TWO TYPES OF COMPUTER NETWORK
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Wide Area Network (WAN), Local Area Network (LAN)
WIDE AREA NETWORK
http://dictionary.reference.com
a computer network that spans a relatively large geographical area
(
communications) A system consisting of a set of nodes that are
interconnected by a set of links, and generally covers a large
geographic area, usually on the order of hundreds of miles. Abbreviated
WAN.
(WAN) is a telecommunications network, usually
used for connecting computers, that spans a wide geographical area. WANs
can by used to connect cities, states, or even countries. WANs are
often used by larger corporations or organizations to facilitate the
exchange of data, and in a wide variety of industries, corporations with
facilities at multiple locations have embraced WANs. Increasingly,
however, even small businesses are utilizing WANs as a way of increasing
their communications capabilities.
Although WANs serve a purpose
similar to that of local area networks (LANs), WANs are structured and
operated quite differently. The user of a WAN usually does not own the
communications lines that connect the remote computer systems; instead,
the user subscribes to a service through a telecommunications provider.
Unlike LANs, WANs typically do not link individual computers, but rather
are used to link LANs. WANs also transmit data at slower speeds than
LANs. WANs are also structurally similar to metropolitan area networks
(MANs), but provide communications links for distances greater than 50
kilometers.
WANs
have existed for decades, but new technologies, services, and
applications have developed over the years to dramatically increase
their
efficacy for
business. WANs were originally developed for digital leased-line
services carrying only voice, rather than data. As such, they connected
the private branch exchanges (PBXs) of remote offices of the same
company. WANs are still used for voice services, but today they are used
more frequently for data and image transmission (such as
video conferencing).
These added applications have spurred significant growth in WAN usage,
primarily because of the surge in LAN connections to the wider networks.
A
Wide Area Network (WAN) is a network that covers a broad area (i.e., any
telecommunications network that links across metropolitan, regional, or national boundaries) using private or
public
network transports. Business and government entities utilize WANs to
relay data among employees, clients, buyers, and suppliers from various
geographical locations. In essence, this mode of telecommunication
allows a business to effectively carry out its daily function regardless
of location. The Internet can be considered a WAN as well, and is used
by businesses, governments, organizations, and individuals for almost
any purpose imaginable.
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LOCAL AREA NETWORK
http://tl.wikipedia.org
Ang LAN (mula sa Ingles:
local area network) ay isang klaseng
network ng kompyuter na sumasakop ng di-kalakihang lugar tulad ng isang bahay, opisina, o isang grupo ng mga gusali tulad ng isang kolehiyo.
Sa pamamagitang ng
ethernet ang mga
kompyuter ay nakakonekta sa pamamagitan ng mga wires sa isang
hub o switch. Ito ang bumubuo ng tinatawag na physical layer
ng isang network ng kompyuter. Bagamat karaniwang gumagamit ng ethernet
cards upang i-network ang mga kompyuter, magagamit din ang serial o parallel port ng mga kompyuter upang magpalitan ng impormasyon.
Kapag ipinag-interconnect ang mas marami sa isang LAN, ang mabubuo ay tinatawag na
Wide Area Network (WAN). Ang
router ay ginagamit upang ipagkonekta ang dalawa o mas maraming LANs.
http://dictionary.reference.com
local area network
noun
1.
a system for linking private telecommunications equipment, as in a building or cluster of buildings.
2.
Computers. a system for linking a number of microcomputers, terminals, work stations, etc. with each other or with a mainframe computer in order to share data, printers, information, programs, disks, etc.; usually confined to one office or building. Compare network ( def 6 ) .
local area network definition
networking (LAN) A data communications network which is geographically limited (typically to a 1 km radius) allowing easy interconnection of terminals, microprocessors and computers within adjacent buildings. Ethernet and FDDI are examples of standard LANs. Because the network is known to cover only a small area, optimisations can be made in the network signal protocols that permit data rates up to 100Mb/s. See also token ring, wide area network, metropolitan area network.. Usenet newsgroup: news:comp.dcom.lans.misc. (1995-03-13)
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