The segments remain part of a single logical network. Operate at the data link layer. Routers Routers are similar to bridges in that they link two or more physically separate network segments. The network segments linked by a router, however, remain logically separate and can function as independent networks. Operate at the network layer of the OSI model.
Routers have access to more network level knowledge than is available to bridges.
With this knowledge, routers can perform advanced functions such as calculating the shortest, most economical path between source and destination nodes. Switch A switch builds on your existing network infrastructure, increasing bandwidth dramatically. Essentially, an Ethernet switch is a multi-port bridge that provides a dedicated 10 Mbps Ethernet connection between ports. With switches, multiple 10 Mbps connections can be established simultaneously, increasing the aggregate bandwidth of the network. Switches also allow for a high bandwidth Fast Ethernet link to servers or the backbone by interconnecting workgroups with high-speed links.