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Design for security and compliance →mediumMultiple ChoiceObjective-mapped

Google PCA Design for security and compliance Practice Question

This PCA practice question tests your understanding of design for security and compliance. 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.

Exhibit

Refer to the exhibit.

```
gcloud compute firewall-rules describe my-rule
---
allowed:
- IPProtocol: tcp
  ports:
  - 80
  - 443
direction: INGRESS
sourceRanges:
- 10.0.0.0/8
- 192.168.0.0/16
targetTags:
- web-server
```

Which traffic will this rule allow?

Exhibit

Refer to the exhibit.

```
gcloud compute firewall-rules describe my-rule
---
allowed:
- IPProtocol: tcp
  ports:
  - 80
  - 443
direction: INGRESS
sourceRanges:
- 10.0.0.0/8
- 192.168.0.0/16
targetTags:
- web-server
```

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

✓

Inbound TCP traffic on ports 80 and 443 from IP ranges to instances with tag 'web-server'

The rule in question is an inbound firewall rule that allows TCP traffic on ports 80 and 443 from specific IP ranges to instances with the tag 'web-server'. Therefore, option D correctly describes the traffic allowed by this rule.

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.

  • ✗

    Outbound TCP traffic on ports 80 and 443 from instances with tag 'web-server' to IP ranges

    Why it's wrong here

    Direction is INGRESS, not EGRESS.

  • ✗

    Inbound TCP traffic on ports 80 and 443 from IP ranges to all instances

    Why it's wrong here

    Rule has target tag 'web-server', so only applies to instances with that tag.

  • ✗

    Inbound TCP traffic on ports 80 and 443 from any IP address to instances with tag 'web-server'

    Why it's wrong here

    Source is restricted to 10.0.0.0/8 and 192.168.0.0/16.

  • ✓

    Inbound TCP traffic on ports 80 and 443 from IP ranges to instances with tag 'web-server'

    Why this is correct

    Matches the rule definition exactly.

    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 distinction between inbound and outbound rules and the scope of source/destination, where candidates mistakenly choose a rule that allows traffic from any IP or to all instances instead of the specific tagged group.

Detailed technical explanation

How to think about this question

In AWS, security group rules are stateful and evaluated based on source (for inbound) or destination (for outbound) IP ranges, protocols, and ports. The tag 'web-server' is used in resource-based policies or network ACLs to filter traffic to specific instances, but security groups themselves do not use tags directly; instead, they reference instance IDs or security group IDs. This question likely tests understanding of how network ACLs or security group rules are scoped to specific resources via tags in a VPC design.

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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.

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.

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FAQ

Questions learners often ask

What does this PCA question test?

Design for security and compliance — This question tests Design for security and compliance — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Inbound TCP traffic on ports 80 and 443 from IP ranges to instances with tag 'web-server' — The rule in question is an inbound firewall rule that allows TCP traffic on ports 80 and 443 from specific IP ranges to instances with the tag 'web-server'. Therefore, option D correctly describes the traffic allowed by this rule.

What should I do if I get this PCA 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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Last reviewed: Jul 4, 2026

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This PCA practice question is part of Courseiva's free Google Cloud 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 PCA exam.