A node is a point where two or more lines intersect. In networking, nodes are the points where cables connect and allow devices to communicate with each other. Nodes can be physical (like a router or switch) or logical (like a host on a network). In computer networks, nodes are often identified by their IP address. When data is sent between devices, it's broken down into packets that are routed through the network to the intended destination. Each packet contains the source IP address and the destination IP address of both the sender and receiver. The routers and switches along the way use these addresses to determine how to forward the packets to their final destination.

A node is a device on a computer network that can send or receive data. Nodes can be workstations, servers, routers, or other devices. Typically, each node is assigned an IP address so that it can be identified and communicated with.