For the IPv4 address 192.168.1.10 with a /24 subnet, what is the network address?

• A. 192.168.1.0
• B. 192.168.0.0
• C. 192.168.1.10
• D. 192.168.0.1

Answer: (A)

With a /24 subnet, the network is defined by the first three octets and the last octet is the host portion. The network address is found by setting the host bits to zero. For 192.168.1.10, the first three octets remain the same and the last octet becomes 0, giving 192.168.1.0. This is the network address of the 192.168.1.0/24 subnet.

The other addresses don’t fit: 192.168.0.0 would be the network address for a different /24 boundary (192.168.0.0/24), the address 192.168.1.10 is the host address itself, and 192.168.0.1 belongs to the 192.168.0.0/24 network, not the 192.168.1.0/24 network.