In the IPv4 addressing format, the number of networks allowed under Class C…
2017
In the IPv4 addressing format, the number of networks allowed under Class C addresses is
- A.
220
- B.
224
- C.
214
- D.
221
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Correct answer: D
In IPv4 classful addressing, Class C addresses reserve the first 3 bits as '110' within the first octet. The network portion consists of the first 24 bits total. This leaves 21 variable bits (24 - 3) to identify specific networks, resulting in a total of 2^21 possible Class C networks.
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