Wikipedia: "Wide Area Network"
A Wide Area Network (WAN) is a computer network that extends over a large geographical distance. Read this article for more details about WANs. There are many different kinds of WAN, such as ATM, Cable, Dial-up, DSL, Frame Relay, ISDN, Leased line, SONET, X.25, and SD-WAN, to name a few.
Click https://en.wikipedia.org/wiki/Wide_area_network link to open resource.