In MPLS forwarding, what does an LSR primarily use to make forwarding decisions?

The destination IP address in the IP header

The top label in the MPLS label stack

The source IP address in the IP header

A network administrator is configuring MPLS on a router that will be the penultimate hop before the egress LER. The administrator wants the router to remove the MPLS label before forwarding the packet to the egress router. Which label operation should the administrator configure?

No operation (continue forwarding with the same label)

Pop (explicit null or implicit null)

An engineer is explaining MPLS to a colleague. The engineer says that packets belonging to the same forwarding equivalence class (FEC) are treated identically. Which statement best describes the relationship between a FEC and an LSP?

A single LSP can carry traffic for multiple FECs, and each FEC is mapped to a label at the ingress.

Each FEC must have its own dedicated LSP, and no two FECs can share an LSP.

A FEC is a physical path through the network, and an LSP is a logical grouping of packets.

FEC and LSP are interchangeable terms for the same concept.

While troubleshooting an MPLS issue, a network engineer captures a packet on the wire. The engineer needs to identify the MPLS label value, the traffic class, and whether this is the bottom of the label stack. Which fields of the MPLS shim header should the engineer examine?

Label, EXP, S, and Hop Limit fields

Label, Priority, S, and TTL fields

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

Domain 7Objective 1

MPLS Terminology 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 19 practice questions to prepare you well beyond it. (estimate)

19questions here

4free pages

4concepts

Questions 6–10

6foundation · easy
Which field in an MPLS label is used to indicate whether more labels follow in the label stack?
Select an answer first
7foundation · easy
In MPLS forwarding, what does an LSR primarily use to make forwarding decisions?
Select an answer first
8application · easy
A network administrator is configuring MPLS on a router that will be the penultimate hop before the egress LER. The administrator wants the router to remove the MPLS label before forwarding the packet to the egress router. Which label operation should the administrator configure?
Select an answer first
9application · medium
An engineer is explaining MPLS to a colleague. The engineer says that packets belonging to the same forwarding equivalence class (FEC) are treated identically. Which statement best describes the relationship between a FEC and an LSP?
Select an answer first
10application · easy
While troubleshooting an MPLS issue, a network engineer captures a packet on the wire. The engineer needs to identify the MPLS label value, the traffic class, and whether this is the bottom of the label stack. Which fields of the MPLS shim header should the engineer examine?
Select an answer first

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