Oracle Cloud Infrastructure 1z0-1124-25 Syllabus Exam Questions Answers

Objective:Enable transitive routing via a network appliance (e.g., firewall) between VCNs.

Transitive Routing Setup:DRG connects VCNs; appliance processes traffic.

Key Requirement:DRG must route traffic to the appliance’s private IP.

Evaluate Options:

A:Service Gateway is for OCI services, not transitive routing; incorrect.

B:Static routes on DRG to appliance ensure correct traffic flow; essential.

C:Load Balancer is optional, not essential for routing; incorrect.

D:LPG is for intra-region VCN peering, not appliance-DRG connection; incorrect.

Conclusion:DRG static routes to the appliance are critical for transitive routing.

Transitive routing with a network appliance requires explicit routing configuration. The Oracle Networking Professional study guide notes, "To enable transitive routing through a network appliance, configure static routes in the DRG route table pointing to the appliance’s private IP as the next hop" (OCI Networking Documentation, Section: Transitive Routing with DRG). This ensures traffic is processed by the appliance between VCNs.

Requirement:Private VCN connection across tenancies.

Services:

Internet Gateway:Public access; incorrect.

Service Gateway:OCI services, not VCNs; incorrect.

RPC:Cross-tenancy private peering; correct.

DRG with LPG:LPG is intra-region, not cross-tenancy; incorrect.

Evaluate Options:

A:Public; incorrect.

B:Service-focused; incorrect.

C:Designed for this scenario; correct.

D:Misaligned components; incorrect.

Conclusion:RPC is the right service.

RPC enables cross-tenancy peering. The Oracle Networking Professional study guide notes, "Remote Peering Connections (RPCs) establish private connectivity between VCNs in different tenancies over OCI’s private backbone" (OCI Networking Documentation, Section: Remote Peering Connections). This ensures no public internet traversal.

Requirement Analysis: The solution needs a private, high-bandwidth, low-latency connection (provided by FastConnect) with encryption for data confidentiality.

Option A (IPSec VPN): IPSec encrypts traffic at Layer 3 over public or private networks. While feasible over FastConnect, it’s redundant since FastConnect is already private, adding unnecessary overhead and complexity.

Option B (OCI Vault): Vault manages encryption keys and secrets but doesn’t encrypt traffic itself—only supports application-level encryption, not link-level—incorrect.

Option C (MACsec): MACsec (Media Access Control Security) provides Layer 2 encryption for Ethernet traffic, ideal for securing FastConnect’s dedicated link directly between devices, ensuring confidentiality without higher-layer overhead—correct.

Option D (OCI Bastion): Bastion secures remote access to VCN resources, not link encryption—incorrect.

Conclusion: MACsec enhances FastConnect with efficient, link-level encryption, meeting all requirements.

Oracle documentation states:

"MACsec provides Layer 2 encryption for FastConnect, securing Ethernet traffic between on-premises and OCI infrastructure. It’s ideal for ensuring confidentiality over dedicated connections."This supports Option C as the best additional product. Reference:FastConnect Security Options - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/fastconnect.htm#security).

Requirement: Secure outbound connection to a public API without exposing the instance.

Option A: Internet Gateway allows inbound and outbound traffic, exposing the instance—violates policy.

Option B: NAT Gateway enables outbound-only internet access from a private subnet. A security list restricts traffic to the API’s IP, ensuring security—correct.

Option C: Service Gateway is for OCI services, not third-party APIs—incorrect.

Option D: DRG with FastConnect is for private connections (e.g., on-premises), not internet APIs—incorrect.

Conclusion: Option B meets the policy and connectivity needs.

Oracle notes:

"A NAT Gateway allows instances in a private subnet to initiate outbound internet traffic without receiving inbound connections. Use security lists to restrict destinations."This supports Option B. Reference:NAT Gateway Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/NATgateway.htm).