👉 In mathematics, a node is an element of a graph that is connected to exactly one other node. A directed graph (also known as an undirected graph) with a single source and multiple edges between its nodes is called a cycle. For example, in a graph where there are two nodes A and B, the path AB -> BA would be considered a cycle because it has exactly one node crossing from A to B. Nodes are also used in computer networks to represent points on a network that are