In a Class B network, what is the subnet mask used?

In a Class B network, the default subnet mask is 255.255.0.0. This subnet mask allows for a significant number of host addresses within the network. Class B addresses range from 128.0.0.0 to 191.255.255.255 and are designed to serve medium to large-sized networks. The subnet mask of 255.255.0.0 indicates that the first two octets (the first 16 bits) of the IP address are used to identify the network part, while the remaining two octets (the last 16 bits) are used for host addresses within that network.

With this configuration, a Class B network can support up to approximately 65,534 hosts (2^16 - 2, accounting for the network and broadcast addresses). This flexibility in host addressing is particularly beneficial for organizations that require a substantial number of IP addresses while still maintaining a structured network system.

The other options represent different subnetting scenarios. A subnet mask of 255.255.255.0 is typically associated with Class C networks, which allow for a smaller number of hosts. A mask of 255.255.255.255 is a broadcast address used for reaching all hosts within a specific subnet