A node may refer to any of the following:
1. In data communication, a node is any active, physical, electronic device attached to a network. These devices are capable of either sending, receiving, or forwarding information; sometimes a combination of the three. Examples of nodes include bridges, switches, hubs and modems to other computers, printers, and servers. One of the most common forms of a node is a host computer; often referred to as an Internet node.
2. The term node may also refer to node.js, a runtime environment for server-side applications.