The document describes an experiment on connecting computers in a wide area network (WAN) using Cisco Packet Tracer. The experiment involves 19 computers, 7 switches, 1 router, 2 servers, 2 clouds, and various connection types. It defines a WAN as a network that aggregates different link types and speeds across large geographic areas like cities and countries. There are two main types of WANs: switched and point-to-point. The largest example of a WAN is the Internet, and other examples include bank ATM networks.