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