Which field in the MPLS shim header is used to support different QoS markings?
A.
 IP precedence
B.
 DSCP
C.
 EXP
D.
 ToS
E.
 S
F.
 Label
Explanation:
MPLS EXP Marking
The three MPLS EXP (experimental) bits in the shim header of an input or output MPLS packet
header may be set or changed by a user configured value