Which QoS component alters a packet to change the way that traffic is treated in the network?
A . Marking
B . Classification
C . Shaping
D . Policing
QoS Packet Marking refers to changing a field within a packet either at Layer 2 (802.1Q/p CoS, MPLS EXP) or Layer 3 (IP Precedence, DSCP and/or IP ECN).