Repeaters

In a large network a single cable is not capable of transmitting data due to loss in signal over long distance by attenuation, etc so device must be used to amplify the signals. The devices used for this purpose are called repeaters. They require short period of time to regenerate which can cause propagation delay. Repeats cannot do any other function beside signal regeneration. They are used exclusively in networks covering long distances. They are available for all types of guided communication media. They work at physical layer of OSI model.

Advantages of Repeaters

  1. It allows creating networks separate by longer distance networks as well as expansion of networks.
  2. It allows connection of different media.

Disadvantages of Repeaters

  1. Too many repeaters can cause problems networks.
  2. It doesn’t help to ease congestion problem.

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