1Z0-1085-26 Core Oci Services Practice Question
A security engineer is designing a zero-trust architecture for a microservices environment in OCI. Traffic between compute instances in different subnets must be restricted based on individual workload roles rather than entire subnet CIDR blocks. Which OCI networking feature should be implemented?
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
✓
Network Security Groups (NSGs)
Network Security Groups (NSGs) provide virtual firewall rules for a set of VNICs of your choice, allowing fine-grained security rules independent of subnet architecture.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Security Lists
Why it's wrong here
Security Lists apply stateful or stateless firewall rules to all VNICs in an entire subnet, lacking instance-level granularity.
- ✗
Local Peering Gateways
Why it's wrong here
Local Peering Gateways connect VCNs together, they do not provide workload-level traffic filtering.
- ✗
Stateful Route Tables
Why it's wrong here
Route tables manage packet routing paths, not packet security filtering or access control.
- ✓
Network Security Groups (NSGs)
Why this is correct
NSGs allow defining security rules that apply to a specific set of VNICs, regardless of which subnets they reside in.
Visual reference
About these practice questions
One of 378 original 1Z0-1085-26 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. 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 1Z0-1085-26 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 1Z0-1085-26 exam.