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

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Figure 2 Frequency hopping
Source: WLANA
65
• Direct Sequence Modulation: This method uses a wide frequency band together with Code Division Multiple Access (CDMA). Signals from different units are transmitted at a given frequency range, and at a very low power. A code is transmitted with each signal so that the receiver can identify the appropriate signal

Wireless Local Area Network (WLAN): Security Risk Assessment and Countermeasures
Nwabude Arinze Sunday
- 8 - transmitted by the sender unit. The frequency at which such signals are transmitted is called the ISM (industrial, scientific and medical) band. This frequency band is reserved for ISM devices. The ISM band has three frequency ranges 902-928, 2400-2483.5 and 5725-5850 MHz.

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