The term "WAN" is commonly used when describing which of the following networks?

Mesh describes a network topology where nodes interconnect redundantly, and it is not a network scope category like WAN or LAN.

A local Wi-Fi network is a Wireless LAN (WLAN), which is limited in geographic scope to a building or campus, not a WAN.

The Internet is the definitive real-world example of a WAN because it interconnects millions of networks across global geographic distances using public infrastructure such as fiber optic lines, submarine cables, and satellite links. WAN technology and terminology are most commonly discussed in the context of Internet connectivity.

An ad hoc Wi-Fi network is a peer-to-peer local wireless connection between devices in close proximity, which is the opposite of a wide area network.