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Groupmembers:

1.Chetnayadav (roll no

57)

2.Monica jain

(roll no 20)

Submitted to:Mr. Arvind kukreti

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WHAT IS A WIRELESS

NETWORK?DEFINITION: It is use of Radio frequency(RF)

technology to connect workstations in a local

area network(LAN)or LANs in a wide areanetwork(WAN).

Main Components: wireless access point andwireless clients.

CONNECTION : without wires

TRANSMISSION MEDIA : electromagneticwaves

IMPLEMENTATION : physical level

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WIRELESS DEVICES IN A

NETWORKPERFORMS SAME FUNCTIONS AS THAT OF WIRED ONES. TYPES OF WIRELESS DEVICES IN DAILY LIFE:1.LAPTOP.

2.USB.

3.CELLPHONES.4. RADIO .

5.WIRELESS REMOTE CONTROL.SOME WIRELESS COMPUTER NETWORKING DEVICES :a. WIRELESS GATEWAY.

b .WIRELESS ROUTERS.

c. WIRELESS BRIDGE.d. WIRELESS NETWORK INTERFACE CARD.

e. WIRELESS MODEMS.

f. WIRELESS HUB.

g. WIRELESS SWITCHES.

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WIRELESS

DEVICES2 basic forms of technology is used1.Frequency-hopping spread spectrum (FHSS)

Uses narrowband carrier

Properly synchronizedShort-duration impulse noise

2. Direct-sequence spread spectrum(DSSS)

Generates a redundant bit pattern

Statistical techniques are embedded

Low power wide-band noise

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SOME OF THE BASIC WIRELESS

DEVICES

WIRELESSROUTERS

WIRELESSNETWORKINTERFACE CARD

WIRELESSBRIDGES WIRELES

SMODEMS

http://images.google.co.in/imgres?imgurl=http://jbetronics.com/zen-cart/images/Wireless%2520Routers.gif&imgrefurl=http://jbetronics.com/zen-cart/index.php%3Fmain_page%3Dindex%26manufacturers_id%3D116%26sort%3D20a%26filter_id%3D%26alpha_filter_id%3D56&usg=__B67dR1j2qhNlWYRVaNdWhs0zG1A=&h=300&w=300&sz=16&hl=en&start=5&tbnid=huQh4evMsxv-0M:&tbnh=116&tbnw=116&prev=/images%3Fq%3Dwireless%2Brouters%26gbv%3D2%26hl%3Denhttp://en.wikipedia.org/wiki/File:USB-wireless-adapter.jpghttp://en.wikipedia.org/wiki/File:Option_GT_3G%2B_UMTS_card.jpg

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1.WIRELESS ROUTERS

DEFINITION :

- electronic network device.

- uses wireless technology.- forwards packets to its final destinationCharacteristics of a wireless router: LAN ports.

WAN ports. Wireless antennae.Wireless router technology.

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CLASSIFICATION OF ROUTERS :

A.EDGE ROUTERSB.CORE ROUTERS

C.SUBSCRIBER EDGE ROUTERS

DESKTOP OR NOTEBOOK PC

ROUTER

CABLE / DSL

MODEM

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How does the wireless router works?

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A.Introduction - Definition a) a network card to connect device

using

wireless technology in acomputer network.

b) connects to a wire basednetwork.

implemented in OSI Model layer. mainly used in wireless Desktop computer.

B. Modes of operation -

operates in two modes a) infrastructure mode.b) ad hoc mode.

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C. Specifications used : Wireless data transfer rates. Wireless transmit power. Wireless standards used.

D. Range - gets affected by objects in the way of the signa

. large electrical appliances impede a

wireless signal. there are two types of range : a- theoretical

range.b- effective

or actual range.

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WORKING :

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Introduction-- Definition a hardware component to connect network

segments.

- is a software device for some operating systems.- Commonly seen in protocols.- Works in pair [(p-p) or (p-m)].

Setup-- connect to a service set identifier and radio channel.

- referred to propagation of data.

- a colloquial term.

- in different layers of OSI MODEL it works differently and has different name.

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Working - -can be connected to a wired NIC .

- can be expensive.- also uses extra cables

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Introduction -a) definition: type of modem which connects to a wireless network.b) instead of telephone lines.

c) Connects to ISP.

Types of devices used:> Mobile phones, smartphones, andPDAs.> Wireless FireWire, USB and Serial modems.

Service providers o Indian providers :-

a. BSNL f. Reliance Mobile.

b. VSNL g. Virgin Mobile India.

c. Airtel

d. Vodafone Essar

e. Tata Indicom

http://en.wikipedia.org/wiki/Mobile_phonehttp://en.wikipedia.org/wiki/Smartphoneshttp://en.wikipedia.org/wiki/PDAhttp://en.wikipedia.org/wiki/Indiahttp://en.wikipedia.org/wiki/BSNLhttp://en.wikipedia.org/wiki/VSNLhttp://en.wikipedia.org/wiki/Airtelhttp://en.wikipedia.org/wiki/Vodafone_Essarhttp://en.wikipedia.org/wiki/Tata_Indicomhttp://en.wikipedia.org/wiki/Tata_Indicomhttp://en.wikipedia.org/wiki/Vodafone_Essarhttp://en.wikipedia.org/wiki/Airtelhttp://en.wikipedia.org/wiki/VSNLhttp://en.wikipedia.org/wiki/BSNLhttp://en.wikipedia.org/wiki/Indiahttp://en.wikipedia.org/wiki/PDAhttp://en.wikipedia.org/wiki/Smartphoneshttp://en.wikipedia.org/wiki/Mobile_phone

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Working connected via satellites.

wireless network is established using wireless router.

Below is the working of a wireless modem with the help of diagram

ETHERNET

DSL cable

Modem

Router

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Device manufacturers:1. LG ELECTRONICS

2. MOTOROLA

3. RIM (BLACKBERRY)

4. SAMSUNG

5. SONY ERICSSON

Technology used :1. GPRS (2.5G)

DATA RATES

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ADVANTAGES :1 . LOW COST.

2. FAST TRANSMISSION.

3. SIMPLE TO INSTALLL.4. BETTER THROUGHPUT.

5. MOBILITY.

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THANK

YOU !!!