Objective 5.2
PCNEMaintaining and troubleshooting connectivity issues
Objective 5.2 sits in Managing, monitoring, and troubleshooting network operations, which carries 14% of the Cloud Network Engineer exam. The questions below are original, written from the official objective title above, and each explanation cites the Google Cloud page it rests on.
Objective title verbatim from the official objectives. Google Cloud exam page ↗
A worked example
Shown solved, with the whole explanation open: this is what every question here carries.
An engineer plans to run the analysis appliance on the very interface that is being mirrored, to save on instances. What does that arrangement produce?
Correct.
Concept
A tap and its consumer must sit on different interfaces, since feeding a copy back into the point that generates copies never terminates.
Why B
Traffic cannot be mirrored and collected on the same network interface of a VM instance, as doing so would cause a mirroring loop.
Source
Packet Mirroring, checked August 2026You cannot mirror and collect traffic on the same network interface of a VM instance because doing this would cause a mirroring loop.
Now you: objective 5.2 questions
No account needed. The explanation opens when you answer.
Sample question 1 of 3
A team points ordinary application traffic at the same internal load balancer that serves as a packet mirroring collector destination. What happens to that traffic?
Sample question 2 of 3
A team enables VPC Flow Logs on the subnet holding the collector instances and expects a record of every mirrored packet. What actually appears in the logs?
Sample question 3 of 3
Two mirroring policies apply to one instance, with the filters 10.240.1.0/24:ALL and 10.240.0.0/16:TCP. A TCP packet leaves for 10.240.1.4. Which policy handles it?
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Read the sources
These are the official pages the questions above cite. Reading them is studying the objective from the primary source, which is what the explanations point you toward anyway.