It is all about latency and throughout of the network. Current infrustructure does not allow speeds close to LAN. But with fiber optic channels being implemented in many places, the speed can get as high as 1 Gbps (Google Fiber) for home users. And that is what you get in local SOHO network.
WAN. LAN is a short range connection, WAN is wide range.
absolutely wan. lan is used for a office or a building complex
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
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).
why the lan high speed than wan
wan wireless right?
ATM protocol is a WAN technology
LAN is live active network such as ps3 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.