1Z0-1085-26 Core Oci Services Practice Question
A security administrator wants to implement stateful packet filtering at the individual instance level within a VCN subnet, allowing different rules to apply to different groups of instances in the same subnet. Which OCI feature should be used?
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) act as virtual firewalls that provide security rules applied to a specified set of VNICs, unlike security lists which apply to entire 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.
- ✗
Dynamic Routing Gateway firewall rules
Why it's wrong here
DRGs route traffic across networks and do not filter instance-level traffic.
- ✗
Security Lists
Why it's wrong here
Security Lists apply to all VNICs in an entire subnet, not individual instances selectively.
- ✗
Internet Gateway security policies
Why it's wrong here
Internet Gateways do not provide instance-level packet filtering.
- ✓
Network Security Groups (NSGs)
Why this is correct
NSGs allow fine-grained, instance-level security rules for specific VNICs within a subnet.
Visual reference
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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.