13th Lecture - Networking - Wireless Lans

[k2s]

Will go thru over basic Wireless technologies:

1) WLAN Regulation & standards
2) IEEE 802.11a,b,g,n standards
3) 802.11 Comparison
4) WLAN Security*

All can download the book from : [url="http://www.megaupload.com/?d=1JKIQKCU"]http://www.megaupload.com/?d=1JKIQKCU[/url]
Refer to Chapter 6-3

[jai jagan]

s sir

[robo]

mari nuvem cheptav

[k2s]

[quote name='ROBO' timestamp='1319493355' post='3027355']
mari nuvem cheptav

[/quote]

aa book reference kosam ahey.......

[robo]

[quote name='k2s' timestamp='1319493627' post='3027363']

aa book reference kosam ahey.......
[/quote]

start

[k2s]

[quote name='ROBO' timestamp='1319493673' post='3027367']

start
[/quote]

vere janalu evvaru raara ???

[tom bhayya]

[tom bhayya]

mastaaru meeru ila schedule lekunda classes theesukonta pilla kayalu ela follow avuthaaru... sai ki PM petti oka section create cheyinchukondi.. andhulo mee classes cheppandi.. pillalu aa section loki velli refer chesukuntaaru.. ila discussions lo vesthey adhi ekkado samudram lo kottuku pothundhi.. evariki use vundadhu...

[robo]

[quote name='k2s' timestamp='1319493757' post='3027370']

vere janalu evvaru raara ???
[/quote][img]http://i45.tinypic.com/dh7gv5.gif[/img]

nene rendhu ids tho reply icha ga

indaka nenu okadine chustuna nuv kuda lev [img]http://i45.tinypic.com/dh7gv5.gif[/img]

[k2s]

[quote name='Alexander' timestamp='1319493924' post='3027378']
mastaaru meeru ila schedule lekunda classes theesukonta pilla kayalu ela follow avuthaaru... sai ki PM petti oka section create cheyinchukondi.. andhulo mee classes cheppandi.. pillalu aa section loki velli refer chesukuntaaru.. ila discussions lo vesthey adhi ekkado samudram lo kottuku pothundhi.. evariki use vundadhu...
[/quote]



vallu cheyyaru baa..... nenu adigi pichi vadini ayyanu...... may be mee request accept chesthey........ meeru andaru kalisi.... request cheyyandi

[k2s]

Ok guys starting my lecuture.:

Starting with Frequency bands:

[img]http://i54.tinypic.com/dqfxxe.png[/img]



There are three unlicensed bands: 900 MHz, 2.4 GHz, and 5.7 GHz. The 900-MHz and
2.4-GHz bands are referred to as the industrial, scientific, and medical (ISM) bands, and the
5-GHz band is commonly referred to as the Unlicensed National Information Infrastructure
(UNII) band.



Unlicensed frequency bands do not require a license to operate wireless equipment

[k2s]

Radio frequencies are radiated into the air by antennas that create radio waves. When radio
waves are propagated through objects, they may be absorbed by some objects (for instance,
walls) and reflected by other objects (for instance, metal surfaces). This absorption and
reflection may cause areas of low signal strength or low signal quality.

The transmission of radio waves is influenced by these factors:
Reflection: Occurs when radio frequency (RF) waves bounce off objects (for example,
metal or glass surfaces).

Scattering: Occurs when RF waves strike an uneven surface (for example, a rough surface)
and are reflected in many directions.

Absorption: Occurs when RF waves are absorbed by objects (for example, walls).

[robo]

[tom bhayya]

[ToughGuy]

thanks carry onnnnnnnn