wide area networks vedant saran. what is wan? a wide area network(wan) is a network that spreads...
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Wide Area NetworksVedant Saran
What is WAN? A Wide Area Network(WAN) is a network
that spreads over a large area such as office companies in different countries.
Eg: The Internet
How does WAN work? WAN is basically formed by a number of
LANs being connected together through a router or a modem.
WAN vs LAN
WANWorks over large distances
Useful for voice
More expensive than LAN
Maximum speed of 150megabits per second
Difficult to set up
Needs a dedicated computer to direct traffic
LANCheaper than WAN
Maximum speed of 1000megabits per second
Easy to set up
Does not need a dedicated server
Connection Options
Many WANs are built for one particular organization and are private. These use fibre optic cables or private telephone wires. This has high security but is expensive
Others are built by Internet service providers (ISPs) and provide connections from an organization’s LAN to the Internet.This is very common�
Connection Options
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d lin
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dire
ct p
oint
to
poin
t co
nnec
tion
circuit
switching -
makes a circuit
between nodes
and
packet switching -
delivers packets of data
cell re
lay –
Similar to packet
switching
terminals
Evolution Of WAN WANs have existed for decades, but due
to new technology , its effect to improve business has grown drastically.
The wide area network has made it possible for companies to communicate internally in ways never before possible. Because of WANs, the consumers can enjoy benefits from companies that we wouldn’t have been able to in the past.
Existence of WANs WANs were originally made for services
carrying voice, not data. WANs are still used for voice services, but today they are used more frequently for data and image transmission (like videoconferencing).
Benefits of WAN Voice is cheap so it is useful for
overseas voice and videoconferencing Bandwidth is guaranteed Faster than internet for sending
resources. Protects data and stores and enable it
to be stored in a central server.
Bluetooth is an example of Wireless Personal Area Network(WPAN).
It creates wireless links between PDAs, mobile phones, computers, media players, printers and any other devices in the range.
Bluetooth- How does it work? Bluetooth uses spectrum transmission
or radio waves to provide wireless links between devices.
Advantages and Disadvantages
Freedom from cables Uses less batteryDoesn’t need line of sight.Its cheap and extremely popularStandard even with low end devices.Simple to use
Max speed of 1MBps
Security is not great
Short range
Drains battery of devices.
Uses of Bluetooth The uses of Bluetooth are unlimited: Make calls from a wireless headset connected
remotely to a cell phone. Eliminate cables linking computers to printers,
keyboards, and the mouse. Hook up MP3 players wirelessly to other machines
to download music. Turn on your computer when you walk close to it,
and turn it off when you leave. Use your phone as a PowerPoint clicker. Turn off ITunes when the phone rings.
Bibliography http://www.makeuseof.com/tag/technology-explained-
wide-area-network-wan-tutorial/ http://ptgmedia.pearsoncmg.com/images/
1587051486/samplechapter/1587051486content.pdf http://en.wikipedia.org/wiki/Wide_area_network http://compnetworking.about.com/cs/lanvlanwan/g/
bldef_wan.htm en.wikipedia.org/wiki/Bluetooth www.howstuffworks.com www.palowireless.com/infotooth/whatis.asp IGSCE Information and Computer Technolgy Text Book
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