Don't miss even single copy of tricks from us.Just Click the Like Button Below...

Powered By Best 1 Articles

Translate

Tuesday, March 19, 2013

Network Topologies


Network topologies







Introduction:- Network topology is the architecture of the wires which we use to connect one computer to the other in a network. There are 4 topologies we use to establish a network for the communication. Every topology has its own advantages and disadvantages. The different topologies are:-


1. Mesh topology
2. bus topology
3. star topology
4. ring topology

Mesh topology:- The basic principle of this topology is to connect every single computer to every other computer to form a network. This topology is suitable for small no. of computers but if there is large no. of computers then this topology becomes complex and is rarely used. It becomes tedious and complex to connect every single computer to every other computers when the no. of computers is large. This type of topology is used in Supercomputers. There is no any intermediate in between the wires therefore it increases the speed and hence is used in the supercomputers.
Network topologies


Advantages:- a) Speed is high because of no intermediates in the wires. That’s why is used in Supercomputers.
b) The network can be expanded without interrupting the other users.

Disadvantages:- a) It requires large no of wires. Therefore, cable cost is too high.
b) It forms the complex circuit.

Bus topology:-  There is a single wire which is having T connectors to connect all the computers with each other to form a network. The wire is basically a dead wire but the part of the wire having computers on its both sides shall not be a dead wire means there will be a current in it. 10 Base-2, 10 Base-5 are the examples of wires used years ago. Any no. of computers can be connected with this type of topology. Bus topology can be seen in the computer labs to connect computers.
Network topologies


Advantages:-  a) It requires less no. of cables. So cable cost is not high.
b) It is easy to implement.

Disadvantages:- a) A single break in the wire will stop the connection of other computers too.
b) The troubleshooting is difficult.

Star topology:- In this type of topology, we use an intelligent device called Hub or Switch to connect all the computers to form a network. There is a chip in the Hub that will decide the path of the data flow in the wires. The single wire will be required to connect one computer to the Hub. So the no. of computers will required the same no. of wires to connect to the the Hub.
The Hub is the single point of failure. The failure in one computer will not interrupt the other computer. So this is the most widely used topology in the networking of computers. This topology can be seen in the servers.
Network topologies


Advantages:- a) Point to point connection between the computers and the Hub.
b) Failure in one computer will not interrupt the working of other computers.
c) Easy to troubleshoot the problem.

Disadvantages:-  a) Again it requires the same no. of cables equal to the no. of computers. So, for a large no. of computers, large no. of cables are required.
b) Difficult to implement.

Ring topology:- This topology uses the principle of connecting every computer with its adjacent computer and not to all other computers. So the flow of data will form a circular path from one computer to another computer. This type of topology can be seen in the servers. Ring topology can be implemented by using SONET,FDDI or Token Ring technology.
Network topologies


Advantages:- a) Easy to install
b) Troubleshooting is easier because cable faults are easily located.

Disadvantages:- a) A single break or fault in the wire will halt the entire network.
b) Expansion of the network will disrupt the other users of the network.

Credits:- Yuvraj Salaria

UA-31448503-1