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There are two basic types of CDMA [Code Division Multiple Access]: FHSS [Frequency Hopping Spread Spectrum] and DSSS [Direct Sequence Spread Spectrum]. Direct Sequence is used in Wi-Fi-Wireless Fidelity or 802.11. Each Wi-Fi system uses the same set of frequencies in the 83.5 MHz of available frequencies available in the 2.4 GHz band. That is, the IEEE 802.11b standard defines 11 possible channels (frequencies bands) available for use numbered 1-11.

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