A LAN has a limited length for distance, and for the number of clients that may be connected to it. If you exceed either, then you may need a longer connection distance, which is afforded by a WAN.
It isn't a question of suitability; it depends on where your clients are located. A LAN by necessity is a small geographic area. A WAN services clients over a wide area. So depending on the location of the client systems you may be using a LAN or a WAN.
freedom
why the lan high speed than wan
lans are more faster than wans
WAN communication speed, reliability, and connectivity are more challenging to manage than those of a LAN
WAN. LAN is a short range connection, WAN is wide range.
WAN usually costs more. Especially, there are recurring monthly costs, since you rent the services of an ISP. Note, however, that a LAN and a WAN serve different purposes; you can't simply replace a WAN with a LAN.
absolutely wan. lan is used for a office or a building complex
An LAN card is a must if you wish to connect to a LAN but it is not required for WAN
LAN users get access to internet or can communicate with others LAN connected to WAN.
WAN requires the same technology as LAN.
Extranet is wan
WAN