This 350-601 practice question tests your understanding of security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An organization is deploying Cisco ACI in a brownfield data center. They have existing VLANs that need to be mapped to ACI EPGs. The network team notices that some VLANs are used across multiple tenants. How should the engineer design the VLAN pool to support overlapping VLANs?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create separate VLAN pools per tenant, each containing the required VLANs.
Option B is correct because in Cisco ACI, VLAN pools are scoped to a physical domain, and overlapping VLANs across tenants require separate VLAN pools per tenant. Each tenant's EPG is statically bound to its own VLAN pool, ensuring isolation and preventing VLAN conflicts. This design aligns with ACI's multi-tenant architecture where VLAN IDs must be unique within a domain but can be reused across different domains.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Configure the VLANs as part of the EPG static binding without a pool.
Create a global VLAN pool with all VLANs and assign it to all tenants.
Why it's wrong here
Overlapping VLANs would conflict.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that a single VLAN pool can be shared across tenants with overlapping VLANs, but in reality, VLAN pools are domain-scoped and overlapping IDs require separate pools to maintain isolation.
Detailed technical explanation
How to think about this question
Under the hood, Cisco ACI uses VLAN pools as a resource allocation mechanism tied to physical domains (e.g., VMM, physical, or L2Out domains). When overlapping VLANs are needed across tenants, separate VLAN pools must be created per tenant, each associated with a distinct physical domain or a separate encapsulation block. In a brownfield deployment, this allows seamless migration of existing VLANs without renumbering, as each tenant's EPG maps to its own isolated VLAN pool.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A help-desk technician troubleshoots why a newly connected PC cannot reach shared printers on the same floor. The cable is good, the switch port is active, but the PC is in VLAN 20 and the printers are in VLAN 10. The uplink trunk only allows VLAN 10. A trunk being up does not mean every VLAN crosses it.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Security — This question tests Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create separate VLAN pools per tenant, each containing the required VLANs. — Option B is correct because in Cisco ACI, VLAN pools are scoped to a physical domain, and overlapping VLANs across tenants require separate VLAN pools per tenant. Each tenant's EPG is statically bound to its own VLAN pool, ensuring isolation and preventing VLAN conflicts. This design aligns with ACI's multi-tenant architecture where VLAN IDs must be unique within a domain but can be reused across different domains.
What should I do if I get this 350-601 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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