When any information moves across the internet – whether a webpage, file or email – this information is broken down into tiny packets of information. These packets can be sent via different routes to their destination – this is more eficient as it can make up for different bandwidths along the way.

A packet is made up of the header, which contains information about the packet; the payload, or data the packet is actually delivering; and the trailer, which marks the end of the packet and can also can check the packet has not been corrupted en route. The packet is moved along to its destination via routers. At the other end, the message is reassembled.

By Sarah at UK Broadband Finder
Read my Broadband Glossary disclaimer

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