Segmentation by a Router has all of these advantages and more. Each interface on the router connects to a separate network, so insertion of the router into a LAN creates smaller collision domains and smaller broadcast domains, which is the set of all devices that will receive broadcast frames originating from any device within the set. Routers typically bind broadcast domains because they do not forward broadcast frames. Routers do not forward broadcasts unless programmed to do so, however, they can perform bridging and switching functions. The router can perform best with a path selection and can be used to connect different networking media, and different LAN technologies. Routers can connect LANs running different protocols (IP vs. IPX vs. AppleTalk) and can have serial connections to WANs.
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