What speeds must be disabled in a mixed 802.11b/g WLAN to allow only 802.11g clients to connect?（）A、6，9，12，18B、1，2，5.5，6C、5.5，6，9，11D、1，2，5.5，11
What speeds must be disabled in a mixed 802.11b/g WLAN to allow only 802.11g clients to connect?（）
- A、6，9，12，18
- B、1，2，5.5，6
- C、5.5，6，9，11
- D、1，2，5.5，11
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