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Which configuration sets a minimum quality of service on a Layer 2 access switch?
Correct Answer: A
Explanation/Reference: Explanation: The mls qos cos override interface command must be used to ensure that untrusted CoS values are explicitly set 0 (default). Reference: http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/QoS- SRND- Book/QoSDesign.html