CCNA: Cisco Certified Network Associate — Question 201

Which two functions are performed by the core layer in a three-tier architecture? (Choose two.)

Answer options

• A. Provide uninterrupted forwarding service
• B. Inspect packets for malicious activity
• C. Ensure timely data transfer between layers
• D. Provide direct connectivity for end user devices
• E. Police traffic that is sent to the edge of the network

Correct answer: A, C

Explanation

The core layer's main functions are to provide uninterrupted forwarding service and ensure timely data transfer between layers, which are critical for efficient network performance. Options B, D, and E relate to other layers in the architecture, such as security and access, but do not accurately describe the core layer's responsibilities.