Refer to the topology diagram that shows a packet flowing from R1 to R6. using PHP operations within the MPLS domain.
Topology Diagram:

Drag and drop the router on the left to its correct description on the right.

R4 R5 R2 R3

performs a label pop operation R4 sends out an unlabeled IP packet R5 imposes a label to the incoming unlabeled IP packets R2 performs a label swapping operation R3