1. What is a Network? A network connects two or more devices so they can share data and resources (files, printers, internet). Types LAN (Local Area Network): Home, office, school MAN (Metropolitan Area Network): City-wide WAN (Wide Area Network): Internet, large corporate networks 👉 Foundation of everything else below --- 2. Switch A switch connects devices inside a LAN and forwards data based on MAC addresses. Types Unmanaged: Plug-and-play, no configuration Managed: Full control (VLANs...