A sub-network (subnet) is a smaller network under a bigger one. It gives an immediate identification as to where the information originates. A subnet allows the good flow of network transmissions among host sites. These sites or networks can be segregates using a configuration called a subnet pattern.
A subnet may typically stand for the machines located in the same Local Area Network or the LAN. The computer can share a single network address when accessing the Internet.
Installing a subnet involves splitting a Transmission Control Protocol/Internet Protocol (TCP/IP) into smaller, more manageable pieces.
The idea is that a network with a huge amount of transmission flowing through its system initiates a traffic condition. When congestion happens, the network tends to slow down. When a subnet is applied to the network, the entire network is split into smaller interconnected parts that work as one system.
Why Use a Subnet?
Many benefits can be derived from the implementation of a subnet system. Application of subnet in an IP Network is done for the organization and the use of physical network media like WAN, Ethernet, and FDDI.
The common purpose of subnetting is to manage network traffic. A subnet will reduce congestion which can reach a global extent. It unloads a big part of work from the Internet administrator. This results in a faster system. The work will be decentralized and the network will flow with ease.
Another benefit is the conservation of address space and security. Without the subnet, a work group may make multiple connections with the Internet and impose an unnecessary task of assigning the bulk of addresses. Each machine is an individual network and this will involve the use of the limited network numbers the Internet needs to assign. It also requires the Internet gateway to manage the routing that should be handled by the organization. The result is much activity on the gateway outside and a higher traffic. However, this can be avoided when a company takes the initiative to install subnets in the workplace.