1Z0-1072-26 Networking Practice Question
You have deployed an OCI VCN with a CIDR of 192.168.0.0/16. You want to peer this VCN with another VCN that has a CIDR of 192.168.64.0/18. Will this local peering succeed?
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
✓
No, because the VCN CIDR blocks overlap.
Local VCN peering requires that the peering VCNs have non-overlapping CIDR blocks. Since 192.168.64.0/18 is completely contained within 192.168.0.0/16, the CIDRs overlap, and peering will fail.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Yes, as long as both VCNs are in the same compartment.
Why it's wrong here
Compartment location does not bypass the non-overlapping CIDR requirement.
- ✗
No, because VCNs must have identical CIDR sizes to peer.
Why it's wrong here
VCNs do not need identical CIDR sizes, but they must be non-overlapping.
- ✓
No, because the VCN CIDR blocks overlap.
Why this is correct
Overlapping CIDR blocks prevent successful VCN peering and routing.
- ✗
Yes, because the second VCN CIDR is a subnet of the first.
Why it's wrong here
VCNs cannot have overlapping CIDRs even if one is smaller than the other.
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
This 1Z0-1072-26 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 1Z0-1072-26 exam.