Sub-netting, the meaning is there right? Dividing a network . So in brief, it is a task of dividing a network into two or smaller networks. But why? Do we actually need this? If we are doing something, there should be gain . What do we get in dividing a network? Increases the efficiency in routing. What is routing in a computer network? It is a process performed by the network layer for choosing an optimal path for traffic in order to deliver the packet in a network or between or across multiple networks. It enhances the security of the network. What is Network Security? The practice of preventing and protecting a network from unauthorized intrusions. It complements endpoint security, which focuses on every individual device which is connected to the network. Reduces the size of the broadcast domain. What is the broadcast domain? It is a logical division of a computer network , in which all redistribution points or a communication endpoint can reach each other by a method of transfe...