350-401 Question 12
Single answerA large enterprise is experiencing scalability issues with its current network design. The network team has been tasked with redesigning the architecture to improve scalability, fault isolation, and hierarchical management. Which network design model would BEST address these requirements?
- A
2-tier collapsed core architecture
- B
3-tier hierarchical architecture
- C
Spine-leaf fabric architecture
- D
Flat network design
Show answer and explanation
Correct answer: B
Explanation
The 3-tier hierarchical architecture is the most suitable design for large enterprises requiring scalability, fault isolation, and hierarchical management. It achieves these goals by separating the network into core, distribution, and access layers, enabling efficient traffic management and improved fault tolerance.
- A. Incorrect.
The 2-tier collapsed core architecture combines the core and distribution layers into a single layer. While it is simpler and cost-effective for smaller networks, it does not provide the same level of scalability, fault isolation, and hierarchical management as a 3-tier design.
- B. Correct.
The 3-tier hierarchical architecture separates the core, distribution, and access layers, providing better scalability, fault isolation, and hierarchical management. This makes it the best choice for large enterprise networks.
- C. Incorrect.
The spine-leaf fabric architecture is commonly used in data center environments for high-speed, low-latency communication. While it is scalable, it is less suited for traditional enterprise-wide network designs outside of data centers.
- D. Incorrect.
Flat network design connects devices on a single broadcast domain, lacking scalability and fault isolation. It is unsuitable for large enterprises.