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What operation is performed by an LSR when it receives an MPLS labeled packet?
A. The LSR refers to its routing table and forwards the packet to the next LSR or LER without altering the MPLS label.
B. The LSR refers to its MPLS label table, swaps the label and forwards the packet to the next LSR or LER.
C. The LSR refers to its MPLS label table forwardsthe packet to the next LSR or LER without altering the MPLS label.