Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) — Question 412

What is a characteristic of Layer 3 MPLS VPNs?

Answer options

• A. Traffic engineering capabilities provide QoS and SLAs.
• B. Traffic engineering supports multiple IGP instances.
• C. LSP signaling requires the use of unnumbered IP links for traffic engineering.
• D. Authentication is performed by using digital certificates or preshared keys.

Correct answer: A

Explanation

The correct answer is A because Layer 3 MPLS VPNs utilize traffic engineering to ensure Quality of Service (QoS) and meet Service Level Agreements (SLAs). Options B, C, and D do not accurately describe characteristics specific to Layer 3 MPLS VPNs, as they pertain to other networking concepts or methods.