Cisco 400-051 Exam

Refer to the exhibit. What caused this message on a Cisco 9971 IP phone, connected to a Cisco 3750X PoE switch, when a mobile phone is plugged into the IP Phone’s back USB port?

  • A. The back USB port only supports Cisco USB devices such as a Cisco Unified Video camera
  • B. USB classes for this USB port are not properly configured
  • C. The USB port is not enabled by the administrator
  • D. The mobile phone is requesting more power than the USB port could provide
  • E. USB devices are not supported when the IP phone is powered by a Cisco PoE switch
Answer: Option D.

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