What is the valid host address range in a Class C network?

• A. 192.168.100.0 through 192.168.100.255
• B. 192.168.100.1 through 192.168.100.254
• C. 192.168.0.1 through 192.168.0.254
• D. 192.168.100.2 through 192.168.100.253

Answer: (B)

In a Class C network using the default /24 mask, the network is defined by the first three octets and the last octet identifies hosts. For the network 192.168.100.0 with 255.255.255.0, the network address is 192.168.100.0 and the broadcast address is 192.168.100.255. The usable host addresses lie between them, from 192.168.100.1 to 192.168.100.254. Therefore, the valid host address range is 192.168.100.1 through 192.168.100.254. The other options either include the network or broadcast address, refer to a different network, or omit valid hosts.