All Challenges
beginnernetworking3 min+15 pts

Subnet Mask Math

How many usable hosts can this subnet hold?

You are given a network with CIDR notation. Calculate the number of usable host IP addresses.
challenge
Network: 192.168.1.0/26
A /26 subnet means 26 bits are used for the network. How many bits remain for hosts? Usable hosts = 2^(host bits) - 2 (subtract network and broadcast addresses). Enter just the number.

Challenge of the week?

New challenges added every Monday

Get full labs