LAN is local area network, which is pretty much inside the building. WAN is wide area network or connections from building to building, which could be a few feet or many miles.
The purpose is to allow communications to occur between buildings long distances apart, but within the same company.
WANs
Similarities between LANS and WANS is that they are both networks and can cover small geographical areas.
Yes, it can.
Intranet
You can join LANs and WANs with a Hub, Router, Switch, Gateway, Bridge, Network Interface Card (NIC) and a WAP (Wireless Access Point)..
The Internet links LANs and WANs together.
lans are more faster than wans
Types of networks - including LANs, WANs and WLANs
Gilbert Held has written: 'Internetworking LANs and WANs' -- subject(s): Protected DAISY
Security. WANs connect buildings together, LANs are inside of buildings. They are similar but not the same. If you don't have more than one location, you don't need a WAN.
WAN ( Wide Area Network )
For WANs depending on the protocol the packets can be very different. For LANs, the ring topology insists on special packets proceeded by a "token".