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單項選擇題

You are troubleshooting a one-way call problem with a Cisco 7920 wireless IP phone on a standaloneWLAN.
What may have caused 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.

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