A WAN spans a large geographic area, such as a
state, province or country. WANs often connect multiple smaller networks, such
as local area networks (LANs) or metro area networks (MANs).
For home routers the port the router connects to your Internet
connection is often labeled as a WAN, Networkor Internet port,
since it is what allows your home network to communicate with the Internet
network. In the below picture, is an example of the Internet port on the back
of a home router, next to four standard Ethernet ports.
Numerous WANs have been constructed, including public packet
networks, large corporate networks,...
