Final answer:
A Class B network without subnetting has 65,534 usable IPv4 addresses, subtracting the network and broadcast addresses from the total of 65,536 possible addresses.
Step-by-step explanation:
The number of IPv4 addresses available on a Class B network without subnetting is 65,534. This is because a Class B network uses a default subnet mask of 255.255.0.0, which means that the first two octets are used for the network portion, and the remaining two octets are used for host addresses. With each octet containing 256 possible values (0-255), this provides 65,536 possible combinations. However, two addresses in every network are unusable for hosts: the network address (all zeros in the host portion) and the broadcast address (all ones in the host portion).
Therefore, a Class B network has the following number of usable IPv4 addresses:
- 256 x 256 total addresses = 65,536
- 65,536 total addresses - 1 network address - 1 broadcast address = 65,534 available addresses