1. **Geographical Area:** A LAN covers a small geographical area, such as a single building or a school campus, whereas a WAN covers a large geographical area, such as a country or even the entire world (like the internet).
2. **Infrastructure Ownership:** The infrastructure for a LAN (cables, switches, routers) is typically owned and managed by a single organisation. In contrast, a WAN often uses infrastructure leased from telecommunications companies, such as public telephone lines or satellite links.
LANs and WANs are two primary types of computer networks, and they differ in several key aspects:
1. **Geographical Scope:** This is the most fundamental difference. A **LAN (Local Area Network)** is confined to a small, limited geographical area like a single office building, a school, or a home. A **WAN (Wide Area Network)** spans a large geographical area, connecting multiple LANs together over cities, countries, or even continents. The internet is the largest example of a WAN.
2. **Ownership of Infrastructure:** The hardware and cabling for a **LAN** are usually privately owned and maintained by the organization that uses it. For a **WAN**, the infrastructure that connects the different sites (such as fibre optic cables, satellite links, or telephone lines) is typically leased from a public telecommunications provider (like BT or Virgin Media).
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