1Z0-997-26 Security Practice Question
Which THREE practices are recommended when hardening OCI VCN network security? (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
✓
Isolate workloads into private subnets whenever public access is not required.
VCN security hardening includes subnets, NSGs, and limiting internet gateways.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Expose all database management ports to the 0.0.0.0/0 CIDR block.
Why it's wrong here
Exposing database ports globally is a catastrophic security risk.
- ✓
Isolate workloads into private subnets whenever public access is not required.
Why this is correct
Private subnets protect workloads from direct internet exposure.
- ✓
Implement stateful security rules to automatically allow return traffic for established connections.
Why this is correct
Stateful rules simplify rule management by automatically allowing return packets.
- ✓
Use Network Security Groups (NSGs) for granular, VNIC-level traffic filtering.
Why this is correct
NSGs provide precise control over individual instance traffic.
- ✗
Attach an Internet Gateway to every private subnet by default.
Why it's wrong here
Private subnets should never have Internet Gateways attached.
Visual reference
About these practice questions
Courseiva writes every 1Z0-997-26 question from scratch — 344 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Oracle exam blueprint
This 1Z0-997-26 practice question is part of Courseiva's free Oracle 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 1Z0-997-26 exam.