Packet Switching Protocol

444 WordsFeb 4, 20182 Pages
Packet switching: In packet switching technique messages are divided into packets before transmission. Each data packet is transmitted individually and can even follow different routes to its destination. After all the packets forming, the message arrive at the destination is recompiled into the original message. Example: Examples of packet switching protocol are:  Modern wide area network (WAN)  TCP/IP  X.25, and frame relay Methodology: Transmission side:  In packet switching the data to be sent is broken up into lots of small 'data packets'. For example a 2MB file would be broken up into chunks of 512 bytes in size.  Before transmission the packet contains the ‘header’ that has network IP address that it needs to arrive at and also details of the IP address from which it was sent.  Moreover the header also allots a number to each packet and records how many packets the data was split up into.  After leaving the computer the packets start to head off in different directions taking the least busy path at that instant.  The router figures out which is the next fastest connection and sends each packet on its way. This technique works extremely well, because if one branch gets busy then the packets are automatically routed through another path. Receiving side:  As on the transmitting side the packets were given a number so when the packets arrive at their destination, they are put back together again in the right order.  Moreover the
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