Switching And Switching Techniques In Data Communication

 Switching Techniques

Switching techniques are used for transmitting data across networks. Different types of switching techniques are employed to provide communication between two computers. Which Are

Circuit Switching

Circuit switching is a methodology of implementing a telecommunication network in which two networks establish (circuit), a dedicated communication channel first through the network, and then the message is transmitted through the channels. The main advantage of circuit switching is guaranteed delivery. The circuit switching guarantees the full bandwidth of the channels and remains connected for the duration of the communication session.

                   The defining example of a circuit-switched network is the early analog telephone network. When a call is made from one telephone to another, switches within the telephone exchanges create a continuous wire circuit between the two telephones for as long as the call lasts.

Message Switching

Message switching is a network switching technique, in which data is routed entirely from the source node to the destination node. In this technique, no physical path is established between source and destination in advance.                                                                                                                                                             During message routing, every intermediate switch in the network stores the whole message. If the entire network's resources are engaged or the network becomes blocked, the message switched network stores and delays the message until some resource becomes available for effective transmission of the message.

Packet Switching

In packet-based networks, the message gets broken into small data packets. These packets are sent out from the computer and they travel around the network seeking out the most efficient route to travel as circuits become available.

             This does not necessarily mean that they seek out the shortest route. The main advantage of packet switching is that the packets from many different sources can share a line, allowing for very efficient use of the communication medium

In message switching, data packets are stored on the disk while in packet switching, all the packets of fixed size are stored in the main memory, making it more efficient as compared to other switching techniques.