Given an IP address of 192.168.15.12 with a subnet mask of 255.255.255.0, which address is in the same subnet?

To determine which IP address is in the same subnet as 192.168.15.12 with a subnet mask of 255.255.255.0, we need to look at how subnetting works with this specific mask. The subnet mask 255.255.255.0 allows for a range of IP addresses where the first three octets (192.168.15) define the network portion, and the last octet (12) represents the host within that network.

The network address for the given IP (192.168.15.x) is 192.168.15.0, and the valid host addresses within this subnet range from 192.168.15.1 to 192.168.15.254. This means that any IP address starting with 192.168.15 will be part of the same subnet.

Address B, 192.168.15.101, shares the same first three octets as the original IP address (192.168.15), which confirms it is indeed part of the same subnet.

The other choices fall outside this subnet range. Address A, 192.168.1.15, has a different third octet (1 instead of 15);