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5.1 The internet and the World Wide Web (WWW)
| Candidates should be able to: | Notes and guidance ...……
Theo - 2026年5月25日 10:21
2.3 Encryption
Encryption Scrambles data for secure transmission. ... making data meaningless/unintelligible so it doesn’t make sense to hackers and other attackers. Uses an algorithm / key plain text is changed...……
Theo - 2026年5月18日 10:21
2.2 Methods of error detection
Explain how the data might have errors after transmission Data could be lost Data could be gained/added Data could be changed Bits could be reassembled in the wrong order Interference could occur ...……
Theo - 2026年5月18日 10:21
2.1 Types and methods of data transmission
Types and Methods of Data Transmission Data Packets Packet Structure Header Contains the IP address of the sender and the receiver The sequence number of the packet Size of the packet Payload ...……
Theo - 2026年5月18日 10:20
3.3 Data storage
PRIMARY STORAGE Main memory inside a computer Directly accessed by CPU, faster access than secondary storage both volatile and non-volatile Random Access Memory (RAM) is a hardware device allows...……
Theo - 2026年5月11日 12:13