Subnetting

Question

Comments

https://gateoverflow.in/86572/test-by-bikram-computer-networks-test-1-question-14

Answer 1

Option b is correct. 255.255.255.0 can have maximum of 256 subnets and 256 hosts. Option c and d are not valid subnet masks.

Answer 2

Number of subnet are 2^n-2   n->subnet network bits

Number of host per  are 2^m-2  m->host bits

Number of subnet=2^8-2=254(1 to 254 )

Number of host=2^8-2=254(1 to 254 )

network mask(network bits and sub network bits are 1's and host bits are 0)

=>255.255.255.0(B option)

Comments

Because one ip is used for network I'd and one ip for DBA of network