What is a node?

In computer networking, a node is any physical or virtual device that is part of a network. This includes hosts like HMIs and PLCs, as well as devices that help manage network traffic, such as routers, switches, and access points. Every node has a unique identifier like a MAC or IP address and plays a role in transmitting or processing data. While all hosts are nodes, not all nodes are hosts. Some nodes just help move data without directly sending or receiving it themselves.

Content created by Dalton Puffer