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 is Mesh Topology ?

 What are the advantages and disadvantages of a mesh network ( topology) ?

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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