Dcs Networking Card

Understanding Wireless Networking

D. C. Sonkhla SDE Computer

Understanding Wireless Networking

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Multiple Access

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4 Way Handshake (Cont’d) Access Point

Laptop RTS CTS Data ACK brbraitt/dcsonkhla

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PCMCIA wireless card Used For Portables:

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PCI and USB adapters Used For Desktops: PCI adapter (inside)

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USB adapter (outside)

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1 Mbps DSSS 2 Mbps DSSS

5.5 Mbps DSSS

11 Mbps DSSS

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How much distance can be supported by one AP (802.11b) 50M  80M  120M  150M 

: : : :

11 Mbps 5.5 Mbps 2 Mbps 1 Mbps brbraitt/dcsonkhla

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How much distance can be supported by one AP (802.11g) 20M  40M  80M  100M 

: : : :

54 Mbps 27 Mbps 6 Mbps 1 Mbps brbraitt/dcsonkhla

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Setup #1

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Alternate Setup (Cont’d)

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Typical Wi-Fi Setup

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Way to Amplify WiFi Signals

A WiFi repeater is installed to extend coverage.

Wireless Access Point

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Infrastructure Required for Wi-Fi Security

Client

Access Point

Radius Server

Certificate Server brbraitt/dcsonkhla

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