Topic 1 · pp. 100–102 · Free
Topic Notes · Easy summaries with diagrams
Chapter 6 — Chapter 6 — Introduction to Computer Networks
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Topic 1 of 6
📘Easy summary
A computer network connects devices to share resources. Objectives: resource sharing (printers, files, Internet), data communication (email, chat), reliability/backup, cost saving, centralized management. Data communication is exchange of data between devices over a medium. Five components: sender, receiver, message, transmission medium (cable, fibre, wireless), protocol (rules). Encapsulation: each layer wraps data with its protocol header information before sending.
⭐Key points
- Five components.
🔬Diagram
🌿Real-life example
Sending a file to a shared printer.
💡Exam tip
- List components.
✅Quick check
1. Primary objective:
2. Encapsulation:
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