computer connection

How computer communicates ?

Computers are machines which enable us to communicate via a medium , this medium can be a wire or wireless.communication accurs when some kind of data is exchanged between two computers.another amazing thing here is that data is transfared in the form of bits ie in the form of 0s and 1s 

eg 1010101010111000001010101 

but we see the alphaetical form of messages and data in front of us , the reason is that there are many processes through which data is passed before coming to us .

a network characteristics depends upon the 

Speed of network  (how fast data is transfered from one device to other) 

Consistency  (data should not be interupted or corrupted by any means)

Security  (data should be secured from unauthorized access and data theft should be prevented )

connection between computers can be of many types , like

point-to-point                      (single sender and single reciever)

Multipoint / Broadcast       (single sender and multiple reciever)

Topology 

It is a technique by which computers are interconnected , there are five types of topologies ie

• Mesh topology
• Star toplogy
• Ring topology
• Bus topology

Mesh topology

in mesh topology computers are connected in the form of mesh ,means every computer is connected to every other computer by a separate wire 

Star topology

in star topolgy each computer is connected to a centralized device called Hub , and hub is responsible for the communication between computers.


Ring topology

It is called ring topology because it forms a ring . computers are connected to each other in the form of series and data is broadcasted to every other computer in this way.


Bus topology

in this type of topology a bus like path is created by the transmission cable and computer are connected just like the bus stops on the side of the roads, data flows through wire checking every computer in line before reaching the destination computer.