200-301 Question 46
Select 3A network engineer is designing a three-tier network architecture for a medium-sized company. The company requires high availability and scalability for its applications, while ensuring that the core layer is optimized for fast switching and routing. Which of the following components and functionalities are typically associated with the core layer in a three-tier architecture?
- A
High-speed forwarding and minimal latency
- B
Direct user access to applications and resources
- C
Aggregation of traffic from the distribution layer
- D
Policy enforcement and access control
- E
Redundancy and fault tolerance for critical links
Show answer and explanation
Correct answers: A, C, E
Explanation
The core layer in a three-tier architecture is primarily responsible for high-speed forwarding, aggregation of traffic from the distribution layer, and ensuring redundancy and fault tolerance. It is optimized for speed and reliability, while tasks like user access and policy enforcement are handled by the access and distribution layers, respectively.
- A. Correct.
High-speed forwarding and minimal latency is a primary function of the core layer to ensure efficient data transfer between networks.
- B. Incorrect.
Direct user access to applications and resources is handled by the access layer, not the core layer.
- C. Correct.
Aggregation of traffic from the distribution layer is a key function of the core layer to centralize and route traffic efficiently.
- D. Incorrect.
Policy enforcement and access control are typically managed at the distribution layer, not the core layer.
- E. Correct.
Redundancy and fault tolerance for critical links are critical features of the core layer to maintain high availability and reliability.