WAN, LAN, VPN and Beyond: A Plain-English Guide to Network Types

Networking infrastructure is broadly categorized into several types based on geographic scale and purpose, ranging from Personal Area Networks covering a few meters to Global Area Networks spanning continents. A LAN connects devices locally and assigns local IP addresses, while a WAN links multiple LANs together — the Internet being the most well-known example. VPNs create encrypted tunnels that make a device appear connected to a different network, with three main variants: Site-to-Site, Remote Access, and SSL VPN. Less commonly tested network types include the MAN, which connects multiple LANs across a city using high-speed fiber links, and the GAN, which links multiple WANs for worldwide corporate connectivity. These distinctions matter for understanding how data travels across different scales of infrastructure, from a Bluetooth-paired device to an international undersea cable network.