FENMS 033 - Computer Networks

Subnetting Practice

You can use this site to practice subnetting problems for the lab exam.
Click on one of the buttons below to generate a practice problem.

* Simple: 3 subnets; small total numbers of hosts; hosts will not "overflow" into the 3rd octet.
* Medium: 3 subnets; bigger number of total hosts; hosts might "overflow" into the 3rd octet.
* Challenging: 4 - 6 subnets; bigger number of total hosts; hosts will "overflow" into the 3rd octet.

Subnet mask	{{mask}}
Network address	{{network}}
Broadcast address	{{broadcast}}
First usable IP	{{first}}
Last usable IP	{{last}}

FENMS 033 - Computer Networks

Subnetting Practice

Default subnet mask

{{defaultSubnetMask}}

Subnet {{i}}

{{subnet}}

{{cHosts}} hosts

Total IPs: {{numHosts}} ({{h}} host bits → 2^{{h}})

Usable host IPs: {{usableHosts}} (2^{{h}} - 2)

FENMS 033 - Computer Networks

Subnetting Practice

Default subnet mask

{{defaultSubnetMask}}

Subnet {{i}}

{{subnet}}

{{cHosts}} hosts

Total IPs: {{numHosts}} ({{h}} host bits → 2{{h}})

Usable host IPs: {{usableHosts}} (2{{h}} - 2)

Total IPs: {{numHosts}} ({{h}} host bits → 2^{{h}})

Usable host IPs: {{usableHosts}} (2^{{h}} - 2)