1. By : Mariam Beirouty & sara al shalian.

2. LAN A local area network (LAN) is a computer network that connects computers and devices in a limited geographical area such as home, school, computer laboratory, office building, closely positioned group of buildings, or an airport. Example :The router At home.

3. WAN WANs are used to connect LANs and other types of networks together, so that users and computers in one location can communicate with users and computers in other locations Example : The Network Around The World Which Is Internet.