1.3 Exchanging data
This section introduces students to different systems and how data is exchanged between them. Areas covered include:
* Flat files and relational databases
* Different types of keys
* Capturing, selecting, managing and exchanging data
* Networks, protocols, standards and security
* The structure of the internet, including TCP/IP, DNS, LANs and WANs and switching
* HTML, CSS, JavaScript and search engines
* Lossy and lossless compression
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