1Z0-997-26 Workload Migration Practice Question
You are migrating a legacy application that relies on hardcoded IP addresses for inter-service communication. During the migration to OCI VCNs, you need to ensure that virtual machines can resolve each other's hostnames dynamically without maintaining manual /etc/hosts files. What OCI networking feature should you configure?
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
✓
OCI Default VCN Resolver with assigned hostname prefixes
OCI provides default VCN DNS resolution and custom DNS resolver settings, allowing instances within a VCN or peered VCNs to resolve hostnames automatically via Internet and VCN Resolver.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
OCI API Gateway DNS forwarding rules
Why it's wrong here
API Gateway routes HTTP API calls, not internal OS-level VCN hostname resolution.
- ✓
OCI Default VCN Resolver with assigned hostname prefixes
Why this is correct
The default VCN resolver automatically assigns and resolves DNS hostnames for instances within the VCN.
- ✗
OCI Streaming service message brokers
Why it's wrong here
Streaming is a Kafka-compatible messaging service, unrelated to DNS hostname resolution.
- ✗
OCI Network Load Balancer hostname rewriting
Why it's wrong here
Network Load Balancers operate at L4 and do not rewrite DNS or hostnames.
Visual reference
About these practice questions
This 1Z0-997-26 question is part of Courseiva's 344-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 1Z0-997-26 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.