- A
The EPGs are not in the same bridge domain; they must be in the same bridge domain to communicate.
Why wrong: EPGs can be in different bridge domains; contracts allow communication across bridge domains.
- B
The VRF of tenant A and tenant B must have route leaking configured to allow inter-VRF routing.
Why wrong: Route leaking is not needed; contracts handle policy, and VRFs can be separate with shared contracts.
- C
The contract is not marked as 'shared' between tenants; a shared contract must be created and both EPGs must be in the same VRF or use a shared VRF.
ACI requires shared contracts for cross-tenant communication, and the EPGs must be in the same VRF or use a shared VRF.
- D
The filter for HTTPS must also include the source port range 49152-65535 for ephemeral ports.
Why wrong: Source port range is not typically needed for outbound connections in ACI filters.
350-601 Security Practice Question
This 350-601 practice question tests your understanding of security. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
A company runs a multi-tenant data center using Cisco ACI with multiple tenants. Each tenant has its own VRF and EPGs. The security policy requires that tenant A's web servers (EPG web_tenantA) be accessible from tenant B's application servers (EPG app_tenantB) only via HTTPS (TCP 443). The ACI fabric is configured with contracts. The administrator has created a contract with a filter for HTTPS (tcp dstPort 443) and applied it as a provider contract on EPG web_tenantA and as a consumer contract on EPG app_tenantB. However, traffic from tenant B's app servers to tenant A's web servers is being dropped. The administrator has verified that the contracts are applied correctly and the filter is correct. What is the most likely cause of the traffic drop?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
The contract is not marked as 'shared' between tenants; a shared contract must be created and both EPGs must be in the same VRF or use a shared VRF.
In Cisco ACI, contracts are local to a VRF by default. For inter-tenant communication where each tenant has its own VRF, the contract must be explicitly marked as 'shared' and both EPGs must either be in the same VRF or use a shared VRF that allows cross-VRF policy enforcement. Without this, the contract filter is not applied across VRFs, causing traffic to be dropped even though the contract and filter are correctly configured.
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.
- ✗
The EPGs are not in the same bridge domain; they must be in the same bridge domain to communicate.
Why it's wrong here
EPGs can be in different bridge domains; contracts allow communication across bridge domains.
- ✗
The VRF of tenant A and tenant B must have route leaking configured to allow inter-VRF routing.
Why it's wrong here
Route leaking is not needed; contracts handle policy, and VRFs can be separate with shared contracts.
- ✓
The contract is not marked as 'shared' between tenants; a shared contract must be created and both EPGs must be in the same VRF or use a shared VRF.
Why this is correct
ACI requires shared contracts for cross-tenant communication, and the EPGs must be in the same VRF or use a shared VRF.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The filter for HTTPS must also include the source port range 49152-65535 for ephemeral ports.
Why it's wrong here
Source port range is not typically needed for outbound connections in ACI filters.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that contracts work across VRFs by default, when in fact they require explicit sharing configuration, leading candidates to overlook the 'shared contract' requirement.
Detailed technical explanation
How to think about this question
ACI's shared contract mechanism creates a special 'shared' VRF that acts as a transit routing domain, allowing EPGs from different tenants or VRFs to communicate under a common policy. When a contract is marked as shared, ACI automatically installs the necessary routes and applies the filter across the VRFs, leveraging the concept of 'VRF leaking' internally without manual route configuration. This is critical in multi-tenant data centers where isolation is required but selective cross-tenant access must be enforced via contracts.
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 practitioner preparing for the 350-601 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
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 — study guide chapter
Learn the concepts, then practise the questions
- →
Security practice questions
Targeted practice on this topic area only
- →
All 350-601 questions
500 questions across all exam domains
- →
Cisco DCCOR / CCNP Data Center Core 350-601 study guide
Full concept coverage aligned to exam objectives
- →
350-601 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related 350-601 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Network practice questions
Practise 350-601 questions linked to Network.
Compute practice questions
Practise 350-601 questions linked to Compute.
Storage Network practice questions
Practise 350-601 questions linked to Storage Network.
Automation practice questions
Practise 350-601 questions linked to Automation.
Security practice questions
Practise 350-601 questions linked to Security.
350-601 fundamentals practice questions
Practise 350-601 questions linked to 350-601 fundamentals.
350-601 scenario practice questions
Practise 350-601 questions linked to 350-601 scenario.
350-601 troubleshooting practice questions
Practise 350-601 questions linked to 350-601 troubleshooting.
Practice this exam
Start a free 350-601 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this 350-601 question test?
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: The contract is not marked as 'shared' between tenants; a shared contract must be created and both EPGs must be in the same VRF or use a shared VRF. — In Cisco ACI, contracts are local to a VRF by default. For inter-tenant communication where each tenant has its own VRF, the contract must be explicitly marked as 'shared' and both EPGs must either be in the same VRF or use a shared VRF that allows cross-VRF policy enforcement. Without this, the contract filter is not applied across VRFs, causing traffic to be dropped even though the contract and filter are correctly configured.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 11, 2026
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.