The answer is that Cloud Armor will allow the request because the rule with priority 200 matches and explicitly allows it. This is correct because Cloud Armor evaluates rules strictly by priority order, where the lowest numerical priority number has the highest precedence. When a request with User-Agent 'GoodBot' and path '/admin' arrives, the engine first checks priority 200, which matches and issues an allow action; once a matching allow rule is found, evaluation stops immediately, and no lower-priority rules—including any deny rules—are ever considered. On the Google Professional Cloud Network Engineer exam, this scenario tests your understanding of the Cloud Armor rule priority evaluation order and the critical distinction that allow rules can short-circuit deny rules when they appear earlier in the sequence. A common trap is assuming that a deny rule at a higher priority number will override an allow rule, but the evaluation order always respects the lowest-numbered priority first. Remember the mnemonic: “Lowest number wins the floor—allow stops the door.”
PCNE Implementing network security Practice Question
This PCNE practice question tests your understanding of implementing network 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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Allow the request because the rule with priority 200 matches and allows it.
Option D is correct because Cloud Armor evaluates rules in order of priority (lowest number = highest priority). The rule with priority 200 matches the request (User-Agent 'GoodBot' and path '/admin') and explicitly allows it. Once a matching allow rule is found, evaluation stops, and the request is allowed, overriding any lower-priority rules.
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.
✗
Deny the request because the rule with priority 300 has a higher priority number but matches path.
Why it's wrong here
Higher priority number means lower precedence; already allowed by earlier rule.
✗
Allow the request because of the default rule at priority 1000.
Why it's wrong here
Default rule is not reached because an explicit allow matched earlier.
✗
Deny the request because both rules match and deny takes precedence.
Why it's wrong here
Only one allow rule matches; priorities ensure first match decides.
✓
Allow the request because the rule with priority 200 matches and allows it.
Why this is correct
Priority 200 is evaluated before 300 and matches.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that deny rules always override allow rules, but in Cloud Armor, the first matching rule (by priority) determines the action, regardless of whether it is allow or deny.
Detailed technical explanation
How to think about this question
Cloud Armor security policies use a priority-based rule evaluation model where lower numeric priority values are evaluated first. When a rule matches, its action (allow or deny) is applied immediately, and no further rules are processed. This is similar to firewallACL evaluation but with explicit priority ordering. In real-world scenarios, misordering priorities can lead to unintended allow or deny behavior, especially when combining bot management rules with path-based restrictions.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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.
Implementing network security — This question tests Implementing network security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Allow the request because the rule with priority 200 matches and allows it. — Option D is correct because Cloud Armor evaluates rules in order of priority (lowest number = highest priority). The rule with priority 200 matches the request (User-Agent 'GoodBot' and path '/admin') and explicitly allows it. Once a matching allow rule is found, evaluation stops, and the request is allowed, overriding any lower-priority rules.
What should I do if I get this PCNE 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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