思科网络学院 CCNA2 ERouting Chapter 2

Sian

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.
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Scoring Rule for:   correctness of response
2 points for Option 2


Assessment Item:
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.
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Scoring Rule for:   correctness of response
Option 1 and Option 4 are correct.


Assessment Item:

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
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Scoring Rule for:   correctness of response
Option 3 and Option 5 are correct.


Assessment Item:

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.
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Scoring Rule for:   correctness of response
2 points for Option 4


Assessment Item:

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
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Scoring Rule for:   correctness of response
2 points for Option 3




Assessment Item:
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
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Scoring Rule for:   correctness of response
2 points for Option 4



Assessment Item:
A router has one static route configured 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.
The remote destination network interface has to be down for 15 minutes of maintenance.
A topology change occurs where the existing next-hop address or exit interface is not
accessible.
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Scoring Rule for:   correctness of response
Option 1 and Option 5 are correct.


Assessment Item:

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
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Scoring Rule for:   correctness of response
Option 1 and Option 4 are correct.

Assessment Item:
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
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Scoring Rule for:   correctness of response
Option 2 and Option 5 are correct.


Assessment Item:
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
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Scoring Rule for:   correctness of response
2 points for Option 5


Assessment Item:

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.
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Scoring Rule for:   correctness of response
2 points for Option 4


Assessment Item:

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
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Scoring Rule for:   correctness of response
2 points for Option 5


Assessment Item:
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.
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Scoring Rule for:   correctness of response
2 points for Option 1


Assessment Item:

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
Reset
Scoring Rule for:   correctness of response
2 points for Option 1


Assessment Item:
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.
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Scoring Rule for:   correctness of response
2 points for Option 2


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

load
platform
reliability
holdtime
local interface
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Scoring Rule for:   correctness of response
Option 2, Option 4, and Option 5 are correct.


Assessment Item:

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
Reset
Scoring Rule for:   correctness of response
2 points for Option 4


Assessment Item:
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 controllers
show cdp neighbor
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Scoring Rule for:   correctness of response
Option 1, Option 3, and Option 4 are correct.


Assessment Item:
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
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Scoring Rule for:   correctness of response
2 points for Option 3

Assessment Item:

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.
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Scoring Rule for:   correctness of response
2 points for Option 1

Assessment Item:
Which address can be used to summarize networks 172.16.0.0/24 thru 172.16.7.0/24?

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
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Scoring Rule for:   correctness of response
2 points for Option 1




Assessment Item:
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.
Reset
Scoring Rule for:   correctness of response
2 points for Option 4