Technical Definition of LAN and WAN

The technical definition of LAN and WAN does not depend upon the Graphical Distance. So, we
can define LAN and WAN as follow:
The technology which we use for the communication on the Physical Layer and Data Link Layer decides whether we are doing LAN Communication or WAN Communication.

LAN (Local Area Network)
If we are using Ethernet Technology which run on Physical and Data Link Layer for the
communication between two computers even they are l00 kilometers far from each other then
it is called LAN (Local Area Networks).

WAN (Wide Area Network)
If we are using V,35, or EIA/TIA-232 which run on Physical Layer and PPP or HDCL Protocol on
Data Link Layer for the communication between two Computers even they are placed nearer to
each other it will be WAN (Wide Area Network).

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