Problem Statement
Given the IP address 192.168.10.0/26, calculate the number of subnets, hosts per subnet, and the valid range of the first subnet.
Explanation
A /26 prefix means 64 addresses per subnet (2⁶). Subtracting network and broadcast addresses, there are 62 usable hosts. Since it’s from a Class C range, the block size is 64. The first subnet runs from 192.168.10.0 to 192.168.10.63, with usable host range 192.168.10.1–192.168.10.62. There are four total subnets (since 256 / 64 = 4). Showing such calculations confidently in interviews demonstrates subnetting fluency.