Ccna routing and Switching Complete Study Guide

A. /27

B. /28

C. /29

D. /30

E. /31

2.  In the network shown in the diagram, how many computers could be in Network B?

192.168.10.64/29

192.168.10.0/27

Network A

Network B

.65

.1

.73

.66

.67

192.168.10.48/28

.50

.51

Network D

Network E

.2

.3

.34

.35

.74

.33

.49

Network C

192.168.10.72/30

192.168.10.32/28

A. 6

B. 12

C. 14

D. 30

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200

 

Chapter 5 

■

  VLSMs, Summarization, and Troubleshooting TCP/IP 

3.  In the following diagram, in order to have IP addressing that’s as efficient as possible, 

which network should use a /29 mask?

30 hosts

Network B

20 hosts

Network C

6 hosts

Network D

14 hosts

Network A

Fa0/0

Fa0/0

Fa0/0

2 hosts

Network F

2 hosts

Network H

2 hosts

Network E

2 hosts

Network G

Lab D

Fa0/0

Lab E

Lab A

Lab B

A. A

B. B

C. C

D. D

4.  To use VLSM, what capability must the routing protocols in use possess?

A.  Support for multicast

B.  Multiprotocol support

C.  Transmission of subnet mask information

D.  Support for unequal load balancing

5.  What summary address would cover all the networks shown and advertise a single, efficient 

route to Router B that won’t advertise more networks than needed?

172.16.1.0/24

172.16.10.0/24

172.16.5.0/24

172.16.15.0/24

172.16.7.0/24

172.16.11.0/24

172.16.6.0/24

Router B

?

A. 172.16.0.0/24

B. 172.16.1.0/24

C. 172.16.0.0/24

D. 172.16.0.0/20

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Review Questions 

201

E. 172.16.16.0/28

F. 172.16.0.0/27

6.  In the following diagram, what is the most likely reason the station cannot ping outside of 

its network?

Router A

E0: 192.168.10.33/27

IP 192.168.10.28/27

Default gateway 192.168.10.33/27

A.  The IP address is incorrect on interface E0 of the router.

B.  The default gateway address is incorrect on the station.

C.  The IP address on the station is incorrect.

D.  The router is malfunctioning.

7.  If a host is configured with an incorrect default gateway and all the other computers and 

router are known to be configured correctly, which of the following statements is TRUE?

A.  Host A cannot communicate with the router.

B.  Host A can communicate with other hosts in the same subnet.

C.  Host A can communicate with hosts in other subnets.

D.  Host A can communicate with no other systems.

8.  Which of the following troubleshooting steps, if completed successfully, also confirms that 

the other steps will succeed as well?