Subneting

Question

For GATE, Zero ^th subnet address is considered, useable or reserved?

Suppose if we have, 3 subnet bit then what will be 5^th subnet? Will it be `101` or `100`?

Which one will be considered in gate exam?

Answer 1

It can be anything. It's your choice. All possible subnets are - 000, 001, 010, 011, 110, 111, 101, 100.

Answer 2

By Default use 000 as 1^st subnet.