1Z0-1085-26 Core Oci Services Practice Question
An application deployment in a VCN private subnet needs to query external APIs hosted on the public internet, but malicious actors must not be able to initiate inbound connections to the application instances. Which combination of VCN gateways provides this required behavior?
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
✓
NAT Gateway combined with a Security List blocking all inbound traffic from 0.0.0.0/0
A NAT Gateway allows instances in a private subnet to initiate outbound connections to the internet while blocking all unsolicited inbound connections.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Internet Gateway combined with a Service Gateway
Why it's wrong here
An Internet Gateway allows both inbound and outbound public internet traffic unless restricted by security lists.
- ✗
Dynamic Routing Gateway combined with a NAT Gateway
Why it's wrong here
A DRG is used for hybrid on-premises connectivity, not general public internet routing.
- ✓
NAT Gateway combined with a Security List blocking all inbound traffic from 0.0.0.0/0
Why this is correct
A NAT Gateway allows outbound traffic, and Security Lists control packet filtering to block unsolicited inbound traffic.
- ✗
Local Peering Gateway combined with an Internet Gateway
Why it's wrong here
Local Peering Gateways connect VCNs, not the internet.
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.