How can I find subnet mask given a network ID

Question

How can I figure out what the subnet mask is supposed to be given a network ID? Network ID: 210.107.189.0 Subnets required: 2

I am trying to study for the Network+ certification and was looking into subnetting practice found here: https://www.nybi.org/subnet-1.php

any help is appreciated

See the excellent answer to [this question](https://networkengineering.stackexchange.com/q/7106/8499). — Ron Maupin, Jun 28 '17 at 14:59

score 0 · Accepted Answer · answered Jun 28 '17 at 14:54

0

Assuming that you have the latest octet to play with, you can have 2 /25 networks.

answered Jun 28 '17 at 14:54

Alex Roig

You are assuming a `/24` network, but that may not be the case. – Ron Maupin Jun 28 '17 at 14:59

1 Answers1