How many usable IP addresses are in a single Class C block?

How many usable IP addresses are in a single Class C block?

• 24
• 508
• 36000
• 254

EXPLANATION

There are 256 actual addresses, but the 0 and 255 host addresses are not usable, giving you only 254 usable addresses. The .255 is used as the broadcast address, anything sent to that address should be answered by all devices in the same IP Block. The .0 address is reserved as the network address and is not usable as a host address.