Which spread spectrum technology does the 802.11b standard define for operation?（）A、IRB、DSSSC、FHSSD、DSSS and FHSSE、IR, FHSS, and DSSS
Which spread spectrum technology does the 802.11b standard define for operation?（）
- A、IR
- B、DSSS
- C、FHSS
- D、DSSS and FHSS
- E、IR, FHSS, and DSSS
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名词解释题Spread Spectrum扩展频谱