What is Subnet / Subnetwork?

Subnet is a subdivision of any IP address which is logical and use to divide the whole network into multiple parts.

Subnet is sometimes referred as subnetwork.

Subnet or Subnetwork allows the flow of network traffic between hosts to be segregated based on a network configuration. By organizing hosts into logical groups, subnetting can improve network security and performance.

Subnetting which is used frequently with terms is not refers to subnet. Actually this is the practice of dividing a network into multiple subnetworks. So subnetting is just the practice of dividing a network into multiple small subnets or subnetworks.