How many usable hosts are available given a Class C IP address with the default subnet mask?
- 256
- 254
- 252
- 255
Explanation: The default subnet mask for a Class C network is 255.255.255.0. Thus there are 8 bits available for assigning host addresses. Eight bits in binary is equivalent to 256 in decimal (2^8 = 256). These numbers are from 0 to 255. However, host portion 0 is reserved for the network address, and the host address with all 1s (in this case 255) is reserved for the broadcast address. Therefore, usable host addresses are 256-2=254.
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