In a 192.168.1.0/24 network, which is the first usable host address?

In a 192.168.1.0/24 network, which is the first usable host address?

• A. 192.168.1.0
• B. 192.168.1.255
• C. 192.168.1.1
• D. 192.168.1.2

Answer: (C)

With a 192.168.1.0/24 network, the subnet mask is 255.255.255.0. In IPv4 subnets, the first address (all host bits zero) is the network address, and the last address (all host bits one) is the broadcast. So 192.168.1.0 is the network address and 192.168.1.255 is the broadcast. The usable host addresses range from 192.168.1.1 to 192.168.1.254, making 192.168.1.1 the first usable host address. The other options are either the network address, the broadcast, or a later usable host.

With a 192.168.1.0/24 network, the subnet mask is 255.255.255.0. In IPv4 subnets, the first address (all host bits zero) is the network address, and the last address (all host bits one) is the broadcast. So 192.168.1.0 is the network address and 192.168.1.255 is the broadcast. The usable host addresses range from 192.168.1.1 to 192.168.1.254, making 192.168.1.1 the first usable host address. The other options are either the network address, the broadcast, or a later usable host.