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单项选择题 You are troubleshooting a one-way call problem with a cisco 7920 wireless ip phone on a standalone wlan. What may cause this problem？（）

A、the minimum data rate is not set to 11 mbps.

B、an address resolution protocol has been disabled

C、publicly secure packet forwarding is enabled

D、the access point is set to the least congested channel.

  • B

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