Microsoft Word wlan security Assessment Countermeasures Final Draft Modified[1]



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FULLTEXT01
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Spectrum
**** **** **** Nob Narrowband

Microwave
****
**************
**
****************
* Yes unless ISM
2.3 WLAN SPECTRUM ALLOCATION
The infrared and spread spectrum wireless LAN technologies operate in ISM (Industrial, Scientific, and Medical) bands. This radio spectrum is unlicensed. The table below shows the ISM frequency bands.
Table 2 Showing 900 MHz, 2.4 GHz and 5 GHz ISM Bands.
ISM FREQUENCY BANDS

Frequency
(Lower Limit
)
Frequency
(Upper Limit)
Total
Bandwidth
Max Power
Max EIRP
902 MHz
928 MHz
26 MHz
1 Watt
4 Watt (+36 dBm)
2400 MHz
2483.5 MHz
83.5 MHz
1 Watt
4 Watt (+36 dBm) for multi-point,
200 W (+53 dBm) for point-to-point GHz
5.850 GHz
125 MHz
1 Watt (+30 dBm)
200 W (+53 dBm)
2.4 WLAN TOPOLOGIES
The IEEE 802.11 standard defines three basic topologies to be supported by the MAC layer implementation. These are
• Independent Basic Service Set (IBSS)
• Basic Service Set (BSS)
• Extended Service Set (ESS)

Wireless Local Area Network (WLAN): Security Risk Assessment and Countermeasures
Nwabude Arinze Sunday
- 10 -The 802.11 standard further defines the following two modes
• Ad hoc
• Infrastructure

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