ASSALAMOALIKUM,
HOPE EVERYBODY IS DOING FINE BY GOD'S GRACE. I AM WRITING SOME SIMPLE MAIN DIFFERENCES B/W LAN AND WAN, HOPE IT WILL HELP
.1)LAN is tied to a certain location(e.g within a building,

office or a campus or even can span several buildings) and

WIRELESS LAN is a high speed network that operates without the

hassle of wires, further lANs are available as either

BROADBAND(that uses analogue technology) or BASEBAND(that uses

digital technology) systems, Where as WAN is not tied to a

certain location .
2)LAN'S setup cost , relatively speaking is cheap so we can put

an extra couple of network points or devices on the network ,
but WAN'S setup cost is expensive.
3)Since LAN channel is typically privately owned by the

organization using the facility so it's more secure as compared

to WAN , that is controlled by a large company serving

millions.
4)In case of LAN ,besides file sharing hardware sharing is

possible as well but in case of WAN hardware sharing is not

possible.
5)In LAN , data rate is usually greater like Ethernet could run

upto 1000 Mbs, where as WAN's data rate is slow about a 10th od

lan's speed, since it involves increased distance and increased

number of servers and terminals etc.
6)In case of LAN , error rate is less and it's much easier to

manage LAN and to diagnose and remove errors as compared to WAN

, where error rate is high and error removal and diagnosis is

much difficult.
7)Traditionally, LANs make use of broadcast network

approach/techniques rather than switching approach/techniques

that are used by WANs.But now switched LANs (especially

switched Ethernet LANs,ATM LANs and Fibre channel LANs have

appeared.