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Table of contents
1.
Introduction 
2.
What is Repeater in Computer Networks?
3.
Why are Repeaters needed?
4.
Features of Repeaters in Computer Network
5.
Working of Repeaters
6.
Types of the Repeaters
6.1.
On the Basis of the Types of Signals Generated
6.2.
On the Basis of Types of Network Connected
6.3.
On the Basis of the Domain of LANs Connected
7.
Advantages of Repeaters in Computer Network
8.
Disadvantages of Repeaters in Computer Network
9.
Frequently Asked Questions
9.1.
What is the use of repeater and router?
9.2.
What are the advantages of a repeater system?
9.3.
What is repeater signal?
10.
Conclusion
Last Updated: Mar 27, 2024
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Repeaters in Computer Network

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Introduction 

A Computer Network is a collection of computers that are linked together so that they can share information. They enable the sharing of data, applications, and resources among multiple devices and locations, allowing users to communicate and collaborate more effectively. They play a vital role in modern organizations and society by providing the infrastructure for the internet and other forms of digital communication.

repeater in computer network

In this article, we will discuss the Repeaters in Computer Network, an important network hardware device in computer networks, its working, features, types, advantages, and disadvantages of a repeater.

What is Repeater in Computer Networks?

repeater is a powerful network hardware device that regenerates an incoming signal from the sender before retransmitting it to the receiver. It is also known as a signal booster, and it helps in extending the coverage area of networks. The Incoming data can be in optical, wireless or electrical signals. It works at the physical layer of the OSI model. 

When the incoming signals are attenuated, it copies them bit by bit and retransmits them at their original strength. It is used for longer-distance data transmission without compromising data security or quality. Repeaters are two-port devices.

Let's understand about repeaters with an example:

Assume that one person communicates with the other using a one-to-one communication device such as a walkie talkie. If there is a clear path between the two points, the data can be transmitted successfully. If there is a hill or mountain in the way, the data cannot be delivered flawlessly.

As a result, an antenna is placed between the two devices to avoid this situation, as shown below.

Repeater in Computer Networks
 

 This device sends the data back to the receiver and directs the signals to the weak spots. This is referred to as the repeater's primary function.

Repeater function
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Why are Repeaters needed?

Here are some of the reasons why repeaters are needed.

  • Repeaters are used to amplify the signal and transmit it at a higher power level.
     
  • It acts as a bridge between different network standards.
     
  • It helps in increasing network coverage by connecting various network segments.
     
  • It increases the distance networks can travel over a network cable.

Also see,  Personal Area Network

Features of Repeaters in Computer Network

  • It strengthens the system signals by transmitting signals to the weaker locations.
     
  • The Repeaters can continuously monitor the signals generated between the two LANs.
     
  • Repeaters can help with networking flexibility.
     
  • All of the Repeaters are linked together using an IP site connection network. Any problem in the repeater network can be quickly resolved by using that IP network.
     
  • Repeaters do not necessitate any additional processing. The only time they need to be investigated is when performance suffers.
     
  • Signals can be connected using various types of cables by using repeaters.

Working of Repeaters

  1. Signal Regeneration: Repeaters receive signals on one side, amplify them, and retransmit them on the other side, ensuring the signal remains strong and clear over long distances.
  2. Signal Correction: Repeaters can also correct errors or distortions in the transmitted signal, ensuring reliable data transmission.
  3. Distance Extension: Repeaters extend the range of communication networks by boosting signals, allowing data to travel farther without degradation.
  4. Network Connectivity: Repeaters facilitate network connectivity by bridging gaps between segments of a network, enabling seamless communication between distant devices.

Types of the Repeaters

On the Basis of the Types of Signals Generated

Digital repeaters:

Data is transmitted in the form of binary digits such as 0s and 1s. While transmitting data, 0 and 1 values are generated, and it can transmit data over long distances. This repeater is capable of retiming and resynchronizing.

Analog Repeaters:

Data is transmitted in the form of analog signals to increase the amplitude of the data. These repeaters are used in trunk lines to help broadcast multiple signals using frequency division multiplexing (FDM). It houses the linear amplifier as well as the filters.
 

Analog Repeaters

 

On the Basis of Types of Network Connected

Wired Repeaters:

They are used in wired LANs.

 For example OCRs

Optical communications Repeater:

Optical Communication Repeaters (OCRs) are devices that extend the range of signals carried by a fiber optic cable. Digital signals are transmitted as a short pulse of light through a fiber optic cable in this repeater. Photons are tiny particles of light that can be absorbed or scattered in the fiber. 

On the other hand, optical amplifiers are designed for repeaters to amplify light without first converting it to an electric signal.

Wireless Repeaters:

They are used in wireless LANs and cellular networks.

For example telephone repeaters, and radio repeaters.

Telephone Repeater:

Long-distance communications are carried out over telephone networks. To increase the power, a transistor-based amplifier is maintained. This telephone network is a bidirectional communication system in which audio signals transmit data. These telephone services are primarily used in submarine communications. These telecommunication services were created in the early 1990s using a pair of analog signal wires.

Radio Repeater:

It is used to extend the range of radio signal coverage. A radio repeater is a device that consists of a radio transmitter and a radio receiver. The received signals are amplified and retransmitted frequently at different frequencies to provide coverage beyond the obstruction.

On the Basis of the Domain of LANs Connected

Local Repeaters:

They connect LAN segments separated by small distances.

Remote Repeaters:

They connect LANs that are far from each other.

Advantages of Repeaters in Computer Network

  • The Repeater supports the signal strength.
     
  • These Repeaters are both cheap and easy to use.
     
  • The Repeaters have no impact on the network's performance.
     
  • These Repeaters are capable of retransmitting data and boosting weak signals.

Disadvantages of Repeaters in Computer Network

  • The number of collisions increases as the number of repeaters increases.
     
  • Only a limited number of repeaters can be connected to it.
     
  • We can't connect the different network architectures in repeaters.
     

The data traffic in the Repeaters cannot be reduced.


Also Read - Subnetting in Computer Networks

Frequently Asked Questions

What is the use of repeater and router?

Repeaters are used to amplify and retransmit signals in communication networks, extending their range and ensuring signal integrity over long distances. Routers, on the other hand, are used to forward data packets between different networks, enabling interconnection and efficient data routing.

What are the advantages of a repeater system?

A repeater system enhances communication by extending the range of signals, overcoming obstacles and signal degradation. It boosts coverage, ensures reliability, and improves the overall quality of wireless communication.

What is repeater signal?

A repeater signal is a retransmitted radio frequency signal used to extend the range and coverage of wireless communication systems. It amplifies and rebroadcasts signals to overcome obstacles and enhance communication.

Conclusion

This article discussed repeaters in computer networks, a powerful network hardware device that regenerates an incoming signal from the sender before retransmitting it to the receiver, along with their features, types, advantages, and disadvantages. 

Keep an eye out on our site for more exciting topics.

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