How many usable hosts are available given a Class C IP address with the default subnet mask?
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.
Exam with this question: 8.7.2 Module 8 – The Internet Protocol Quiz