What is the default subnet mask for a Class B IP address?

What is the default subnet mask for a Class B IP address?

• A. 255.255.255.0
• B. 255.255.0.0
• C. 255.0.0.0
• D. 192.168.1.1

Answer: (B)

The default subnet mask for a Class B IP address is 255.255.0.0. This subnet mask allows for a significant number of host addresses, supporting larger networks that require more devices than what a Class C subnet can accommodate. In Class B, the first two octets (the first 16 bits) are used to identify the network part, while the remaining two octets are designated for host addresses within that network. This means that a Class B network can have over 65,000 possible host addresses, making it suitable for medium to large-sized networks, such as those used by universities or large corporations. The other options listed represent the default masks for different classes of IP addresses. For instance, 255.255.255.0 is the default subnet mask for Class C addresses, while 255.0.0.0 pertains to Class A. The address 192.168.1.1, on the other hand, is not a subnet mask; it is a specific private IP address commonly used in home networking scenarios but does not reflect any default subnet mask related to Class B addresses.

The default subnet mask for a Class B IP address is 255.255.0.0. This subnet mask allows for a significant number of host addresses, supporting larger networks that require more devices than what a Class C subnet can accommodate. In Class B, the first two octets (the first 16 bits) are used to identify the network part, while the remaining two octets are designated for host addresses within that network. This means that a Class B network can have over 65,000 possible host addresses, making it suitable for medium to large-sized networks, such as those used by universities or large corporations.

The other options listed represent the default masks for different classes of IP addresses. For instance, 255.255.255.0 is the default subnet mask for Class C addresses, while 255.0.0.0 pertains to Class A. The address 192.168.1.1, on the other hand, is not a subnet mask; it is a specific private IP address commonly used in home networking scenarios but does not reflect any default subnet mask related to Class B addresses.