Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) — Question 501

What are two best practices when designing a campus Layer 3 infrastructure? (Choose two.)

Answer options

• A. Configure passive-interface on nontransit links.
• B. Implement security features at the core.
• C. Summarize routes from the aggregation layer toward the core layer.
• D. Tune Cisco Express Forwarding load balancing hash for ECMP routing.
• E. Summarize from the access layer toward the aggregation layer.

Correct answer: C, D

Explanation

Summarizing routes from the aggregation layer toward the core layer improves routing efficiency and reduces routing table size, making option C correct. Tuning the load balancing hash for ECMP routing helps optimize traffic distribution, which is why option D is also correct. Options A and E do not specifically address the core design practices for a Layer 3 infrastructure, while option B, though important, does not fit the best practices for Layer 3 design specifically.