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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1月12日 10:55
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 Data / plain text is ...……
Theo - 2026年1月12日 10:21
Pseudocode
剑桥IGCSE计算机科学 0478 Pseudocode 完整指南 按照从简单到复杂的顺序,系统地讲解每个语法结构,并提供循序渐进的练习例子。 📚 第一部分:变量与基本输入输出 1. DECLARE(声明变量) 语法: DECLARE <identifier> : <data type> 解释: 在使用变量前,需要先声明它的名称和数据类型。 常用数据类型: INT...……
Theo - 2026年1月8日 21:03
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1月5日 08:27
3.4 Network hardware
Internet Service Provider (ISP). Describe the role of an Internet Service Provider (ISP). - Provide access to the internet / dial up / broadband - Usually charge a monthly fee - Monitor usage - Gi...……
Theo - 2025年12月22日 07:56