There r two main differences between LAN & WAN: 1) network having fast speed at least 10 mbps is called lan while wan has slow speed as 64 kbps. 2) wan connects two lan far apart to each other using wan technologies such as leased lines, internet, frame relay, etc. while lan connects two systems/lans near to each other through ethernet/fast ethernet/gigabit ethernet.
No
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.
WAN. LAN is a short range connection, WAN is wide range.
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
WAN requires the same technology as LAN.
Extranet is wan
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
if the LAN is connected to another LAN over a wide distance using point to point links then it becomes part of the WAN (but it doesn't become a WAN by itself).
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.