Network+ Tutorial

2.0 Protocols and standards

2.3 Subnetting

     Subnetting is the process of dividing a network into two or more logically addressable smaller networks.  Given below are some of the advantages of subnetting a network:

• The IP address space is in ever growing demand. It is important that assigned IP addresses are well utilized. Subnetting enables one to utilize assigned IP addresses optimally.

• Subnetting minimizes unnecessary traffic. A router is used to route traffic between different subnets. This eliminates unnecessary flooding of network segments with packets destined for some other subnets.

• Makes the network more manageable. For example, a Company, by allocating separate subnets to each department, can manage the whole network easily.

• Improve security: When you subnet a larger network, each subnet is a mini network. Typical routing rules apply. This enhances the security of the overall network.