LAN (Local Area Network): A network that allows multiple computers (or other capable devices) to connect with each other in a small area of promixity. Such a network is commonly used in house holds, schools, restaurant establishments, and office buildings.
WAN (Wide Area Network): A network that allows for communication/connection of multiple sources (computers or other capable devices) over a large area of proximity. Such a network is commonly used for businesses giving employees data accessibility from anywhere they could access the network.
Wi-Fi (Wireless Fidelity): A technology that gives computers and other capable devices the ability to connect to the internet and partake within activities that involve wireless data transfers. In order to connect to Wi-Fi the respective device must connect through an available wireless access point.