InterconnectionDevices

InterconnectionDevices - CECS 474 Computer Network...

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CECS 474 Computer Network Interoperability Network Interconnection Devices Repeaters, Hubs, Bridges, Switches, and Routers Repeaters and Hubs A repeater is a network interconnection device that regenerates signals coming in one link onto another. Repeaters use no logic in regenerating signals, so data and noise are both sent through the repeater. Repeaters can be used to extend the range of a single LAN. A hub is a network interconnection device that accepts an input signal from an incoming port and copies it onto all of its output ports. Dr. Tracy Bradley Maples (Fall 2009)
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Physically, hubs are: Small electronic devices Have connections for several computers (e.g., 4 or 20) Logically, hubs: Operate only on signals Propagate each incoming signal to all connections Are similar to connecting segments with repeaters Do not understand packets so it cannot filter them Hubs have extremely low cost. Dr. Tracy Bradley Maples (Fall 2009)
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Bridges and Switches A frame is a packet of data passed across the network at Layer 2 of the
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InterconnectionDevices - CECS 474 Computer Network...

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