To ensure ProfiNET Layer 2 Class-of-Service markings from ProfiNET devices are trusted by the switch, which command must be entered on the interface attached to the device?

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To ensure ProfiNET Layer 2 Class-of-Service markings from ProfiNET devices are trusted by the switch, which command must be entered on the interface attached to the device?
A . switch(config-if)#mls qos trust cos
B . switch(config-if)#qos trust cos
C . switch(config-if)#profinet cos trust
D . switch(config-if)#trust qos cos

Answer: A

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