class c network subnet problem

Question

A class c n/w has been connected to a router with mask 255.255.255.49. a packet with ip 195.200.180.173 arrived at router.find the no of subnet in the network.

Answer 1

8 subnets will be there  in class c host id bits are 8 and that are the last ones . in the last ones we have taken 3 bits i.e( 32, 16, 1) . for sbnetting convention is that , take the bits from starting but we can take bits from anywhere . so by 3 bits 8 subnets are possible .

Comments

thanx

Answer 2

as mask is given as 49 => 00110001

which means it is having 3 one's which represent number of subnet id's

therefore 2pow(3)-2 which is equal to 6

so,answer is 6 subnet ids