Subnetting refers to the process of dividing a larger network into smaller networks. In the below-given image, the network has been divided into two broadcast networks, which will reduce the network load and will provide greater network security to the users.

The benefits of subnetting are:

• Improvement in network performance and speed: Subnetting will enable you to make sure about information remains in the broadcast domain or subnetted network, which permits other subnets for maximizing their speed and effectiveness. Also, subnetting will divide broadcast domains of your network which enables you to control the traffic flow in a better way, thus increasing network performance.
• Reduction in network congestion: Using a router for MOVING the traffic between subnets will lead to no broadcast traffic and any information that does not REQUIRE to be routed will be moved to other subnets. As the traffic within each subnet has been reduced, there is an increase in the speed of each subnet, which in turn will ease the network congestion.
• Boosting network security: You will be ABLE to control the flow of traffic with the help of ACLs (ACCESS Control Lists), QoS (Quality of Service), or route maps, ENABLING you for identifying threats, close entry points, and target your responses more easily.
• Ease administration: Using subnetting, you will be able to create networks that have more logical host limits, as opposed to the IP addressing class limitations: 8 bits (Class A), 16 bits (Class B), and 24 bits (Class C). Subnetting will enable you for selecting the number of bits in your subnetwork, thus creating more realistic host limits. Subnetting will be an effective approach for keeping eyes on the systems of your network, which will help you for determining which system needs attention when problems arise. So we can say that subnetted networks are easier to manage and troubleshoot.