CCNA: Cisco Certified Network Associate — Question 75

What are two descriptions of three-tier network topologies? (Choose two.)

Answer options

• A. The distribution layer runs Layer 2 and Layer 3 technologies
• B. The network core is designed to maintain continuous connectivity when devices fail
• C. The access layer manages routing between devices in different domains
• D. The core layer maintains wired connections for each host
• E. The core and distribution layers perform the same functions

Correct answer: A, B

Explanation

Option A is correct because the distribution layer does indeed utilize both Layer 2 and Layer 3 technologies to manage traffic. Option B is also correct as the core layer is designed for reliability, ensuring that connectivity remains uninterrupted even if devices fail. The other options are incorrect because the access layer does not manage inter-domain routing (C), the core layer does not specifically maintain connections for individual hosts (D), and the core and distribution layers have distinct roles and do not perform the same functions (E).