Computer ScienceExam code: 0984
Internet and Networking
Internet and Its Uses
A computer network is two or more computing devices connected together so they can share data and resources.
A network can be as small as two phones paired by Bluetooth, or as huge as the global internet linking billions of devices. Networks are usually grouped by their size and scope:
| Type | Stands for | Scope | Typical example |
|---|---|---|---|
| LAN | Local Area Network | A single building or site | A school's network; a home Wi-Fi network |
| WAN | Wide Area Network | A large area, possibly worldwide | The internet itself; a company's offices linked across cities |
This topic focuses on how networks are built and addressed: the hardware that connects devices, the addresses that identify them, and the that control how they talk.