The default subnet mask for Class B IP addresses is:
2016
The default subnet mask for Class B IP addresses is:
- A.
255.0.255.0
- B.
255.255.255.0
- C.
255.255.0.0
- D.
0.0.255.255
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Correct answer: C
The correct option is C (255.255.0.0). In classful routing, a Class B IPv4 address uses the first 16 bits for the network ID and the remaining 16 bits for host IDs. Therefore, its default subnet mask sets the first two octets to all 1s and the last two octets to all 0s, resulting in 255.255.0.0 (or /16 prefix).