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Juniper JN0-363 Practice Test 1
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Which two statements are correct about the service provider MPLS network shown in the exhibit? (Choose two.)
R3 will perform a label pop operation on the transport MPLS label.
Traffic from Network 1 to Network 3 and traffic from Network 1 to Network 4 each need their own unique label-switched path.
Traffic from Network 1 to Network 3 and from Network 1 to Network 4 can share the same label-switched path.
R3 will perform a label swap operation on the transport MPLS label.
In MPLS, multiple paths can be merged if they share the same egress router. In the given scenario, traffic from Network 1 to Network 3 and Network 4 can be engineered to follow the same label-switched path (LSP) within the MPLS network until they reach the last common point before diverging to their respective destinations.
As for R3 performing label operations, in a typical MPLS network, intermediate routers (like R3) perform label swapping. They replace the incoming label with a new label before forwarding the packet along the LSP. A label pop operation is typically performed by the egress router in the case of an ultimate hop pop (UHP), where it removes the MPLS label before delivering the packet to the final destination outside the MPLS domain.
Juniper Networks Technical Documentation on MPLS
Understanding MPLS Label Operations (Swap, Push, and Pop) - Juniper Networks
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