Default subnet mask of class A IP address is _________
2016
Default subnet mask of class A IP address is _________
- A.
255.255.0.0
- B.
0.0.0.255
- C.
255.0.0.0
- D.
255.255.255.0
Attempted by 114 students.
Show answer & explanation
Correct answer: C
In classful IPv4 addressing, a Class A network allocates its first 8 bits (the first octet) for the Network ID and the remaining 24 bits for Host IDs. Setting all network bits to 1s yields the default subnet mask 255.0.0.0. Therefore, Option C is correct.