This document discusses different types of networks: - Local Area Networks (LANs) connect devices within a small geographic area like a building using cables and have high speeds up to 100 Mbps. - Metropolitan Area Networks (MANs) extend across a city using both cables and wireless technology with ranges up to 100 km. - Wide Area Networks (WANs) connect multiple cities, countries, or continents over long distances using technologies like fiber optics, satellites, and microwaves.