what is repeater?

What kind of information will you get from this blog?

1. what is repeater ?
2. what are the advantages of the repeater?
3. waht are the disadvantages of the repeater?
4. How repeater is important in OSI model and how is it work?

 

A repeater is an electronic device which operates on only the physical layer of the OSI model. Signals which carry information within a network can travel a fixed distance before attenuation endangers the integrity of the data. A repeater installed on a link receives the signal before it becomes very weak or corrupted, regenerates the original bit pattern, and puts the refreshed copy back onto the link.

Advantages: 

1. Removal of any physical constraints associated with the interconnection function means that both the total number of attached stations and the number of segments making up the LAN can be readily increased. This is important when building large LANS distributed over wide geographical areas.

2.  The buffering of frames received on a segment before forwarding them on another means that the two interconnected segments can operate with a different MAC protocol. Thus, it is easier to create a LAN.

3. Bridges perform their relaying function based solely on the MAC subaddress in a frame with the effect they are transparent to the protocols being used at higher layers in the protocol stack.

4.  Bridges allow a large network to be managed more readily and effectively via the LAN itself.

5.  Partitioning a LAN into smaller segments improves the overall reliability, availability, and serviceability of the total network.

 

Disadvantages:

1. Since a bridge receives and buffers all frames in their entirety before performing the relaying (forwarding) function, it introduces an additional store and forward delay compared with a repeater.
2.  There is no provision for flow control at the MAC sublayer and hence bridges may overload during periods of high traffic.
3. Bridging of segments operating with different MAC protocols means that the contents of frames must be modified prior to forwarding because of the different frame formats.

 

 

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conclusion 

With the help of this blog, you learn about repeater and how is it useful in the OSI model, with all this information you also learn about advantages and disadvantages of the repeater.