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Q:

If you wanted administrators to see a message when logging into the router, which command would you use?

A) message banner motd B) banner message motd
C) banner motd D) message motd
 
Answer & Explanation Answer: C) banner motd

Explanation:

The typical banner is a message of the day (MOTD) and is set by using the global configuration mode command banner motd.

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Q:

Which command displays IP-to-MAC- address mappings on a Windows PC?

A) ping B) traceroute
C) arp -a D) tracert
 
Answer & Explanation Answer: C) arp -a

Explanation:

The arp -a command displays IP-to-MAC-address mappings on a Windows PC.

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Q:

Which of the following is a result of route aggregation?

A) Smaller routing tables B) More complete routing tables
C) Increased memory usage D) Increased CPU usage
 
Answer & Explanation Answer: A) Smaller routing tables

Explanation:

Route aggregation results in smaller routing tables.

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Q:

What switch must be added to the ipconfig command on a PC to verify DNS configuration?

A) /dns B) -dns
C) /all D) -all
 
Answer & Explanation Answer: C) /all

Explanation:

The /all switch must be added to the ipconfig command on a PC to verify DNS configuration.

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Q:

The network address used to advertise a summary address is always which of the following?

A) The last network address in the block B) The next to last network in the block
C) The second network in the block D) The first network in the block
 
Answer & Explanation Answer: D) The first network in the block

Explanation:

The network address used to advertise a summary address is always the first network in the block

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Q:

To test the IP stack on your local host, which IP address would you ping?

A) 127.0.0.0 B) 1.0.0.127
C) 127.0.0.1 D) 127.0.0.255
 
Answer & Explanation Answer: C) 127.0.0.1

Explanation:

To test the localstack on your host, ping the loop back interface of 127.0.0.1

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Q:

Which configuration command must be in effect to allow the use of 8 subnets if the Class C subnet mask is 255.255.25.224?

A) Router(config)#ip classless B) Router(config)#ip version 6
C) Router(config)#ip unnumbered D) Router(config)#ip subnet-zero
 
Answer & Explanation Answer: D) Router(config)#ip subnet-zero

Explanation:

A Class C subnet mask of 255.255.255.224 is 3 bits on and 5 bits off (11100000) and provides 8 subnets, each with 30 hosts. However, if the command ip subnet-zero is not used, then only 6 subnets would be available for use.

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Q:

You need to subnet a network that has 5 subnets, each wit at least 16 hosts. Which classful subnet mask would you use?

A) 255.255.255.192 B) 255.255.255.224
C) 255.255.255.240 D) 255.255.255.248
 
Answer & Explanation Answer: B) 255.255.255.224

Explanation:

You need 5 subnets, each with at least 16 hosts. The mask 255.255.255.240 provides 16 subnets with 14 hosts - this will not work. The mask 255.255.255.224 provides 8 subnets, each with 30 hosts. This is the best answer.

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