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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 have caused this problem？（）

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

B、publicly secure packet forwarding is enabled.

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

D、an address resolution protocol has been disabled.

  • D

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