What is Ring Topology ? What are Ring topology advantages and disadvantages?

 Ring Topology

What is Ring Topology ? 
Ring Topology :
In a ring topology, :
each device has a dedicated point-to-point connection with only the two devices on either side of it. 

How does a ring topology work?
  • A signal is passed along the ring in one direction, from device to device, until it reaches its destination.
  • Each device in the ring incorporates a repeater.
  • When a device receives a signal intended for another device.
  •  its repeater regenerates the bits and passes them along .

What are Ring topology advantages and disadvantages?
What are the advantages of a Ring network ( topology) ?
Why do we use ring topology?
Advantages of Ring topology :
  • A ring is relatively easy to install and reconfigure.
  • Each device is linked to only its immediate neighbors (either physically or logically).
  • To add or delete a device requires changing only two connections.
  • fault isolation is simplified. 
in a ring a signal is circulating at all times.
 If one device does not receive a signal within a specified period, it can issue an alarm. 
The alarm alerts the network operator to the problem and its location. 

What are the Disadvantages of a Ring network ( topology) ?
Disadvantages of Ring topology :
Disadvantages include :
  • unidirectional traffic can be a disadvantage.
  • In a simple ring, a break in the ring (such as a disabled station) can disable the entire network.
  • This weakness can be solved by using a dual ring or a switch capable of closing off the break.
Where do we use ring topology?
Ring topology was prevalent when IBM introduced its local-area network, Token Ring. 
Today , the need for higher-speed LANs has made this topology less popular. 


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