Summary
Highlights
A LAN is a group of networks physically close to each other, like a floor in a building or a group of buildings. LANs are characterized by their high speeds compared to networks that are farther away.
A WAN connects locations over long distances, such as different cities, states, or countries. Due to the long distances, WANs are typically slower than LANs and can utilize various technologies like point-to-point serial connections, MPLS, or even terrestrial and non-terrestrial (satellite) networks.
A PAN connects devices close to an individual, often using technologies like Bluetooth, infrared, or near-field communication. Examples include connecting a phone to a car's audio system, wireless headsets, or health monitoring devices to a smartphone.
A MAN is a network that covers a single geographical area, like a city. Traditionally proprietary, MANs are increasingly standardizing on Metro Ethernet. Local governments may also build their own fiber-optic MANs.
A SAN is a high-speed network dedicated to providing block-level access to storage. It allows devices to access large amounts of data efficiently as if it were local storage. SANs are typically isolated networks connected to the main network via high-speed links due to the high data transfer demands.
A WLAN uses 802.11 technology to provide wireless connectivity within a local area. It allows users to move around and access network resources on mobile devices or laptops. The reach of a WLAN can be expanded by adding more access points.