LAN = Local Area Network (this is local, in your own computer network)
WAN = Wide Area Network (this is wide, most of the time this means the internet)
LAN is internal. IE, your computer, router, modem. WAN is external, such as your computer, a server on the internet, a corporate database. Not to be confused with WLAN, which is wireless LAN
From the user's point of view, accessing a LAN or WAN is the same. If packets need to be forwarded from a LAN via a WAN connection that is taken care of automatically by the router.
No
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
LAN is the Local Area Network while the WAN is the Wide Area Network.
LAN users get access to internet or can communicate with others LAN connected to WAN.
An LAN card is a must if you wish to connect to a LAN but it is not required for WAN
LAN (Local Area Network) is different to a WAN (Wide Area Network) in that a WAN is a network that joins two different LANs. e.g. You may have two office, one in London and one in Manchester. They will have their own LANs. If they link their networks together it will become a WAN.
WAN requires the same technology as LAN.
Extranet is wan