What is ment by link and node?

In the context of computer networks and graph theory, a link refers to a physical or logical connection between two nodes. It represents the communication path or channel that allows data to be transmitted between nodes. Links can be wired or wireless, and they can have different characteristics such as bandwidth, latency, and reliability.

A node, on the other hand, is a fundamental component of a network. It can be a device, computer, server, or any other network entity that is capable of sending, receiving, or forwarding data. Nodes are connected to each other through links, and they can perform various functions such as data processing, storage, and routing within the network.

In summary, a link represents the connection between two nodes, while a node is a network entity that can send, receive, or forward data.