Subnetting

=Subnetting=

Subnetting is a way to divide networks into more efficient smaller networks. Usually the reasons to subnet networks are security, better use of network address, and improve troubleshooting.

Here is a reference table of the commonly used TCP/IP classes and their subnet masks


 * **Network Class** || **Beginning Octet** || **Default Subnet Mask** ||
 * A || 1-126 || 255.0.0.0 ||
 * ====B==== || ====128-191==== || ====255.255.0.0==== ||
 * ====C==== || ====192-223==== || ====255.255.255.0==== ||

How to subnet in 5 steps:


 * 1) Determine the class of your network
 * 2) Convert the default subnet mask to binary
 * 3) Determine how many bits you must borrow from the hosts portion of the default subnet mask
 * 4) Use the following equation: 2 n ﻿ >= Number of subnet
 * 5) Covert you custom subnet mask to decimal
 * 6) Find the amount of hosts per network
 * 7) Use the following equation: 2 n ﻿-2 >= Number of hosts per subnet

[|Here] you can find more information about subnetting. This is an example of a subnet network before and after.