Wide Area Networks Vedant Saran. What is WAN?  A Wide Area Network(WAN) is a network that spreads over a large area such as office companies in different.

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Presentation transcript:

Wide Area Networks Vedant 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 WAN Works over large distancesUseful for voiceMore expensive than LAN Maximum speed of 150megabits per second Difficult to set up Needs a dedicated computer to direct traffic LAN Cheaper than WAN Maximum speed of 1000megabits per second Easy to set upDoes 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 leased line - direct point to point connection circuit switching - makes a circuit between nodes and packet switching - delivers packets of data cell relay – 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Existence of WANs  WANs were originally made for services carrying voice, not data.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 battery Doesn’t need line of sight. Its cheap and extremely popular Standard 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  explained-wide-area-network-wan-tutorial/  /samplechapter/ content.pdf   n/g/bldef_wan.htm  en.wikipedia.org/wiki/Bluetooth    IGSCE Information and Computer Technolgy Text Book