WANs often connect multiple smaller networks, such as local area networks (LANs) or metro area networks (MANs). The most popular connection means is through the Internet. . Some segments of the Internet, like VPN-based extranet, are also WANs in themselves. Finally, many WANs for corporations or research networks utilize dedicated lines or other connection means to connect these entire WANs.
WANs generally utilize different and much more expensive networking equipment than do LANs.
While LAN and WAN are by far the most popular network types mentioned, you may also commonly see references to these others:
- Wireless Local Area Network - a LAN based on WiFi wireless network technology
- Metropolitan Area Network - a network spanning a physical area larger than a LAN but smaller than a WAN, such as a city. A MAN is typically owned an operated by a single entity such as a government body or large corporation.
- Campus Area Network - a network spanning multiple LANs but smaller than a MAN, such as on a university or local business campus.
- Storage Area Network - connects servers to data storage devices through a technology like Fibre Channel.
- System Area Network - links high-performance computers with high-speed connections in a cluster configuration. Also known as Cluster Area Network.
