What is the correct oversubscription ratio between aggregation and core layer?

The correct answer is B. 1 to 4. In Cisco's hierarchical network design model, the standard oversubscription ratio between the aggregation (distribution) layer and the core layer is 4:1. This means for every 4 units of aggregation-layer bandwidth, there is 1 unit of core-layer bandwidth. This ratio balances…

Advanced Enterprise Campus Networks

Question

Options

A1 to 2
B1 to 4
C1 to 8
D1 to 10

How the community answered

(20 responses)

A
5% (1)
B
90% (18)
D
5% (1)

Explanation

In Cisco's hierarchical network design model, the standard oversubscription ratio between the aggregation (distribution) layer and the core layer is 4:1. This means for every 4 units of aggregation-layer bandwidth, there is 1 unit of core-layer bandwidth. This ratio balances cost efficiency with performance. The core layer is designed for high-speed forwarding with minimal latency, and the 4:1 ratio is the Cisco-recommended guideline that prevents the core from becoming a bottleneck while avoiding unnecessary over-provisioning.

Topics

#oversubscription ratio#aggregation layer#core layer#campus design

Community Discussion

No community discussion yet for this question.

Full 300-320 Practice