PCNE Implementing VPC Instances Practice Question
An organization wants to enforce that only instances with specific service accounts can be accessed via SSH (TCP 22) from the internet. Which two attributes should be used in the firewall rule to achieve this? (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
✓
--source-ranges 0.0.0.0/0
To target instances based on service account, use --target-service-accounts. To specify the source from internet, use --source-ranges with 0.0.0.0/0.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
--source-service-accounts
Why it's wrong here
Source service accounts are for ingress rules based on the sender's service account, not the target.
- ✓
--source-ranges 0.0.0.0/0
Why this is correct
Correct. Allows traffic from any source (internet).
- ✗
--target-tags
Why it's wrong here
Tags are not service accounts.
- ✗
--destination-ranges
Why it's wrong here
Destination ranges are used for egress rules.
- ✓
--target-service-accounts
Why this is correct
Correct. Specifies which service accounts the rule applies to.
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JA
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.