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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:

What is the maximum number of IP addresses that can be assigned to hosts on a local subnet that uses the 255.255.255.224 subnet mask?

A) 15 B) 16
C) 30 D) 31
 
Answer & Explanation Answer: C) 30

Explanation:

A/27 (255.255.255.224) is 3 bits on and 5 bits off. This provides 8 subnets, each with 30 hosts. Does it matter if this mask is used with a Class A, B, or C network address? Not at all. The number of host bits would never change.

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Q:

What is the subnetwork address for a host with the IP address 200.10.5.68/28?

A) 200.10.5.56 B) 200.10.5.32
C) 200.10.5.64 D) 200.10.5.0
 
Answer & Explanation Answer: C) 200.10.5.64

Explanation:

This is a pretty simple question. A/28 is 255.255.255.240, which means that our block size is 16 in the fourth octent. 0,16, 32, 48, 64, 80, etc. The host is in the 64 subnet.

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Q:

Which mask should you use on point-to-point WAN links in order to reduce the waste of IP addresses?

A) /28 B) /29
C) /30 D) /31
 
Answer & Explanation Answer: C) /30

Explanation:

A point-to-point link uses only two hosts. A/30, or 255.255.255.252, mask provides two hosts per subnet.

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Q:

What is the Class C private IP address space?

Answer

192.168.0.0 through 192.168.255.255

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Q:

What is the Class B private IP address space?

Answer

172.16.0.0 through 172.31.255.255

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Q:

What is the Classs A Private IP address space?

Answer

10.0.0.0 through 10.255.255.255

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Q:

What layer in the TCP/IP stack is equivalent to the Transport layer of the OSI model?

A) Application B) Host-to-Host
C) Internet D) Network Access
 
Answer & Explanation Answer: B) Host-to-Host

Explanation:

The four layers of the TCP/IP stack (also called the DoD model) are Application/process, Host-to-Host, Internet, and Network Access. The Host-to-Host layer is equivalent to the Transport layer of the OSI model.

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