A service provider has configured penultimate hop popping (PHP) on their MPLS network. A packet traverses an LSP with three LSRs: ingress, transit (penultimate), and egress. What label operation does the penultimate router perform on the packet?

It pushes an additional label onto the packet and forwards it to the egress router.

It pops the label and forwards the IP packet to the egress router.

It swaps the label with a new label and forwards the packet to the egress router.

It forwards the packet without any label operation, relying on the egress to pop the label.

What information is found in an LFIB entry for a transit LSR?

Destination IP prefix and outgoing interface

Incoming label, outgoing label, outgoing interface, and next hop

Outgoing label and the TTL value

Incoming label and the original IP packet

What does an ingress LSR use to classify an incoming IP packet before pushing the initial MPLS label?

The IP routing table and forwarding equivalence class (FEC)

Juniper NetworksCertified Specialist, Service Provider Routing and Switching (JNCIS-SP)

Domain 7Objective 3

End-To-End Packet Flow and Forwarding JN0-364 Practice Questions (Page 2)

Part of the Multiprotocol Label Switching (MPLS) domain, which makes up ~16% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~6–10 in this domain), expect 1–1 from this objective — we provide 28 practice questions to prepare you well beyond it. (estimate)

28questions here

6free pages

8concepts

Questions 6–10

6application · medium
A service provider has configured penultimate hop popping (PHP) on their MPLS network. A packet traverses an LSP with three LSRs: ingress, transit (penultimate), and egress. What label operation does the penultimate router perform on the packet?
Select an answer first
7foundation · easy
What information is found in an LFIB entry for a transit LSR?
Select an answer first
8foundation · easy
In Penultimate Hop Popping (PHP), which router removes the MPLS label from the packet?
Select an answer first
9application · medium
An MPLS network uses the default TTL propagation behavior. A packet with an IP TTL of 5 enters the MPLS network at the ingress LSR. The LSP has two hops (ingress and egress). What will be the IP TTL when the packet exits the MPLS network?
Select an answer first
10foundation · easy
What does an ingress LSR use to classify an incoming IP packet before pushing the initial MPLS label?
Select an answer first

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End-To-End Packet Flow and Forwarding JN0-364 Practice Questions (Page 2)

Questions 6–10

A service provider has configured penultimate hop popping (PHP) on their MPLS network. A packet traverses an LSP with three LSRs: ingress, transit (penultimate), and egress. What label operation does the penultimate router perform on the packet?

What information is found in an LFIB entry for a transit LSR?

In Penultimate Hop Popping (PHP), which router removes the MPLS label from the packet?

An MPLS network uses the default TTL propagation behavior. A packet with an IP TTL of 5 enters the MPLS network at the ingress LSR. The LSP has two hops (ingress and egress). What will be the IP TTL when the packet exits the MPLS network?

What does an ingress LSR use to classify an incoming IP packet before pushing the initial MPLS label?

Keep studying — Multiprotocol Label Switching (MPLS)