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Packet switching

Packet switching or "connectionless data transmission":
Packet-switching technology divides data into small pieces, known as packets, which are transmitted individually over a network connection, such as the 2G wireless network. Each packet is addressed to the same destination, but can take different routes of travel to arrive there. When all of a transmission's packets arrive at their destination, they are reassembled into the original message, and then delivered. Packet-switching protocols are used in situations where delays are acceptable, such as email and Internet content transmissions.

  • at start of transmission no need to worry about establishing a route;
  • ability to send data packets over any route means transmission
    can be more reliable;
  • completion of transmission can sometimes be subject to delays
    because packets may have to be received over different routes
    and must always be re-assembled into correct sequence

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