Learning objectives
Describe the structure of a data packet as a packet header, a payload and a trailer, and state what the header holds, including the destination address and the packet number
Explain packet switching as the breaking of data into packets that may travel by different routes and are reassembled into the correct order at the destination
Compare serial with parallel transmission and simplex with half-duplex and full-duplex transmission, giving a suitable use for each and explaining why skewing can occur in parallel transmission
Describe the purpose of a Universal Serial Bus connection, and state the benefits and the drawbacks of using USB to attach a device to a computer
State the purpose of a network interface card, a MAC address, an IPv4 or IPv6 address and a router, and explain how a MAC address and an IP address differ in what they identify
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