- A
Enable Cloud NAT logging to capture outbound traffic.
Why wrong: Cloud NAT logging logs NAT connections, not all outbound traffic; VPC Flow Logs are more comprehensive.
- B
Enable Packet Mirroring to duplicate all outbound packets.
Why wrong: Packet Mirroring is for deep packet inspection, not for logging and analysis of flow data; it also incurs additional cost.
- C
Enable VPC Flow Logs on the subnets where the instances are located.
VPC Flow Logs capture IP traffic, including outbound flows.
- D
Create a log sink to export VPC Flow Logs to BigQuery.
Exporting to BigQuery enables analysis of large volumes of flow log data.
- E
Use BigQuery to query the exported flow logs for anomalous patterns.
BigQuery allows running analytics on the flow logs to detect anomalies.
PCSE Practice Question: Managing Operations in a Cloud Solution Environment
This PCSE practice question tests your understanding of managing operations in a cloud solution environment. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 security team needs to detect anomalous outbound traffic from Compute Engine instances. They want to enable logging and analyze the data. Which three steps should they take? (Choose three.)
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
Enable VPC Flow Logs on the subnets where the instances are located.
To detect anomalous outbound traffic, you need to enable VPC Flow Logs (which log outbound traffic), export them to BigQuery for analysis (using a log sink), and query the data. Cloud NAT is for outbound connectivity with NAT, but not logging. Packet Mirroring copies traffic but is not necessary for flow logs. Firewall Rules logging logs firewall hits, not all outbound traffic.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable Cloud NAT logging to capture outbound traffic.
Why it's wrong here
Cloud NAT logging logs NAT connections, not all outbound traffic; VPC Flow Logs are more comprehensive.
- ✗
Enable Packet Mirroring to duplicate all outbound packets.
Why it's wrong here
Packet Mirroring is for deep packet inspection, not for logging and analysis of flow data; it also incurs additional cost.
- ✓
Enable VPC Flow Logs on the subnets where the instances are located.
Why this is correct
VPC Flow Logs capture IP traffic, including outbound flows.
Related concept
CIDR notation defines the prefix length.
- ✓
Create a log sink to export VPC Flow Logs to BigQuery.
Why this is correct
Exporting to BigQuery enables analysis of large volumes of flow log data.
Related concept
CIDR notation defines the prefix length.
- ✓
Use BigQuery to query the exported flow logs for anomalous patterns.
Why this is correct
BigQuery allows running analytics on the flow logs to detect anomalies.
Related concept
CIDR notation defines the prefix length.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
- CIDR notation defines the prefix length.
- Block size helps identify subnet boundaries.
- Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
- The required host count determines the smallest suitable subnet.
TExam Day Tips
- Write the block size before choosing the subnet.
- Check whether the question asks for hosts, subnets or a specific address range.
- Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Visual reference
What to study next
Got this wrong? Here's your next step.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related PCSE subnetting questions on CIDR, address ranges, and subnet selection.
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Managing Operations in a Cloud Solution Environment — study guide chapter
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FAQ
Questions learners often ask
What does this PCSE question test?
Managing Operations in a Cloud Solution Environment — This question tests Managing Operations in a Cloud Solution Environment — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Enable VPC Flow Logs on the subnets where the instances are located. — To detect anomalous outbound traffic, you need to enable VPC Flow Logs (which log outbound traffic), export them to BigQuery for analysis (using a log sink), and query the data. Cloud NAT is for outbound connectivity with NAT, but not logging. Packet Mirroring copies traffic but is not necessary for flow logs. Firewall Rules logging logs firewall hits, not all outbound traffic.
What should I do if I get this PCSE question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related PCSE subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
About these practice questions
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Last reviewed: Jul 4, 2026
This PCSE 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 PCSE exam.
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