There really two different things.LAN is Local, think inside the building.WAN is Wide Area Network, think connections between buildings, but inside the same company.
A PAN is a network that is personal in nature, meaning that its distance between sender and receiver is limited, usually no more than 30 feet. Bluetooth technology is an example of PAN network...
According to WAN Network we can communicate with different networks whoes
"net id" is unique.,
WAN provide the facility to communicate in long distance for the purposes of sharing information,i.e...