1Z0-1085-26 Core Oci Services Practice Question
An administrator wants to restrict inbound SSH access to a specific group of database compute instances without modifying subnet-level security rules. Which OCI feature should be used to define these fine-grained VNIC rules?
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
Network Security Groups (NSGs) allow you to apply security rules to a specific set of VNICs of your choice, independent of subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Route Tables
Why it's wrong here
Route tables govern packet routing rather than security filtering.
- ✗
Security Lists
Why it's wrong here
Security lists apply rules to all VNICs within an entire subnet.
- ✓
Network Security Groups
Why this is correct
NSGs apply to specific sets of VNICs chosen by the administrator.
- ✗
Dynamic Routing Gateway
Why it's wrong here
Dynamic Routing Gateways route traffic between VCNs and external networks.
Visual reference
About these practice questions
This 1Z0-1085-26 question is part of Courseiva's 378-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam 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 1Z0-1085-26 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.