confirmed C is correct
By default, the Nexus 5000 Platform as well as other vendor’s FCoE products have decided on COS value of 3 for FCoE traffic. When FCoE is enabled on the Cisco Nexus 5000 Series switch, COS 3 is automatically configured for no-drop service (PFC setting) as well as a guarantee of 50% of the bandwidth in the case of congestion (ETS setting). It is best practice to leave the default COS value of 3 for FCoE traffic due to the agreement between vendors to support this as a “no-drop” class.The minimum guaranteed bandwidth for FCoE traffic is 50%. The FCoE can use all/free bandwidth if it is available.
Correct Answer: C
Reference:
https://es.wikipedia.org/wiki/IEEE_802.1p
upvoted 3 times
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