In MPLS, what is the primary function of the label distribution protocol (e.g., LDP)?

To encapsulate MPLS packets in IP tunnels

To exchange routing information between PE routers

To assign and distribute labels for building label-switched paths

How does MP-BGP exchange VPNv4 routes between PE routers?

By using LDP to exchange VPN routes

By sending the entire VRF table to all PEs

By using OSPF as the transport protocol

By carrying VPNv4 addresses (RD + IPv4 prefix) and VPN labels in BGP updates

In an MPLS L3VPN data plane, what is the purpose of the inner label?

To route the packet across the MPLS backbone

To identify the VPN and the egress PE's VRF

To carry the customer's MAC address

When a PE router receives a labeled packet from the MPLS backbone, what does it do with the outer label?

It swaps the outer label with a new label and forwards it to the CE

It performs a routing lookup on the outer label

It forwards the packet with both labels intact to the CE

It pops the outer label and then uses the inner label to determine the VRF and forward the IP packet to the CE

CCIE Enterprise Infrastructure

Domain 3Objective 2

MPLS CCIE-ENTERPRISE-INFRASTRUCTURE Practice Questions (Page 1)

Part of the Transport Technologies and Solutions domain, which accounts for 15% of the CCIE-ENTERPRISE-INFRASTRUCTURE exam. Cisco does not publish an official question count, but from its 120-minute exam (~50–80 total, ~8–12 in this domain), expect 3–4 from this objective — we provide 14 practice questions to prepare you well beyond it. (estimate)

14questions here

3free pages

7concepts

15%of the exam

Questions 1–5

1foundation · easy
In MPLS, what is the primary function of the label distribution protocol (e.g., LDP)?
Select an answer first
2foundation · easy
How does MP-BGP exchange VPNv4 routes between PE routers?
Select an answer first
3foundation · easy
In an MPLS L3VPN data plane, what is the purpose of the inner label?
Select an answer first
4foundation · easy
When a PE router receives a labeled packet from the MPLS backbone, what does it do with the outer label?
Select an answer first
5foundation · easy
Which command is used to create a VRF on a Cisco IOS XE device?
Select an answer first

Finished these 5 questions?

Review the revealed explanations, or continue through the curriculum.

Next 5 questions →Back to CCIE-ENTERPRISE-INFRASTRUCTURE

Free Basic Practice is a study aid with revealable answers — not a scored exam. Examers.io is independent and not affiliated with or endorsed by Cisco. “CCIE-ENTERPRISE-INFRASTRUCTURE” is a trademark of its owner, used for identification only.