Which two statements about MPLS are true? (Choose two)

Which two statements about MPLS are true? (Choose two)
A . It can carry multiple protocols, including IPv4 and IPv6.
B . It uses labels to separate and forward customer traffic
C . It tags customer traffic using 802. 1q
D . It encapsulates all traffic in an IPv4 header
E . It provides automatic authentication

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Answer: AB