Technology, Data Communication Terms, Glossary and Dictionary
IP Subnetting refers to dividing an IP network into a few sub networks (subnet). Subnetting an IP Network can be done for a variety of reasons, including organization, use of different physical media (such as Ethernet, FDDI, WAN, etc.), preservation of address space, and security. The most common reason is to control network traffic. A router is used to connect IP subnets to minimize the amount of traffic each segment must receive. IP networks are divided using a subnet mask which defines the boundaries of an IP subnet. Applying a subnet mask to an IP address allows you to identify the network and node parts of the address.