- A
Cloud Audit Logs
Why wrong: Records admin activity, not network traffic.
- B
Packet Mirroring (Network Intelligence Center)
Provides deep packet inspection.
- C
VPC Flow Logs
Captures network traffic metadata.
- D
Cloud Monitoring
Why wrong: Provides metrics, not traffic details.
- E
Cloud Logging
Why wrong: Stores logs, but not the generation service.
Question 863 of 1,000
Google PCA Packet Mirroring Practice Question
This PCA practice question tests your understanding of manage implementation of cloud architecture. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. A key principle to apply: packet Mirroring. 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.
An organization wants to monitor network traffic between VMs in a VPC for troubleshooting. Which TWO services can provide this?
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
✓
Packet Mirroring (Network Intelligence Center)
Packet Mirroring (Network Intelligence Center) clones actual packet contents (headers and payload) from VM instances for deep packet inspection, enabling detailed troubleshooting. VPC Flow Logs capture IP traffic metadata (source/destination IP, ports, protocol, packet count) flowing to and from VMs, providing visibility into network traffic patterns and bottlenecks. Both services are useful for monitoring network traffic between VMs in a VPC, with Packet Mirroring offering full packet capture and VPC Flow Logs providing metadata-level logging.
Key principle: Packet Mirroring
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Cloud Audit Logs
Why it's wrong here
Records admin activity, not network traffic.
- ✓
Packet Mirroring (Network Intelligence Center)
Why this is correct
Provides deep packet inspection.
Related concept
Packet Mirroring
- ✓
VPC Flow Logs
Why this is correct
Captures network traffic metadata.
Related concept
Packet Mirroring
- ✗
Cloud Monitoring
Why it's wrong here
Provides metrics, not traffic details.
- ✗
Cloud Logging
Why it's wrong here
Stores logs, but not the generation service.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the distinction between services that capture raw packet data (Packet Mirroring) versus those that log only metadata or metrics (VPC Flow Logs). Candidates may incorrectly think only one is correct, but both can be used for troubleshooting network traffic between VMs, depending on the depth of information needed.
Detailed technical explanation
How to think about this question
Packet Mirroring uses a VPC mirror source (e.g., a VM NIC) and a mirror destination (e.g., an internal load balancer or another VM) to copy all ingress/egress packets at the hypervisor level, ensuring no performance impact on the source VM. It supports filtering by IP ranges, protocols, or port numbers to reduce noise, and the mirrored traffic is encapsulated with a VXLAN header (UDP port 4789) for transport. In a real-world scenario, you could use it to capture a TLS handshake between two VMs to debug a certificate mismatch or retransmission issue.
KKey Concepts to Remember
- Packet Mirroring
- VPC Flow Logs
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
Packet Mirroring
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.
What to study next
Got this wrong? Here's your next step.
Review packet Mirroring, then practise related PCA questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this PCA question test?
Manage implementation of cloud architecture — This question tests Manage implementation of cloud architecture — Packet Mirroring.
What is the correct answer to this question?
The correct answer is: Packet Mirroring (Network Intelligence Center) — Packet Mirroring (Network Intelligence Center) clones actual packet contents (headers and payload) from VM instances for deep packet inspection, enabling detailed troubleshooting. VPC Flow Logs capture IP traffic metadata (source/destination IP, ports, protocol, packet count) flowing to and from VMs, providing visibility into network traffic patterns and bottlenecks. Both services are useful for monitoring network traffic between VMs in a VPC, with Packet Mirroring offering full packet capture and VPC Flow Logs providing metadata-level logging.
What should I do if I get this PCA question wrong?
Review packet Mirroring, then practise related PCA questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Packet Mirroring
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Last reviewed: Jun 30, 2026
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.
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