Which of the following is a network that supports mobile communications across an arbitrary
number of wireless LANs and satellite coverage areas?
A.
LAN
B.
WAN
C.
GAN
D.
HAN
Explanation:
A global area network (GAN) is a network that is used for supporting mobile communications
across an arbitrary number of wireless LANs, satellite coverage areas, etc. The key challenge in
mobile communications is handing off the user communications from one local coverage area tothe next.
Answer option B is incorrect. A wide area network (WAN) is a geographically dispersed
telecommunications network. The term distinguishes a broader telecommunication structure from
a local area network (LAN). A wide area network may be privately owned or rented, but the term
usually connotes the inclusion of public (shared user) networks. An intermediate form of network in
terms of geography is a metropolitan area network (MAN). A wide area network is also defined as
a network of networks, as it interconnects LANs over a wide geographical area.
Answer option D is incorrect. A home area network (HAN) is a residential LAN that is used for
communication between digital devices typically deployed in the home, usually a small number of
personal computers and accessories, such as printers and mobile computing devices.
Answer option A is incorrect. The Local Area Network (LAN) is a group of computers connected
within a restricted geographic area, such as residence, educational institute, research lab, and
various other organizations. It allows the users to share files and services, and is commonly used
for intra-office communication. The LAN has connections with other LANs via leased lines, leased
services, or by tunneling across the Internet using the virtual private network technologies.
WAN