Unit 2 Business Level 3 Unit 1 Local Exchange

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Unit 1. Exercise 1. Local Exchange Data travels across the internet in packets. Around these packets is a wrapper with a header and a footer. The information contained in the wrapper tells computers what kind of data is in the packet, how it fits together with other data, where the data came from and the data's final destination. When you connect with someone on an online game, the information breaks up into packets that travel across the network. Different packets from the same information do not have to follow the same path. That's part of what makes the Internet so robust and fast. Packets will travel from one machine to another until they reach their destination. As the packets arrive, the computer or gaming system receiving the data

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