Cloud Digital Leader Trust and security with Google Cloud Practice Question
This GCDL practice question tests your understanding of trust and security with google cloud. 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 multinational corporation uses Cloud Identity-Aware Proxy (IAP) to secure access to applications. They notice that some users outside the corporate network can still reach the applications. What is the most likely misconfiguration?
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
✓
IAP is set to 'allUsers' instead of 'allAuthenticatedUsers'.
Option A is correct because setting IAP to 'allUsers' allows unauthenticated access from any user on the internet, bypassing IAP's authentication and authorization checks. IAP should be configured with 'allAuthenticatedUsers' or a more specific set of principals to enforce identity verification before granting access to the application.
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.
✓
IAP is set to 'allUsers' instead of 'allAuthenticatedUsers'.
Why this is correct
allUsers includes unauthenticated users, allowing anyone to access the application.
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 firewall rules allow ingress from 0.0.0.0/0.
Why it's wrong here
Firewall rules are irrelevant if IAP is correctly configured, as IAP checks before traffic reaches the backend.
✗
IAP is not enabled on the backend service.
Why it's wrong here
If IAP were not enabled, all traffic would be allowed, but the issue is that some users outside can access, not all.
✗
The OAuth 2.0 client ID is misconfigured.
Why it's wrong here
A misconfigured client ID would cause authentication errors, not allow unauthorized access.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the distinction between 'allUsers' (anyone, including unauthenticated users) and 'allAuthenticatedUsers' (any authenticated Google identity), which is a common source of confusion for candidates who assume IAP always requires authentication regardless of the IAM setting.
Detailed technical explanation
How to think about this question
IAP uses signed headers (X-Goog-IAP-JWT-Assertion) injected by the Google Cloud load balancer after successful authentication. When IAP is set to 'allUsers', the load balancer still injects these headers, but the backend service does not enforce authentication, effectively treating all requests as authenticated. In a real-world scenario, this misconfiguration often occurs during initial setup when developers mistakenly use 'allUsers' for testing and forget to restrict access before production deployment.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this GCDL question in full detail.
Trust and security with Google Cloud — This question tests Trust and security with Google Cloud — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: IAP is set to 'allUsers' instead of 'allAuthenticatedUsers'. — Option A is correct because setting IAP to 'allUsers' allows unauthenticated access from any user on the internet, bypassing IAP's authentication and authorization checks. IAP should be configured with 'allAuthenticatedUsers' or a more specific set of principals to enforce identity verification before granting access to the application.
What should I do if I get this GCDL 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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