A network engineer is examining an MPLS packet with a two-label stack. The outer label has the S bit set to 0, and the inner label has the S bit set to 1. What does this configuration indicate?

Both labels are at the bottom of the stack.

The inner label is the bottom of the stack, and the outer label is the top.

The packet is malformed because the S bit must be set to 1 on the outer label.

The outer label is the bottom of the stack, and the inner label is the top.

A service provider is deploying MPLS L3VPN. The PE router receives an IP packet from a customer and must forward it across the provider core. Which label stack will the PE push onto the packet?

A single label that identifies the customer VPN, with the S bit set to 1.

An outer transport label and an inner VPN label, with the S bit set on the inner label.

Two identical labels, both with the S bit set to 0.

An outer VPN label and an inner transport label, with the S bit set on the outer label.

A network engineer is analyzing an MPLS packet capture. The shim header shows the following fields: Label = 100, EXP = 5, S = 1, TTL = 64. Which statement about this packet is true?

The TTL of 64 is invalid because MPLS TTL must be 255.

There is at least one more label below this one in the stack.

This is the only label in the stack, and the payload is an IP packet.

The EXP value of 5 indicates that this is a reserved label.

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

Domain 7Objective 2

MPLS Packet Header JN0-364 Practice Questions (Page 4)

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 20 practice questions to prepare you well beyond it. (estimate)

20questions here

4free pages

6concepts

Questions 16–20

16application · medium
A network engineer is examining an MPLS packet with a two-label stack. The outer label has the S bit set to 0, and the inner label has the S bit set to 1. What does this configuration indicate?
Select an answer first
17application · medium
A network engineer is configuring MPLS on a Juniper router and needs to assign a label value for a new FEC. Which label value can be used for this purpose?
Select an answer first
18application · medium
A service provider is deploying MPLS L3VPN. The PE router receives an IP packet from a customer and must forward it across the provider core. Which label stack will the PE push onto the packet?
Select an answer first
19foundation · easy
How many distinct class-of-service values can be represented by the 3-bit EXP field?
Select an answer first
20application · medium
A network engineer is analyzing an MPLS packet capture. The shim header shows the following fields: Label = 100, EXP = 5, S = 1, TTL = 64. Which statement about this packet is true?
Select an answer first

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MPLS Packet Header JN0-364 Practice Questions (Page 4)

Questions 16–20

A network engineer is examining an MPLS packet with a two-label stack. The outer label has the S bit set to 0, and the inner label has the S bit set to 1. What does this configuration indicate?

A network engineer is configuring MPLS on a Juniper router and needs to assign a label value for a new FEC. Which label value can be used for this purpose?

A service provider is deploying MPLS L3VPN. The PE router receives an IP packet from a customer and must forward it across the provider core. Which label stack will the PE push onto the packet?

How many distinct class-of-service values can be represented by the 3-bit EXP field?

A network engineer is analyzing an MPLS packet capture. The shim header shows the following fields: Label = 100, EXP = 5, S = 1, TTL = 64. Which statement about this packet is true?

Keep studying — Multiprotocol Label Switching (MPLS)