Refer to the exhibit.
Which plan must be Implemented to ensure optimal QoS marking practices on this network?
A.As traffic traverses MLS1 remark the traffic, but trust all markings at the access layer. B.Trust the IP phone markings on SW1 and mark traffic entering SW2 at SW2. C.Remark traffic as it traverses R1 and trust all markings at the access layer. D.As traffic enters from the access layer on SW1 and SW2. trust all traffic markings.正确答案B
