200-901 Application Deployment and Security Practice Question
This 200-901 practice question tests your understanding of application deployment and security. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 Python script uses the Cisco Meraki API to list networks in an organization. The API returns HTTP 403 Forbidden. What is the most likely cause?
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 the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The API key is invalid or missing.
HTTP 403 Forbidden indicates the server understood the request but refuses to authorize it. In the context of the Meraki API, this almost always means the API key (X-Cisco-Meraki-API-Key header) is invalid, expired, or missing from the request. Without a valid API key, the server cannot authenticate the client and returns 403.
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 request was sent over HTTP instead of HTTPS.
Why it's wrong here
Meraki API enforces HTTPS; HTTP requests may be redirected or fail with a different error.
✗
The network ID specified is incorrect.
Why it's wrong here
An incorrect network ID would cause a 404 or a bad request, not 403.
✓
The API key is invalid or missing.
Why this is correct
The Meraki API returns 403 when the API key is invalid or not provided.
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 organization ID was omitted from the request.
Why it's wrong here
Missing organization ID typically results in a 400 Bad Request error.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between 401 Unauthorized (missing or invalid authentication credentials) and 403 Forbidden (authenticated but not authorized); the trap here is that candidates may confuse 403 with a missing parameter (like organization ID) or a wrong resource ID, but 403 specifically indicates the request was understood but authorization failed.
Detailed technical explanation
How to think about this question
The Meraki API uses API keys passed in the HTTP header 'X-Cisco-Meraki-API-Key' for authentication. A 403 Forbidden can also occur if the API key is valid but lacks sufficient permissions (e.g., read-only key trying to write), though the most common cause is an invalid or missing key. Under the hood, the Meraki API validates the key against a hash stored in its database; if the key is not found or is revoked, the server returns 403 without revealing whether the key exists (security best practice).
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 200-901 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.
Application Deployment and Security — This question tests Application Deployment and Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The API key is invalid or missing. — HTTP 403 Forbidden indicates the server understood the request but refuses to authorize it. In the context of the Meraki API, this almost always means the API key (X-Cisco-Meraki-API-Key header) is invalid, expired, or missing from the request. Without a valid API key, the server cannot authenticate the client and returns 403.
What should I do if I get this 200-901 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.
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Question Discussion
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