3 Questions
What is the purpose of a subnet mask?
A) To identify the network portion of an IP address
Which of the following is the default subnet mask for a Class B IPv4 address?
C) 255.255.0.0
Which of the following subnet masks would allow for the largest number of hosts on a network?
A) 255.0.0.0
Study Notes
Subnet Masks
- The primary purpose of a subnet mask is to determine the scope of a subnet, and to identify which part of an IP address represents the network ID and which part represents the host ID.
Default Subnet Masks
- The default subnet mask for a Class B IPv4 address is 255.255.0.0.
Subnet Masks and Hosts
- The subnet mask that would allow for the largest number of hosts on a network is 255.255.255.0, as it uses the least number of bits to define the network ID, leaving the most bits available for host IDs.
Test your knowledge of subnet masks with this quiz question. Identify the default subnet mask for a Class B IPv4 address. Choose the correct option from the given choices.
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