1Z0-1072-26 Networking Practice Question
An Oracle Cloud Infrastructure (OCI) architect needs to configure a Virtual Cloud Network (VCN) with a public subnet and a private subnet. Which configuration is required for resources in the private subnet to reach the public internet through a NAT Gateway?
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
✓
Add a route in the private subnet route table with a destination of 0.0.0.0/0 and the target as the NAT Gateway.
A NAT Gateway allows instances in a private subnet to initiate connections to the internet, but prevents inbound connections from the internet. The route table associated with the private subnet must have a route pointing 0.0.0.0/0 to the NAT Gateway.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Add a route in the private subnet route table with a destination of 0.0.0.0/0 and the target as the NAT Gateway.
Why this is correct
This is the correct configuration to route outbound traffic from the private subnet to the NAT Gateway.
- ✗
Attach an Internet Gateway directly to the private subnet and add a security list rule allowing egress to 0.0.0.0/0.
Why it's wrong here
Internet Gateways are attached to VCNs and used by public subnets, not private subnets.
- ✗
Configure a Service Gateway with a route to 0.0.0.0/0.
Why it's wrong here
Service Gateways are used to access Oracle services in the Oracle Services Network, not the general public internet.
- ✗
Assign a public IP address to the instances within the private subnet.
Why it's wrong here
Private subnets cannot have public IP addresses assigned to their VNICs by design.
Visual reference
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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
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