CCNA 2 Chapter 2 V4.0 Answers

1. A static route that points to the next hop IP will have what administrative distance and metric in the routing table?

administrative distance of 0 and metric of 0

administrative distance of 0 and metric of 1

administrative distance of 1 and metric of 0

administrative distance of 1 and metric of 1

 

2. What address can be used to summarize networks 172.16.1.0/24, 172.16.2.0/24, 172.16.3.0/24, and 172.16.4.0/24?

172.16.0.0/21

172.16.1.0/22

172.16.0.0 255.255.255.248

172.16.0.0 255.255.252.0

 

 

3.

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The routers in the diagram use the subnet assignments shown. What is the most efficient route summary that can be configured on Router3 to advertise the internal networks to the cloud?

192.1.1.0/26 and 192.1.1.64/27

192.1.1.128/25

192.1.1.0/23 and 192.1.1.64/23

192.1.1.0/24

192.1.1.0/25

192.1.1.0/24 and 192.1.1.64/24

 

4.

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Refer to the exhibit. What is the significance of the /8 in the route to the 10.0.0.0 network?

It indicates that there are 8 hops between this router and the 10.0.0.0 network.

It represents the time, in milliseconds, it takes for a ping to reply when sent to the 10.0.0.0 network.

It indicates that there are 8 subnets in the destination network to which the router can forward packets.

It indicates the number of consecutive bits, from the left, in the destination IP address of a packet that must match 10.0.0.0 to use that route.

 

5.

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Refer to the exhibit. How will packets destined to the 172.16.0.0 network be forwarded?

Router1 will perform recursive lookup and packet will exit S0/0.

Router1 will perform recursive lookup and packet will exit S0/1.

There is no matching interface associated with network 172.16.0.0 so packets will be dropped.

There is no matching interface associated with network 172.16.0.0 so packets will take gateway of last resort and exit out S0/2.

 

6. A network administrator enters the following command into Router1: ip route 192.168.0.0 255.255.255.0 S0/1/0. Router1 then receives a packet that is destined for 192.168.0.22/24. After finding the recently configured static route in the routing table, what does Router1 do next to process the packet?

drops the packet because the destination host is not listed in the routing table

looks up the MAC address of the S0/1/0 interface to determine the destination MAC address of the new frame

performs a recursive lookup for the IP address of the S0/1/0 interface before forwarding the packet

encapsulates the packet into a frame for the WAN link and forwards the packet out the S0/1/0 interface

 

7.

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Refer to the exhibit. Given the output in the exhibit, how would a clock rate be determined for this link?

The rate would be negotiated by both routers.

A rate would not be selected due to the DCE/DTE connection mismatch.

The rate configured on the DTE determines the clock rate.

The rate configured on the DCE determines the clock rate.

 

8.

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Refer to the exhibit. Which set of commands will configure static routes that will allow the WinterPark and the Altamonte routers to deliver packets from each LAN and direct all other traffic to the Internet?

WinterPark(config)# ip route 0.0.0.0 0.0.0.0 192.168.146.1
Altamonte(config)# 
ip route 10.0.234.0 255.255.255.0 192.168.146.2
Altamonte(config)# ip route 0.0.0.0 0.0.0.0 s0/1

WinterPark(config)# ip route 0.0.0.0 0.0.0.0 192.168.146.1
Altamonte(config)# ip route 10.0.234.0 255.255.255.0 192.168.146.2
Altamonte(config)# ip route 198.18.222.0 255.255.255.255 s0/1

WinterPark(config)# ip route 172.191.67.0 255.255.255.0 192.168.146.1
WinterPark(config)# ip route 0.0.0.0 0.0.0.0 192.168.146.1
Altamonte(config)# ip route 10.0.234.0 255.255.255.0 192.168.146.2

WinterPark(config)# ip route 172.191.67.0 255.255.255.0 192.168.146.1
Altamonte(config)# ip route 10.0.234.0 255.255.255.0 192.168.146.2
Altamonte(config)# ip route 0.0.0.0 0.0.0.0 s0/0

 

9. Hosts on two separate subnets cannot communicate. The network administrator suspects a missing route in one of the routing tables. Which three commands can be used to help troubleshoot Layer 3 connectivity issues? (Choose three.)

ping

show arp

traceroute

show ip route

show interface

show cdp neighbor detail

 

10.

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Refer to the exhibit. A company network engineer is assigned to establish connectivity between the two Ethernet networks so that hosts on the 10.1.1.0/24 subnet can contact hosts on the 10.1.2.0/24 subnet. The engineer has been told to use only static routing for these company routers. Which set of commands will establish connectivity between the two Ethernet networks?

R1(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.1
R2(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.2

R1(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.2
R2(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.1

R1(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.2
R2(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.1

R1(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.1
R2(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.2

R1(config)# ip route 0.0.0.0 0.0.0.0 10.1.2.1
R2(config)# ip route 0.0.0.0 0.0.0.0 10.1.1.1

 

11. Which of the following are displayed by the Router# show cdp neighbors command? (Choose three.)

load

platform

reliability

holdtime

local interface

 

12.

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Refer to the exhibit. What two commands are required to provide connectivity between the 192.168.1.0 and 10.0.0.0 networks without requiring recursive lookup? (Choose two.)

A(config)# ip route 10.0.0.0 255.0.0.0 s 0/1/0

A(config)# ip route 10.0.0.0 255.0.0.0 172.16.40.2

A (config)# ip route 10.0.0.0 255.0.0.0 s 0/0/0

B(config)# ip route 192.168.1.0 255.255.255.0 s 0/0/0

B (config)# ip route 192.168.1.0 255.255.255.0 172.16.40.1

B(config)# ip route 192.168.1.0 255.255.255.0 s 0/1/0

 

13.

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Refer to the exhibit. What two commands will change the next-hop address for the 10.0.0.0/8 network from 172.16.40.2 to 192.168.1.2? (Choose two.)

A(config)# no network 10.0.0.0 255.0.0.0 172.16.40.2

A(config)# no ip address 10.0.0.1 255.0.0.0 172.16.40.2

A(config)# no ip route 10.0.0.0 255.0.0.0 172.16.40.2

A(config)# ip route 10.0.0.0 255.0.0.0 s0/0/0

A(config)# ip route 10.0.0.0 255.0.0.0 192.168.1.2

 

14. What happens to a static route entry in a routing table when the outgoing interface is not available?

The route is removed from the table.

The router polls neighbors for a replacement route.

The route remains in the table because it was defined as static.

The router redirects the static route to compensate for the loss of the next hop device.

 

15. A router has one static route to each destination network. Which two scenarios would require an administrator to alter the static routes that are configured on that router? (Choose two.)

The destination network no longer exists.

The destination network is moved to a different interface on the same router.

The path between the source and destination is upgraded with a higher bandwidth link.

A topology change occurs where the existing next-hop address or exit interface is not accessible.

The remote destination network interface has to be down for 15 minutes of maintenance.

 

16. Why is it advisable to enter a next-hop IP address when creating a static route whose exit interface is an Ethernet network?

Adding the next-hop address eliminates the need for the router to do any lookups in the routing table before forwarding a packet.

In a multi-access network, the router cannot determine the next-hop MAC address for the Ethernet frame without a next-hop address.

Using a next-hop address in a static route provides a route with a lower metric.

In multi-access networks, using a next-hop address in a static route makes that route a candidate default route.

 

17. The output of the Router# show interfaces serial 0/1 command displays the following:
Serial0/1 is up, line protocol is down.
What is the most likely cause for the line protocol being down?

Serial0/1 is shutdown.

There is no cable connecting the routers.

The remote router is using serial 0/0.

No clock rate has been set.

 

18.

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Refer to the exhibit. Which static route should be configured on Router1 so that host A will be able to reach host B on the 172.16.0.0 network?

ip route 192.168.0.0 172.16.0.0 255.255.0.0

ip route 172.16.0.0 255.255.0.0 192.168.0.1

ip route 172.16.0.0 255.255.0.0 S0/0/1

ip route 172.16.0.0 255.255.0.0 S0/0/0

 

19. What two devices are responsible for converting the data from the WAN service provider into a form acceptable by the router? (Choose two).

the serial port of the router

a modem

a switch

the ethernet port of the router

a CSU/DSU device

a DTE device

 

20.

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Which of the following is true regarding CDP and the graphic shown?

CDP running on Router D will gather information about routers A, B, C, and E.

By default, Router A will receive CDP advertisements from routers B and C.

If routers D and E are running different routing protocols, they will not exchange CDP information.

Router E can use CDP to identify the IOS running on Router B.

 

21. Which two statements describe functions or characteristics of CDP? (Choose two.)

It starts up automatically and allows the device to detect directly connected neighbor devices that use CDP.

It operates at the network layer and allows two systems to learn about each other.

It creates a topology map of the entire network.

It allows systems to learn about each other even if different network layer protocols are configured.

It forwards advertisements about routes for faster convergence.

 

22. Which piece of information is available from examining the output of the command show ip interface brief?

Interface speed and duplex

Interface MTU

Errors

Interface MAC address

Interface IP address

CCNA 2 Chapter 1 V4.0 Answers

1. If a router cannot find a valid configuration file during the startup sequence, what will occur?

The startup sequence will reset.

The router will prompt the user for a response to enter setup mode.

The startup sequence will halt until a valid configuration file is acquired.

The router will generate a default configuration file based on the last valid configuration.

The router will monitor local traffic to determine routing protocol configuration requirements.

 

2.

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Refer to the exhibit. The network administrator has configured the router with the interface IP addresses shown for the directly connected networks. Pings from the router to hosts on the connected networks or pings between router interfaces are not working. What is the most likely problem?

The destination networks do not exist.

The IP addresses on the router interfaces must be configured as network addresses and not host addresses.

The interfaces must be enabled with the no shutdown command.

Each interface must be configured with the clock rate command.

 

 

3.

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Refer to the exhibit. What can be concluded from the routing table output in the exhibit? (Choose two.)

This router only has two interfaces.

The router interfaces are not operational yet.

This router is configured to forward packets to remote networks.

The FastEthernet0/0 and Serial0/0/0 interfaces of this router were configured with an IP address and the no shutdown command.

An IP packet received by this router with a destination address of 198.18.9.1 will be forwarded out of the Serial0/0/0 interface.

 

4.

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Refer to the exhibit. The frame shown in the exhibit was received by the router. The router interfaces are operational. How will the router process this frame? (Choose two.)

The router will change the source and destination IP address in the packet before forwarding the frame.

The router will change the frame type to one supported by the WAN link before forwarding the frame.

The router will use the destination MAC address to determine which interface to forward the packet.

The router will look up the MAC address of the S0/0/0 interface in the ARP table and add it to the frame before forwarding.

The frame was received on the Fa0/0 interface of the router and will be switched to the S0/0/0 interface.

The frame was received on the S0/0/0 interface of the router and will be switched to the Fa0/0 interface.

 

5. Passwords can be used to restrict access to all or parts of the Cisco IOS. Select the modes and interfaces that can be protected with passwords. (Choose three.)

VTY interface

console interface

Ethernet interface

secret EXEC mode

privileged EXEC mode

router configuration mode

 

6. Which two statements correctly describe the components of a router? (Choose two.)

RAM permanently stores the configuration file used during the boot sequence.

ROM contains diagnostics executed on hardware modules.

NVRAM stores a backup copy of the IOS used during the boot sequence.

Flash memory does not lose its contents during a reboot.

ROM contains the most current and most complete version of the IOS.

Flash contains boot system commands to identify the location of the IOS

 

7.

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Refer to the exhibit. After host 2 is connected to the switch on the LAN, host 2 is unable to communicate with host 1. What is the cause of this problem?

The subnet mask of host 2 is incorrect.

Host 1 and host 2 are on different networks.

The switch needs an IP address that is not configured.

The router LAN interface and host 1 are on different networks.

The IP address of host 1 is on a different network than is the LAN interface of the router.

 

8. Which are functions of a router? (Choose three.)

packet switching

extension of network segments

segmentation of broadcast domains

selection of best path based on logical addressing

election of best path based on physical addressing

 

9.

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Refer to the exhibit. All routers have a route in its routing table to each network that is shown in the exhibit. Default routes have not been issued on these routers. What can be concluded about how packets are forwarded in this network? (Choose two.)

If RouterC receives a packet that is destined for 10.5.1.1, it will be forwarded out interface Fa0/0.

If RouterA receives a packet that is destined for 192.168.3.146, it will be forwarded out interface S0/0/1.

If RouterB receives a packet that is destined for 10.5.27.15, it will be forwarded out interface S0/0/1.

If RouterB receives a packet that is destined for 172.20.255.1, it will be forwarded out interface S0/0/0.

If RouterC receives a packet that is destined for 192.16.5.101, it will be forwarded out interface S0/0/1.

 

10.

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The serial connection shown in the graphic needs to be configured. Which configuration commands must be made on the Sydney router to establish connectivity with the Melbourne site? (Choose three.)

Sydney(config-if)# ip address 201.100.53.2 255.255.255.0

Sydney(config-if)# no shutdown

Sydney(config-if)# ip address 201.100.53.1 255.255.255.224

Sydney(config-if)# clock rate 56000

Sydney(config-if)# ip host Melbourne 201.100.53.2

 

11.

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Refer to the exhibit. What can be concluded from the output of the running-configuration of a router?

The passwords are encrypted.

The current configuration was saved to NVRAM.

The configuration that is shown will be the one used on the next reboot.

The commands that are displayed determine the current operation of the router.

 

12.

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Refer to the exhibit. Host A pings host B. When R4 accepts the ping into the Ethernet interface, what two pieces of header information are included? (Choose two.)

source IP address: 192.168.10.129

source IP address: BBBB.3333.5677

destination IP address: 192.168.10.33

destination IP address: 192.168.10.134

destination MAC address: 9999.DADC.1234

 

13. What is the outcome of entering these commands?

R1(config)# line vty 0 4
R1(config-line)# password check123
R1(config-line)# login

ensures that a password is entered before entering user EXEC mode

sets the password to be used for connecting to this router via Telnet

requires check123 to be entered before the configuration can be saved

creates a local user account for logging in to a router or switch

 

14. Which of the following is the correct flow of routines for a router startup?

load bootstrap, load IOS, apply configuration

load bootstrap, apply configuration, load IOS

load IOS, load bootstrap, apply configuration, check hardware

check hardware, apply configuration, load bootstrap, load IOS

 

15. What three processes does a router execute when it receives a packet from one network that is destined for another network? (Choose three.)

decapsulates the Layer 3 packet by stripping off the Layer 2 frame header

uses the destination MAC Address in the IP Header to look up the next-hop address in the routing table

leaves the Layer 2 frame header intact when decapsulating the Layer 3 packet

uses the destination IP Address in the IP header to look up the next-hop address in the routing table

encapsulates the Layer 3 packet into the new Layer 2 frame and forwards it out the exit interface

encapsulates the Layer 3 packet into a special Layer 1 frame and forwards it to the exit interface

 

16. The network administrator needs to connect two routers directly via their FastEthernet ports. What cable should the network administrator use?

straight-through

rollover

cross-over

serial

 

17. Which two statements describe characteristics of load balancing? (Choose two.)

Load balancing occurs when a router sends the same packet to different destination networks.

Load balancing occurs when a router sends the same packet to different destination networks.

Load balancing allows a router to forward packets over multiple paths to the same destination network.

Unequal cost load balancing is supported by EIGRP.

If multiple paths with different metrics to a destinations exist, the router cannot support load balancing.

 

18. What information about the router and its startup process can be gathered from the output of the show version command? (Choose three.)

the last restart method

the command buffer contents

the amount of NVRAM and FLASH used

the configuration register settings

the location from where the IOS loaded

 

19.

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Which interfaces in the exhibit could be used for a leased line WAN connection? (Choose two.)

1

2

3

4

5

6

 

20. From what location can a router load the Cisco IOS during the boot process? (Choose two.)

RAM

TFTP server

NVRAM

setup routine

Flash memory

terminal

 

21. A network administrator has just entered new configurations into Router1. Which command should be executed to save configuration changes to NVRAM?

Router1# copy running-config flash

Router1(config)# copy running-config flash

Router1# copy running-config startup-config

Router1(config)# copy running-config startup-config

Router1# copy startup-config running-config

Router1(config)# copy startup-config running-config

 

22. What is the default sequence for loading the configuration file?

NVRAM, FLASH, ROM

FLASH, TFTP,CONSOLE

NVRAM, TFTP, CONSOLE

FLASH, TFTP, ROM

 

23. What header address information does a router change in the information it receives from an attached Ethernet interface before information is transmitted out another interface?

only the Layer 2 source address

only the Layer 2 destination address

only the Layer 3 source address

only the Layer 3 destination address

the Layer 2 source and destination address

the Layer 3 source and destination address

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