Dell Inspiron 13z, Manual

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Network
Wireless Local Area Network (WLAN)
WLAN connects two or more computers with each other and the Internet
over the air waves rather than through a network cable connected to
each computer.
In a WLAN, a radio communications device (an access point or wireless
router) connects the networked computers and peripherals, and provides
Internet or network access. The access point or wireless router and the
wireless network card in the computer communicate by broadcasting
data from their antennas over the air waves.
Wireless Wide Area Network (WWAN)
WWAN is also known as Mobile Broadband network, is a high-speed
digital cellular network that provides Internet access over a much wider
geographical area than a WLAN, which typically covers only from 100
to 1000 feet. Your computer can maintain Mobile Broadband network
access as long as the computer is within a cellular-data coverage zone.
Contact your cellular/Internet service provider for coverage details.
Wireless Personal Area Network (WPAN)
WPAN helps interconnect wireless devices centered around your personal
workspace. WPAN technology supports communication over a short
distance. Bluetooth, used as the basis for a new standard, IEEE 802.15. is
an example of WPAN