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Disadvantages of star topology

All the computers connected to a central hub would be disconnected when the central hub fails.

All the operations of computers are depending upon the operation of the central server.

The network may be slow if there are many nodes.

It require more length of cable than a linear topology.

Ring Topology

Ring topology also known as ring network. Data travels from node to node. Packet of data is passed only in one direction, receive data node to node. This topology has only one pathway between any two nodes, ring networks may be disrupted by the failure of a single link. A token, or small data packet, is continuously passed around the network. When a device needs to transmit, it reserves the token for the next trip around, then attaches its data packet to it. The receiving device sends back the packet with an acknowledgment of receipt, then the sending device puts the token back out on the network. Data are passed in one direction only, being received by each node and then transferred to the next node.

Advantages of ring topology

Network server is not managing the connectivity between the computers.

Ring networks are moderately easy to install.

Using token ring can create much larger network

Disadvantages of ring topology

A single break in the cable can disrupt the entire network.

The failure of a single node of the network can cause the entire network to fail.

The movement or changes made to network nodes affects the performance of the entire network.

Linear bus topology

The topology consists of main cable with a terminator at each end. Nodes are connected to the linear cable. A bus network uses a multi-drop transmission medium, all node on the network share a common bus and thus share communication. This allows only one device to transmit at a time. Data frames include source and destination addresses, where each station monitors the bus and copies frames addressed to itself.Computer connect this network will check these address and then receive and accept the data.If data sends in parallel, network use Carrier Sense Multiple Access with Collision Detection (CSMA/CD) access method for prevent data collision.

Advantages of linear bus topology

The computers are easy to connect.

If one of the station fails, the other are not affect.

Not need very much length of cable than a star topology.

The complexity of wire is low.

Disadvantages of linear bus topology

If the main cable is a break, the whole network is shut down

And so, this can become problem.

Terminators are need.

Definition of mesh topology

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