definition of wan,wlan and wan
Note: The acronym WAN is sometimes used to describe a wireless area network, though it's most often abbreviated as WLAN. Since WANs, by definition, cover a larger distance than LANs, it makes sense to connect the various parts of the WAN using a virtual private network (VPN).
Wide area network. A wide area network (WAN) is a telecommunications network or computer network that extends over a large geographical distance. Wide area networks are often established with leased telecommunication circuits.