Class 4 Addresses

[TenthAveN]

I’m reading the Security+ study guide (which is really interesting so far), and to cut to the point. How do you calculate an address class range (number of possible IPs) if that class does not have a network mask?

 

[pgp_protector]

AAAA.BBBB.CCCC.DDDD
Each block is 256 Addresses (0-255)
So if you're using all 4 blocks it would be 256*256*256*256 = 4294967296

if you're only using 3 Blocks (192.BBBB.CCCC.DDDD)
It would be 256*256*256 = 16777216

For 2 Blocks
256 * 256 = 65536

For 1 Block = 256