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     Home>>  Networking>>  Advance Hardware


    2. What is a repeater?

    A repeater is a device that regenerates the signal transmitted on a cable. Repeaters allow signals to travel beyond the normal cable length limitations. A repeater does not translate or filter packets.

    Repeaters have the following characteristics:

    • Used to regenerate an existing baseband signal
    • Used primarily in a coaxial bus (linear) topology
    • Segments connected by a repeater must use the same media access control (MAC) method (e.g., a repeater does can not pass traffic between Ethernet and Token Ring)
    • A repeater can pass traffic between different types of media (i.e., coax to fiber optic) if the appropriate interfaces exist
    • Segments connected by a repeater must have the same network address
    • A repeater does not accelerate or change the signal; it simply regenerates it
    • A repeater does not filter packets or limit congestion
    • A repeater will pass a broadcast
    • A repeater operates at the physical layer of the OSI model
    • The basic functionality of a repeater (signal regeneration) can be incorporated into other connectivity devices (e.g., a hub or bridge)

    Because a repeater does nothing to filter or limit traffic on the network, it should be viewed primarily as a means of connecting distant workstations, not as a means of adding additional workstations. In other words, repeaters should be used to extend the length of a network but not its density.




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