In which three frequency bands does the Cisco Spectrum Expert Wi-Fi tool perform spectrumanalysis？ （）
- A、ISM 2.4 GHz
- B、ISM 900 MHz
- C、ISM 5 GHz
- D、public safety 4.9 GHz
- E、GSM 1.9 GHz
正确答案:A,C,D
答案解析:有
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In which three frequency bands does the Cisco Spectrum Expert Wi-Fi tool perform spectrumanalysis？ （）
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