What is LAN?
LAN stands for Local Area Network. It is a series of interconnected computers restricted to one site. Usually connected with a series of cables or wireless technologies or both.
What us WAN?
WAN stands for Wide Area Network. A series of internetconnected computers over more than one physical site ( area, town even a country ).
Inside a TESCO store, they will have a LAN network because it is only one site. But in TESCO's head office they will have the main computer…