350-601 Network Practice Question
What does the oversubscription ratio in a spine-leaf fabric represent?
⚠ Common exam trap
Cisco often tests the distinction between oversubscription ratio (server-to-uplink on a leaf) and overall fabric capacity, leading candidates to mistakenly choose the total fabric bandwidth ratio (Option C) instead of the leaf-level server-to-uplink ratio.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Ratio of server bandwidth to leaf uplink bandwidth
In a spine-leaf fabric, the oversubscription ratio specifically compares the total bandwidth available from the servers (leaf southbound ports) to the total uplink bandwidth from the leaf to the spine (leaf northbound ports). This ratio determines how much potential congestion exists when multiple servers contend for uplink capacity, directly impacting performance in a non-blocking or oversubscribed design.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Ratio of spine to leaf bandwidth
Why it's wrong here
It is leaf downlink to uplink ratio.
- ✓
Ratio of server bandwidth to leaf uplink bandwidth
Why this is correct
Commonly 3:1 or 4:1.
- ✗
Ratio of total fabric bandwidth to total server bandwidth
Why it's wrong here
Incorrect definition.
- ✗
Number of spine switches per leaf
Why it's wrong here
That is not a ratio.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-601 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-601 exam.