1Z0-997-26 Multicloud And Hybrid Practice Question
An architect is designing a multi-cloud application where microservices in OCI need to communicate securely with microservices in Azure. They decide to deploy a service mesh (such as Istio) spanning both OCI and Azure. What network prerequisite is essential across the OCI VCN and Azure VNet for the control plane to communicate?
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
✓
Establish private IP connectivity between the OCI VCN and Azure VNet via the OCI-Azure Interconnect with matching non-overlapping subnets and open firewall ports for control plane communication.
A cross-cloud service mesh requires IP reachability between the control plane and data planes across the VCN and VNet, typically facilitated by the OCI-Azure Interconnect and properly configured routing and security rules.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure an OCI Service Gateway to route traffic to Azure public endpoints.
Why it's wrong here
Service Gateways only route to OCI public services, not Azure.
- ✗
Deploy an OCI NAT Gateway to translate all Azure IP addresses to OCI public IPs.
Why it's wrong here
NAT breaks mutual TLS and service mesh identity discovery.
- ✓
Establish private IP connectivity between the OCI VCN and Azure VNet via the OCI-Azure Interconnect with matching non-overlapping subnets and open firewall ports for control plane communication.
Why this is correct
Service mesh cross-cloud communication requires robust private IP routing and open ports for control/data plane discovery.
- ✗
Enable Oracle Autonomous Database cross-region data guard.
Why it's wrong here
Data Guard is for database replication, not service mesh networking.
About these practice questions
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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.