1Z0-1072-26 Networking Practice Question
An OCI customer has configured an IPSec VPN connection with static routing. They add a new subnet with CIDR 10.0.5.0/24 to their VCN, but on-premises hosts cannot communicate with instances in this new subnet. What must be updated in the IPSec VPN configuration?
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 the new VCN subnet CIDR (10.0.5.0/24) to the static routes in the OCI IPSec Connection configuration.
When using static routing for an OCI Site-to-Site VPN, you must define the static route rules (on-premises networks and VCN static routes) in the OCI IPSec connection configuration so Oracle knows which traffic to tunnel.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Recreate the Customer-Premises Equipment (CPE) object.
Why it's wrong here
The CPE object only represents the remote peer public IP and does not need recreation for subnet changes.
- ✓
Add the new VCN subnet CIDR (10.0.5.0/24) to the static routes in the OCI IPSec Connection configuration.
Why this is correct
Static IPSec connections require explicit static route definitions in OCI for all destination subnets.
- ✗
Switch the VPN from static routing to a NAT Gateway.
Why it's wrong here
NAT Gateways do not manage Site-to-Site VPN static routes.
- ✗
Update the VCN Internet Gateway routing table.
Why it's wrong here
VPN traffic uses the DRG, not the Internet Gateway.
Visual reference
Quick reference
VPN Protocol Comparison
| Protocol | Port | Encryption | Authentication | Use Case |
|---|---|---|---|---|
| IKEv2 / IPsec | UDP 500 / 4500 | AES-256 | Certificates / PSK | Site-to-site & remote access |
| SSL / TLS VPN | TCP 443 | TLS 1.3 | Certificates / MFA | Clientless remote access |
| L2TP / IPsec | UDP 1701 | AES (IPsec) | PSK / Certificates | Legacy remote access |
| WireGuard | UDP 51820 | ChaCha20 | Public keys | Modern high-performance VPN |
| PPTP | TCP 1723 | MPPE (weak) | MS-CHAPv2 | Legacy — avoid in production |
PPTP is considered insecure. IKEv2/IPsec and SSL VPN are the current recommended options.
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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.