Networking(DCCN): Need of Data communication and Networking?

3. Need of Data communication and Networking?
ans:

Signal generation
Interfacing
Synchronization
Exchange Management
Transmission System
Error Detection and Correction
Flow Control
Addressing
Routing
Message formatting
Distributed data base
Cheap and efficient data transmission over long distances
Provides robust communication infrastructure
Enables e-commerce, e-governance, e-services

Signal generation: If you want to send the data to some other location , our device should generate and receive the signal.

Interface: A device must have interface with the transmission system in order to communicate.

Synchronization: whenever two or more devices are sending the data at a time to targeted device, one device should wait, until first divice ends the signal so receiver should know when the transmission of data starts , when it ends.

Exchange Management: for data transmission exchange the resource should be done in efficient manner

Message Formatting: which explains the data can be sent on which format i.e audio or video, text etc

Transmission System Utilisation: it refers to the need to make efficient use of transmission channel, which are generally shared by many communicating devices, various techniques (multi-plexing) are available to allocate the total capacity of a transmission channel among connected devices. Care should be taken to avoid probable

Error Detection and Correction: It is used to correct the data while transmitting from one computer to another computer. It is may not important in case of telephonic conversation.

Flow control: If there is a flow control mechanism is there between the two communication devices, data transmission generates faster than the receiver.

Addressing: when more than two devices share a transmitting facility, source device and destination device should have the identity(or address)

Routing: the routing requires to transmit the data destination

Data communication & networking is needed because it offers cheapest means of data services, allows to share resources and so on.