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Definition of node 1 a: a pathological swelling or enlargement (as of a rheumatic joint) b: a discrete mass of one kind of tissue enclosed in tissue of a different kind
Network topology is the geometric arrangement of nodes and cable links in a LAN. Two general configurations are used, bus and star. These two topologies define how nodes are connected to one another in a communication network. A node is an active device connected to the network, such as a computer or a printer. A node can also be a piece of networking equipment such as a hub, switch or a router.