Which two statements regarding to QoS marking are true? (Choose two)
Shaping is one of the ways that packets can be remarked
Class-based marking occurs after packet classification
802.1Q/p CoS bits and IP Precedence are both layer 3 marking fields
QoS marking establishes a trust boundary that scheduling tools depend on
MPLS EXP and DSCP are both layer 2 marking fields
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