Can anyone explain Why there are 62 subnets instead of 64 ? i understand 1022 host but having difficulty in s…
Vivek Dokku
Can anyone explain Why there are 62 subnets instead of 64 ?
i understand 1022 host but having difficulty in subnets
Comments
@vivekdokku 62 subnets is according to old routers, for old routers first and last subnet id were not used for hosts, but not a problem for modern routers. It is damn sure that no. of hosts will be 1022 since 64 subnets not available in option with 1022 hosts, therfore answer C
KG AI MentorKG AI Mentor
Quick Answer62 subnets and 1022 hosts per subnet. Borrowing 6 bits from the Class B host portion gives 64 subnets, but subnet zero and the all-ones subnet are traditionally unused, leaving 62. Each subnet has 10 host bits, giving 2^10 - 2 = 1022 hosts. Key StepsClass B default: 255.255.0.0 (/16) → 16 host bits. Borrow 6 bits for subnets → new mask: 255.255.252.0 (/22). Subnets: 2^6 = 64; subtract 2 reserved subnets (subnet zero and all-ones) → 62. Hosts per subnet: 2^(32-22) - 2 = 2^10 - 2 = 1022. Note: In modern CIDR you may treat subnet-zero/all-ones as usable; otherwise, you get 62 subnets. — KG AI Mentor 🤖