Which one of the following is the subnet mask equivalent of

Which one of the following is the subnet mask equivalent of /17?

A. 255.255.255.192

B. 255.255.0.0

C. 255.255.1.0

D. 255.255.128.0

E. 255.255.255.128

Solution

Answer:D. 255.255.128.0

D. 255.255.128.0 is the subnet mask equivalent of /17.

A. 255.255.255.192 is the subnet mask equivalent of /26.

B. 255.255.0.0 is the subnet mask equivalent of /16.

E. 255.255.255.128 is the subnet mask equivalent of /25.