networking - How to find Subnets and Hosts from given IP -
i have been learning subnetting exam , came through question. but why this? first thought: 172.20.0.0 can have 254 subnets , 254 hosts per each subnet. wrong. can please explain me how this? thanks guys the netmask 255.255.252.0 has 10 0 bits @ end. 2 ^ 10 = 1024, minus broadcast , network address = 1022. if you're using classful way of dividing network, 172.20.* b network, 16 bit size of network part. gives 16-10 = 6 bits spare, can split 2 ^ 6 = 64 networks.