Communication

All the data movements within a computer via buses. A bus is a group of electrical conductors and mostly wires.. A bus can be copper traces on a circuit board or wires in a cable.

Usually a bus is a multiples of eight (8,16,32,64.....). In the earlier computers,engineers used a set of 8 wires for constructing buses, because of this it allows transmission of eight bits,or one byte on the same time.The number of parallel wires in a bus is called the bus width.Wider the bus ,more bits can be send simultaneously resulting in faster data transmission. Its mean 8 bits bus can send only 8 bits of a data at a time and 32 bits bus can carry 32 bits data at a time.


Type Of Communication :-
Parallel Communication- 

This is a method of sending several data signals simultaneously over several parallel channels.This enables the data to travel faster.

Serial Communication -

In many computer data carry in serial order ,one after the an other in a sequence. This means only a single bit can be send at any given time.This type of communication is called serial communication.This communication provides slow data communication.

Best Example :-
In the cinema hall has a single ticket booking counter,then it is a serial communication and if the cinema has multiple ticket booking counters then it is a parallel communication.

Definition Of Computer

Definition-

 The computer is an electronic machine made with electronic devices... It accepts the raw data through input device,processes it based on the set of instructions given(called Programs) and produces the information as output on the output device.The important feature of computers is its storage capability which can store the information and can be retrieved as and when required....


Characteristics Of Computer -

 computer are popular because of these following characteristics:
1- speed :

computer can perform a task much faster than a man.
2-Accuracy:

computer give accurate result compared to human.
3-Storage:

computer stores the information in the secondary memory and the same can be retrieved based on the requirement.
4-Multitasking:

computer performs multiple tasks simultaneously. For example,one can use the computer to take a printout of an inventory report and at the same time can use it to play song.
5-Communication :

computer can be used to exchange information between two or more computers.. Internet is the best example of this