Frequent Questions      

    CCNA™ (200-120) Exam Practice Questions


IP address range classification (Class A, Class B, Class C and Class D)


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Q1. Which of the following is Class C IP address?





  Correct Answer: D



IP addresses are written using decimal numbers separated by decimal points. This is called dotted decimal notation of expressing IP addresses. The different classes of IP addresses is as below:

Class Format  Format  Leading Bit Pattern Network address Range Maximum nets Maximum hosts
A N.H.H.H 0 - 126  127  16,777,214
B N.N.H.H 10 128 - 191  16,384  65,534
C N.N.N.H 110 192 - 223  2,097,152  254

Network address of all zeros means "This network or segment".

Network address of all 1s means " all networks", same as hexadecimal of all Fs.

Network number 127 is reserved for loop back tests.

Host (Node) address of all zeros mean "This Host (Node)".

Host (Node) address of all 1s mean "all Hosts (Nodes) " on the specified network.

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