Networks are topologies that connects computers over a large area.
LAN's are normally networks where data is shared such as work offices. WAN's are networks that cover larger areas, a typical WAN being the Internet. These packets include the address of the receiving computer, a sequence number, error correction information, and a small piece of the data. A packet-switching protocol for connecting devices on a Wide Area Network. Asynchronous Transfer Mode is a network technology based on transferring data in packets of a fixed size.