Question

Let us suppose we have 9 devices in a network. Explain what happens when a connection fails in the network arranged in the form of a:

• mesh topology
• star topology (not counting the hub)
• bus topology
• ring topology

Answer 1

Mesh Topology :

1. In mesh topology, every node has a connection with every other node so mesh topology can be referred as fully connected network.
2. For 'n' nodes we require n(n-1)/2 number of point connections.
3. For 9 devices we will have 36 links. If any link goes down from them so it will be easy to find out which one is down and it won’t effect on other links.
4. Mesh Topology is more reliable than star and tree topologies
5. The cost to implement is higher than other network topologies, making it a less desirable option.

Star Topology :

1. In star topology each device has a dedicated point-to-point link to a Hub. For 9 devices there will be 9 links to the hub.
2. If any link goes down and connections fail so the other won’t be effected.

Bus Topology :

1. In bus topology, each computer and network device are connected to a single cable or backbone.
2. If any link goes down so signals won’t pass on and get back to origin which will create noise on both sides.
3. And if backbone wire is broken so the whole communication will be dsabled.
4. It works well when you have a small network.

Ring Topology :

1. In ring topology, the systems are interconnected using point to point links in circular fashion.
2. In a ring network, packets of data travel from one device to the next until they reach their destination.
3. If any link fails, it leads to unsuccessful transmission.

Let's see how the devices are connectes in ach topology.

I took 4 devices only for mesh topology since it is diificult to draw with 9 devices.

Conclusion :

1. In mesh and star topologies, when a connection fails it won't effect others
2. In bus and ring topologies, it effect others