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802.11 Networks and its uses

Hi all,

Today we are going to see the intro for the application of internet working:

 The 802.11 is basic networking protocol which has comes for wireless netowrks.we have categorized these  802.11 into different types as below:

Applications
802.11
802.11b
802.11g
802.11a
Frequency
2.4 GHz ISM band
2.4 GHz ISM band
2.4 GHz ISM band
5 GHz UNII bands
Spread spectrum technology
FHSS or DHSS
DSSS only
ERP-OFDM and DSSS are essential
OFDM
Rate
1997
1999
2993
1999
Data Rates
1,2 Mbps
1,2,5.5 and 11 Mbps
DSSS: 1,2,5.5 and 11 Mbps
OFDM : 6,12 and 24 Mps
PBCC: 22 and 33 Mbps
6,12, and 24 Mbps
Also supports 9,18,36,48 and 54 Mbps.

Now we will see about the 802.11d

The 802.11 defines the FHSS (frequency hopping mechanism) and its parameters varies from one country to other and hopping patterns.
we will see some of the common terms and will see more detailed about 802.11 in the next post.

 DNS - Domain name server
HTTP - Hyper text transfer protocol
ICMP- Internet common message protocol

EAP - Extensible authentication protocol
CCK - complimentary code keying
HCCA- Hybrid co-ordination function controlled access.
HCF - Hybrid co-ordination function.
ISM - Industrial, scientific and medical
IAPP- Intenet access point protocol
DFS- Dynamic frequrncy selection
TKIP - Temporary key integrity protocol
VoIP - Voice over Internet Protocol
WDS - Wireless distributon system.
MIMO -Multiple-input-multiple-output
PBCC- Packet binary convolutional coding.
VPN - virtual private network
WLAN - wireless LAN
DSSS - Direct sequence spread spectrum.
FHSS - Frequrency hopping spread spectrum.
OFDM - Orthogonal frequency division multiplexing
900 MHZ ISM band
The 900 MHz band is 26 MHz wide and spans from 1902 MHz to 928 MHZ.The band was used for the wireless networking; most wireless networking uses higher frequencies which are capable of higher throughput.The ISM 900MHz is rarely used for networking, many products such as wireless telephones and radio cards do not operate in 900 MHz  ISM band.

Wireless networking topologies :
1. Wireless wide area netowork (WWAN)
2. Wireless metropolitian area network (WMAN)
3. Wireless personal area network (WPAN)
4. Wireless local area network (WLAN)

kindly send us feedback and comments

Thanking you
Vinoth Kumar Sritharan

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