuestas posibles:

The command is being entered from the wrong mode of operation.
The command syntax is wrong.
The subnet mask information is incorrect.
The interface is shutdown and must be enabled before the switch will accept the IP address.

Explicación

Pregunta 60 de 139

1

What function does pressing the Tab key have when entering a command in IOS?

Selecciona una de las siguientes respuestas posibles:

It aborts the current command and returns to configuration mode.
It exits configuration mode and returns to user EXEC mode.
It moves the cursor to the beginning of the next line.
It completes the remainder of a partially typed word in a command.

Explicación

Pregunta 61 de 139

1

What protocol is responsible for controlling the size of segments and the rate at which segments are exchanged between a web client and a web server?

Selecciona una de las siguientes respuestas posibles:

TCP
IP
HTTP
Ethernet

Explicación

Pregunta 62 de 139

1

What layer is responsible for routing messages through an internetwork in the TCP/IP model?

Selecciona una de las siguientes respuestas posibles:

internet
transport
network access
session

Explicación

Pregunta 63 de 139

1

Which statement accurately describes a TCP/IP encapsulation process when a PC is sending data to the network?

Selecciona una de las siguientes respuestas posibles:

Data is sent from the internet layer to the network access layer.
Packets are sent from the network access layer to the transport layer.
Segments are sent from the transport layer to the internet layer.
Frames are sent from the network access layer to the internet layer.

Explicación

Pregunta 64 de 139

1

What unique address is embedded in an Ethernet NIC and used for communication on an Ethernet network?

Selecciona una de las siguientes respuestas posibles:

host address
IP address
MAC address
network address

Explicación

Pregunta 65 de 139

1

A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?

Selecciona una de las siguientes respuestas posibles:

presentation layer
network layer
physical layer
data link layer

Explicación

Pregunta 66 de 139

1

A network administrator is measuring the transfer of bits across the company backbone for a mission critical financial application. The administrator notices that the network throughput appears lower than the bandwidth expected. Which three factors could influence the differences in throughput? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

the amount of traffic that is currently crossing the network
the sophistication of the encapsulation method applied to the data
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 bandwidth of the WAN connection to the Internet
the reliability of the gigabit Ethernet infrastructure of the backbone

Explicación

Pregunta 67 de 139

1

Which procedure is used to reduce the effect of crosstalk in copper cables?

Selecciona una de las siguientes respuestas posibles:

requiring proper grounding connections
twisting opposing circuit wire pairs together
wrapping the bundle of wires with metallic shielding
designing a cable infrastructure to avoid crosstalk interference
avoiding sharp bends during installation

Explicación

Pregunta 68 de 139

1

What is a characteristic of the LLC sublayer?

Selecciona una de las siguientes respuestas posibles:

It provides the logical addressing required that identifies the device.
It provides delimitation of data according to the physical signaling requirements of the medium.
It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media.
It defines software processes that provide services to the physical layer.

Explicación

Pregunta 69 de 139

1

What method is used to manage contention-based access on a wireless network?

Selecciona una de las siguientes respuestas posibles:

CSMA/CD
priority ordering
CSMA/CA
token passing

Explicación

Pregunta 70 de 139

1

During the encapsulation process, what occurs at the data link layer for a PC connected to an Ethernet network?

Selecciona una de las siguientes respuestas posibles:

An IP address is added.
The logical address is added.
The physical address is added.
The process port number is added.

Explicación

Pregunta 71 de 139

1

What are the three primary functions provided by Layer 2 data encapsulation? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

error correction through a collision detection method
session control using port numbers
data link layer addressing
placement and removal of frames from the media
detection of errors through CRC calculations
delimiting groups of bits into frames
conversion of bits into data signals

Explicación

Pregunta 72 de 139

1

What are two characteristics of Ethernet MAC addresses? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

They are globally unique.
They are routable on the Internet.
They are expressed as 12 hexadecimal digits.
MAC addresses use a flexible hierarchical structure.
MAC addresses must be unique for both Ethernet and serial interfaces on a device.

Explicación

Pregunta 73 de 139

1

If a device receives an Ethernet frame of 60 bytes, what will it do?

Selecciona una de las siguientes respuestas posibles:

drop the frame
process the frame as it is
send an error message to the sending device
add random data bytes to make it 64 bytes long and then forward it

Explicación

Pregunta 74 de 139

1

What will a host on an Ethernet network do if it receives a frame with a destination MAC address that does not match its own MAC address?

Selecciona una de las siguientes respuestas posibles:

It will discard the frame.
It will forward the frame to the next host.
It will remove the frame from the media.
It will strip off the data-link frame to check the destination IP address.

Explicación

Pregunta 75 de 139

1

Under which two circumstances will a switch flood a frame out of every port except the port that the frame was received on? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

The frame has the broadcast address as the destination address.
The destination address is unknown to the switch.
The source address in the frame header is the broadcast address.
The destination address in the frame is a known unicast address.
The source address in the frame is a multicast address.

Explicación

Pregunta 76 de 139

1

Which switching method has the lowest level of latency?

Selecciona una de las siguientes respuestas posibles:

cut-through
store-and-forward
fragment-free
fast-forward

Explicación

Pregunta 77 de 139

1

Which two commands can be used on a Windows host to display the routing table? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

netstat -s
route print
show ip route
netstat -r
tracert

Explicación

Pregunta 78 de 139

1

Which two functions are primary functions of a router? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

packet forwarding
microsegmentation
domain name resolution
path selection
flow control

Explicación

Pregunta 79 de 139

1

What are the three ranges of IP addresses that are reserved for internal private use? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

10.0.0.0/8
64.100.0.0/14
127.16.0.0/12
172.16.0.0/12
192.31.7.0/24
192.168.0.0/16

Explicación

Pregunta 80 de 139

1

What purpose does NAT64 serve in IPv6?

Selecciona una de las siguientes respuestas posibles:

It converts IPv6 packets into IPv4 packets.
It translates private IPv6 addresses into public IPv6 addresses.
It enables companies to use IPv6 unique local addresses in the network.
It converts regular IPv6 addresses into 64-bit addresses that can be used on the Internet.
It converts the 48-bit MAC address into a 64-bit host address that can be used for automatic host addressing.

Explicación

Pregunta 81 de 139

1

What is the binary representation of 0xCA?

Selecciona una de las siguientes respuestas posibles:

10111010
11010101
11001010
11011010

Explicación

Pregunta 82 de 139

1

At a minimum, which address is required on IPv6-enabled interfaces?

Selecciona una de las siguientes respuestas posibles:

link-local
unique local
site local
global unicast

Explicación

Pregunta 83 de 139

1

Which service provides dynamic global IPv6 addressing to end devices without using a server that keeps a record of available IPv6 addresses?

Selecciona una de las siguientes respuestas posibles:

stateful DHCPv6
SLAAC
static IPv6 addressing
stateless DHCPv6

Explicación

Pregunta 84 de 139

1

What is the purpose of the command ping ::1?

Selecciona una de las siguientes respuestas posibles:

It tests the internal configuration of an IPv6 host.
It tests the broadcast capability of all hosts on the subnet.
It tests the multicast connectivity to all hosts on the subnet.
It tests the reachability of the default gateway for the network.

Explicación

Pregunta 85 de 139

1

What is the purpose of the command ping ::1?

Selecciona una de las siguientes respuestas posibles:

It tests the internal configuration of an IPv6 host.
It tests the broadcast capability of all hosts on the subnet.
It tests the multicast connectivity to all hosts on the subnet.
It tests the reachability of the default gateway for the network.

Explicación

Pregunta 86 de 139

1

Which subnet would include the address 192.168.1.96 as a usable host address?

Selecciona una de las siguientes respuestas posibles:

192.168.1.64/26
192.168.1.32/27
192.168.1.32/28
192.168.1.64/29

Explicación

Pregunta 87 de 139

1

A network administrator wants to have the same subnet mask for three subnetworks at a small site. The site has the following networks and numbers of devices:
Subnetwork A: IP phones – 10 addresses
Subnetwork B: PCs – 8 addresses
Subnetwork C: Printers – 2 addresses

What single subnet mask would be appropriate to use for the three subnetworks?

Selecciona una de las siguientes respuestas posibles:

255.255.255.0
255.255.255.240
255.255.255.248
255.255.255.252

Explicación

Pregunta 88 de 139

1

Which statement is true about variable-length subnet masking?

Selecciona una de las siguientes respuestas posibles:

Each subnet is the same size.
The size of each subnet may be different, depending on requirements.
Subnets may only be subnetted one additional time.
Bits are returned, rather than borrowed, to create additional subnets.

Explicación

Pregunta 89 de 139

1

What subnet mask is needed if an IPv4 network has 40 devices that need IP addresses and address space is not to be wasted?

Selecciona una de las siguientes respuestas posibles:

255.255.255.0
255.255.255.128
255.255.255.192
255.255.255.224
255.255.255.240

Explicación

Pregunta 90 de 139

1

What are two characteristics shared by TCP and UDP? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

default window size
connectionless communication
port numbering
3-way handshake
ability to to carry digitized voice
use of checksum

Explicación

Pregunta 91 de 139

1

Why are port numbers included in the TCP header of a segment?

Selecciona una de las siguientes respuestas posibles:

to indicate the correct router interface that should be used to forward a segment
to identify which switch ports should receive or forward the segment
to determine which Layer 3 protocol should be used to encapsulate the data
to enable a receiving host to forward the data to the appropriate application
to allow the receiving host to assemble the packet in the proper order

Explicación

Pregunta 92 de 139

1

Which two protocols operate at the highest layer of the TCP/IP protocol stack? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

DNS
Ethernet
IP
POP
UDP
TCP

Explicación

Pregunta 93 de 139

1

What is one difference between the client-server and peer-to-peer network models?

Selecciona una de las siguientes respuestas posibles:

Only in the client-server model can file transfers occur.
Every device in a peer-to-peer network can function as a client or a server.
A peer-to-peer network transfers data faster than a transfer using a client-server network.
A data transfer that uses a device serving in a client role requires that a dedicated server be present.

Explicación

Pregunta 94 de 139

1

Which networking model is being used when an author uploads one chapter document to a file server of a book publisher?

Selecciona una de las siguientes respuestas posibles:

peer-to-peer
master-slave
client/server
point-to-point

Explicación

Pregunta 95 de 139

1

What network service resolves the URL entered on a PC to the IP address of the destination server?

Selecciona una de las siguientes respuestas posibles:

DNS
DHCP
FTP
SNMP

Explicación

Pregunta 96 de 139

1

A network engineer is analyzing reports from a recently performed network baseline. Which situation would depict a possible latency issue?

Selecciona una de las siguientes respuestas posibles:

a change in the bandwidth according to the show interfaces output
a next-hop timeout from a traceroute
an increase in host-to-host ping response times
a change in the amount of RAM according to the show version output

Explicación

Pregunta 97 de 139

1

Which firewall feature is used to ensure that packets coming into a network are legitimate responses to requests initiated from internal hosts?

Selecciona una de las siguientes respuestas posibles:

stateful packet inspection
URL filtering
application filtering
packet filtering

Explicación

Pregunta 98 de 139

1

Rellena el espacio en blanco para completar el texto.

Fill in the blank.
During data communications, a host may need to send a single message to a specific group of destination hosts simultaneously. This message is in the form of a message.

Explicación

Pregunta 99 de 139

1

A medium-sized business is researching available options for connecting to the Internet. The company is looking for a high speed option with dedicated, symmetric access. Which connection type should the company choose?

Selecciona una de las siguientes respuestas posibles:

DSL
dialup
satellite
leased line
cable modem

Explicación

Pregunta 100 de 139

1

What is the purpose of having a converged network?

Selecciona una de las siguientes respuestas posibles:

to provide high speed connectivity to all end devices
to make sure that all types of data packets will be treated equally
to achieve fault tolerance and high availability of data network infrastructure devices
to reduce the cost of deploying and maintaining the communication infrastructure

Explicación

Pregunta 101 de 139

1

What characteristic of a network enables it to quickly grow to support new users and applications without impacting the performance of the service being delivered to existing users?

Selecciona una de las siguientes respuestas posibles:

reliability
scalability
quality of service
accessibility

Explicación

Pregunta 102 de 139

1

Which connection provides a secure CLI session with encryption to a Cisco switch?

Selecciona una de las siguientes respuestas posibles:

a console connection
an AUX connection
a Telnet connection
an SSH connection

Explicación

Pregunta 103 de 139

1

A network technician is attempting to configure an interface by entering the following command: SanJose(config)# ip address 192.168.2.1 255.255.255.0. The command is rejected by the device. What is the reason for this?

Selecciona una de las siguientes respuestas posibles:

The command is being entered from the wrong mode of operation.
The command syntax is wrong.
The subnet mask information is incorrect.
The interface is shutdown and must be enabled before the switch will accept the IP address.

Explicación

Pregunta 104 de 139

1

After several configuration changes are made to a router, the copy running-configuration startup-configuration command is issued. Where will the changes be stored?

Selecciona una de las siguientes respuestas posibles:

flash
ROM
NVRAM
RAM
the configuration register
a TFTP server

Explicación

Pregunta 105 de 139

1

Refer to the exhibit. From global configuration mode, an administrator is attempting to create a message-of-the-day banner by using the command banner motd V Authorized access only! Violators will be prosecuted! V When users log in using Telnet, the banner does not appear correctly. What is the problem?

Selecciona una de las siguientes respuestas posibles:

The banner message is too long.
The delimiting character appears in the banner message.
The symbol “!” signals the end of a banner message.
Message-of-the-day banners will only appear when a user logs in through the console port.

Explicación

Pregunta 106 de 139

1

What are three characteristics of an SVI? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

It is designed as a security protocol to protect switch ports.
It is not associated with any physical interface on a switch.
It is a special interface that allows connectivity by different types of media.
It is required to allow connectivity by any device at any location
It provides a means to remotely manage a switch.
It is associated with VLAN1 by default.

Explicación

Pregunta 107 de 139

1

A technician configures a switch with these commands:SwitchA(config)# interface vlan 1
SwitchA(config-if)# ip address 192.168.1.1 255.255.255.0
SwitchA(config-if)# no shutdownWhat is the technician configuring?

Selecciona una de las siguientes respuestas posibles:

Telnet access
SVI
password encryption
physical switchport access

Explicación

Pregunta 108 de 139

1

In computer communication, what is the purpose of message encoding?

Selecciona una de las siguientes respuestas posibles:

to convert information to the appropriate form for transmission
to interpret information
to break large messages into smaller frames
to negotiate correct timing for successful communication

Explicación

Pregunta 109 de 139

1

What protocol is responsible for controlling the size of segments and the rate at which segments are exchanged between a web client and a web server?

Selecciona una de las siguientes respuestas posibles:

TCP
IP
HTTP
Ethernet

Explicación

Pregunta 110 de 139

1

What is the process of dividing a data stream into smaller pieces before transmission?

Selecciona una de las siguientes respuestas posibles:

segmentation
encapsulation
encoding
flow control

Explicación

Pregunta 111 de 139

1

When IPv4 addressing is manually configured on a web server, which property of the IPv4 configuration identifies the network and host portion for an IPv4 address?

Selecciona una de las siguientes respuestas posibles:

DNS server address
subnet mask
default gateway
DHCP server address

Explicación

Pregunta 112 de 139

1

A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?

Selecciona una de las siguientes respuestas posibles:

presentation layer
network layer
physical layer
data link layer

Explicación

Pregunta 113 de 139

1

A network engineer is measuring the transfer of bits across the company backbone for a mission critical database application. The engineer notices that the network throughput appears lower than the bandwidth expected. Which three factors could influence the differences in throughput? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

the amount of traffic that is currently crossing the network
the sophistication of the encapsulation method applied to the data
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 bandwidth of the WAN connection to the Internet
the reliability of the gigabit Ethernet infrastructure of the backbone

Explicación

Pregunta 114 de 139

1

Which type of UTP cable is used to connect a PC to a switch port?

Selecciona una de las siguientes respuestas posibles:

console
rollover
crossover
straight-through

Explicación

Pregunta 115 de 139

1

What is a characteristic of the LLC sublayer?

Selecciona una de las siguientes respuestas posibles:

It provides the logical addressing required that identifies the device.
It provides delimitation of data according to the physical signaling requirements of the medium.
It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media.
It defines software processes that provide services to the physical layer.

Explicación

Pregunta 116 de 139

1

What are the three primary functions provided by Layer 2 data encapsulation? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

error correction through a collision detection method
session control using port numbers
data link layer addressing
placement and removal of frames from the media
detection of errors through CRC calculations
delimiting groups of bits into frames
conversion of bits into data signals

Explicación

Pregunta 117 de 139

1

What will a host on an Ethernet network do if it receives a frame with a destination MAC address that does not match its own MAC address?

Selecciona una de las siguientes respuestas posibles:

It will discard the frame.
It will forward the frame to the next host.
It will remove the frame from the media.
It will strip off the data-link frame to check the destination IP address.

Explicación

Pregunta 118 de 139

1

What are two actions performed by a Cisco switch? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

building a routing table that is based on the first IP address in the frame header
using the source MAC addresses of frames to build and maintain a MAC address table
forwarding frames with unknown destination IP addresses to the default gateway
utilizing the MAC address table to forward frames via the destination MAC address
examining the destination MAC address to add new entries to the MAC address table

Explicación

Pregunta 119 de 139

1

What are two examples of the cut-through switching method? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

store-and-forward switching
fast-forward switching
CRC switching
fragment-free switching
QOS switching

Explicación

Pregunta 120 de 139

1

What information is added during encapsulation at OSI Layer 3?

Selecciona una de las siguientes respuestas posibles:

source and destination MAC
source and destination application protocol
source and destination port number
source and destination IP address

Explicación

Pregunta 121 de 139

1

Refer to the exhibit. The network administrator for a small advertising company has chosen to use the 192.168.5.96/27 network for internal LAN addressing. As shown in the exhibit, a static IP address is assigned to the company web server. However, the web server cannot access the Internet. The administrator verifies that local workstations with IP addresses that are assigned by a DHCP server can access the Internet, and the web server is able to ping local workstations. Which component is incorrectly configured?

Selecciona una de las siguientes respuestas posibles:

subnet mask
DNS address
host IP address
default gateway address

Explicación

Pregunta 122 de 139

1

Why does a Layer 3 device perform the ANDing process on a destination IP address and subnet mask?

Selecciona una de las siguientes respuestas posibles:

to identify the broadcast address of the destination network
to identify the host address of the destination host
to identify faulty frames
to identify the network address of the destination network

Explicación

Pregunta 123 de 139

1

What are the three ranges of IP addresses that are reserved for internal private use? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

10.0.0.0/8
64.100.0.0/14
127.16.0.0/12
172.16.0.0/12
192.31.7.0/24
192.168.0.0/16

Explicación

Pregunta 124 de 139

1

Which three addresses are valid public addresses? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

198.133.219.17
192.168.1.245
10.15.250.5
128.107.12.117
192.15.301.240
64.104.78.227

Explicación

Pregunta 125 de 139

1

What type of IPv6 address is FE80::1?

Selecciona una de las siguientes respuestas posibles:

loopback
link-local
multicast
global unicast

Explicación

Pregunta 126 de 139

1

Refer to the exhibit. On the basis of the output, which two statements about network connectivity are correct? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

There is connectivity between this device and the device at 192.168.100.1.
The connectivity between these two hosts allows for videoconferencing calls.
There are 4 hops between this device and the device at 192.168.100.1.
The average transmission time between the two hosts is 2 milliseconds.
This host does not have a default gateway configured.

Explicación

Pregunta 127 de 139

1

Which subnet would include the address 192.168.1.96 as a usable host address?

Selecciona una de las siguientes respuestas posibles:

92.168.1.64/26
192.168.1.32/27
192.168.1.32/28
192.168.1.64/29

Explicación

Pregunta 128 de 139

1

How many hosts are addressable on a network that has a mask of 255.255.255.248?

Selecciona una de las siguientes respuestas posibles:

2
6
8
14
16
254

Explicación

Pregunta 129 de 139

1

Which statement is true about variable-length subnet masking?

Selecciona una de las siguientes respuestas posibles:

Each subnet is the same size.
The size of each subnet may be different, depending on requirements.
Subnets may only be subnetted one additional time.
Bits are returned, rather than borrowed, to create additional subnets.

Explicación

Pregunta 130 de 139

1

Refer to the exhibit. Consider the IP address of 192.168.10.0/24 that has been assigned to a high school building. The largest network in this building has 100 devices. If 192.168.10.0 is the network number for the largest network, what would be the network number for the next largest network, which has 40 devices?

Selecciona una de las siguientes respuestas posibles:

192.168.10.0
192.168.10.128
192.168.10.192
192.168.10.224
192.168.10.240

Explicación

Pregunta 131 de 139

1

In what two situations would UDP be the preferred transport protocol over TCP? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

when applications need to guarantee that a packet arrives intact, in sequence, and unduplicated
when a faster delivery mechanism is needed
when delivery overhead is not an issue
when applications do not need to guarantee delivery of the data
when destination port numbers are dynamic

Explicación

Pregunta 132 de 139

1

What important information is added to the TCP/IP transport layer header to ensure communication and connectivity with a remote network device?

Selecciona una de las siguientes respuestas posibles:

timing and synchronization
destination and source port numbers
destination and source physical addresses
destination and source logical network addresses

Explicación

Pregunta 133 de 139

1

What is the TCP mechanism used in congestion avoidance?

Selecciona una de las siguientes respuestas posibles:

three-way handshake
socket pair
two-way handshake
sliding window

Explicación

Pregunta 134 de 139

1

Which three statements characterize UDP? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

UDP provides basic connectionless transport layer functions.
UDP provides connection-oriented, fast transport of data at Layer 3.
UDP relies on application layer protocols for error detection.
UDP is a low overhead protocol that does not provide sequencing or flow control mechanisms.
UDP relies on IP for error detection and recovery.
UDP provides sophisticated flow control mechanisms.

Explicación

Pregunta 135 de 139

1

Which two protocols operate at the highest layer of the TCP/IP protocol stack? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

DNS
Ethernet
IP
POP
TCP
UDP

Explicación

Pregunta 136 de 139

1

Which two roles can a computer assume in a peer-to-peer network where a file is being shared between two computers? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

client
master
server
slave
transient

Explicación

Pregunta 137 de 139

1

What is the function of the HTTP GET message?

Selecciona una de las siguientes respuestas posibles:

to request an HTML page from a web server
to send error information from a web server to a web client
to upload content to a web server from a web client
to retrieve client email from an email server using TCP port 110

Explicación

Pregunta 138 de 139

1

When planning for network growth, where in the network should packet captures take place to assess network traffic?

Selecciona una de las siguientes respuestas posibles:

on as many different network segments as possible
only at the edge of the network
between hosts and the default gateway
only on the busiest network segment

Explicación

Pregunta 139 de 139

1

Refer to the exhibit. An administrator is testing connectivity to a remote device with the IP address 10.1.1.1. What does the output of this command indicate?

Selecciona una de las siguientes respuestas posibles:

Connectivity to the remote device was successful.
A router along the path did not have a route to the destination.
A ping packet is being blocked by a security device along the path.
The connection timed out while waiting for a reply from the remote device.

	Creado por Rene Pfister hace más de 7 años

Test sobre CCNA 5.1, creado por Rene Pfister el 01/07/2017.

Pregunta 1 de 139

What is a characteristic of a fault tolerant network?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 2 de 139

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 3 de 139

What is a benefit of using cloud computing in networking?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 4 de 139

What is the function of the shell in an OS?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 5 de 139

Which connection provides a secure CLI session with encryption to a Cisco switch?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 6 de 139

A network technician is attempting to configure an interface by entering the following command: SanJose(config)# ip address 192.168.2.1 255.255.255.0. The command is rejected by the device. What is the reason for this?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 7 de 139

An administrator uses the Ctrl-Shift-6 key combination on a switch after issuing the ping command. What is the purpose of using these keystrokes?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 8 de 139

Refer to the exhibit. A network administrator is configuring access control to switch SW1. If the administrator uses a console connection to connect to the switch, which password is needed to access user EXEC mode?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 9 de 139

On which switch interface would an administrator configure an IP address so that the switch can be managed remotely?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 10 de 139

What protocol is responsible for controlling the size of segments and the rate at which segments are exchanged between a web client and a web server?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 11 de 139

What is an advantage to using a protocol that is defined by an open standard?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 12 de 139

What are two benefits of using a layered network model? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 13 de 139

Which two OSI model layers have the same functionality as two layers of the TCP/IP model? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 14 de 139

Which name is assigned to the transport layer PDU?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 15 de 139

A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 16 de 139

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 17 de 139

What is a characteristic of UTP cabling?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 18 de 139

What are two characteristics of fiber-optic cable? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 19 de 139

What is a characteristic of the LLC sublayer?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 20 de 139

A network team is comparing physical WAN topologies for connecting remote sites to a headquarters building. Which topology provides high availability and connects some, but not all, remote sites?

Selecciona una de las siguientes respuestas posibles:

Explicación