PCNE Implementing VPC Instances Practice Question
An engineer needs to allow HTTP health checks from the Google Cloud health checker IP ranges to a set of instances. Which two methods can be used to target the firewall rule correctly? (Choose two.)
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
✓
Use target service accounts on the instances.
Firewall rules can target instances using tags or service accounts. The health checker IP ranges are well-known and can be used as source.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use source service accounts on the health checkers.
Why it's wrong here
Health checkers are Google infrastructure, not associated with a service account.
- ✗
Use source tags on the health checkers.
Why it's wrong here
Health checkers do not have tags; they are defined by IP ranges.
- ✓
Use target service accounts on the instances.
Why this is correct
Service accounts are also a valid target.
- ✓
Use target tags on the instances.
Why this is correct
Tags are a valid way to target instances.
- ✗
Use instance names in the firewall rule.
Why it's wrong here
Firewall rules do not support instance names as targets.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCNE 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 PCNE exam.