CCDE: Cisco Certified Design Expert (Practical) — Question 58

The Layer 3 control plane is the intelligence over the network that steers traffic toward its intended destination. Which two techniques can be used in service provider-style networks to offer a more dynamic, flexible, controlled, and secure control plane design? (Choose two.)

Answer options

• A. QoS policy propagation with BGP
• B. remote black-holing trigger
• C. prefix lists
• D. access control lists
• E. firewalls

Correct answer: B, C

Explanation

The correct answers, B and C, pertain to methods that can improve traffic management and security. Remote black-holing trigger (B) allows for the immediate response to threats by redirecting traffic, while prefix lists (C) help in controlling which routes are advertised or accepted. Options A, D, and E, while useful in different contexts, do not specifically address the dynamic and flexible nature of the control plane as effectively as B and C.