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Oracle Cloud Infrastructure 2025 Networking Professional Sample Questions (Q84-Q89):

NEW QUESTION # 84
Which OCI service facilitates the creation of a private connection between two VCNs located in different tenancies, without traversing the public internet?

A. Service Gateway
B. Internet Gateway
C. Dynamic Routing Gateway (DRG) with Local Peering Gateway (LPG)
D. Remote Peering Connection (RPC)

Answer: D

Explanation:
* 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.

NEW QUESTION # 85
You have configured an IPSec VPN tunnel over your FastConnect circuit to OCI. You are experiencing intermittent connectivity issues and notice that the VPN tunnel is flapping (frequently going up and down).
You have verified the IKE and IPSec configuration and confirmed that the security policies are correct.
Which is a LESS likely cause of the VPN tunnel flapping when using IPSec over FastConnect, compared to using IPSec over the public internet?

A. MTU (Maximum Transmission Unit) misconfiguration leading to fragmentation.
B. Mismatched pre-shared keys or incorrect IKE/IPSec parameters.
C. BGP route flapping or instability.
D. Issues with network congestion or packet loss.

Answer: D

Explanation:
* Context: Tunnel flapping over FastConnect vs. public internet.
* Option A: Congestion/packet loss is less likely over FastConnect's dedicated link than the unpredictable public internet-correct.
* Option B: Mismatched keys/parameters would prevent tunnel establishment, not flapping-equally likely in both.
* Option C: MTU issues cause fragmentation in both scenarios-equally likely.
* Option D: BGP flapping is more relevant with FastConnect's dynamic routing-more likely here.
* Conclusion: Option A is less likely over FastConnect.
Oracle notes:
* "FastConnect provides a stable, dedicated connection, reducing congestion and packet loss compared to public internet VPNs."This supports Option A. Reference:IPSec over FastConnect - Oracle Help Center (docs.oracle.com/en-us/iaas/Content/Network/Tasks/settingupIPSec.htm#fastconnect).

NEW QUESTION # 86
Your company is migrating its legacy application to OCI. This application uses self-signed certificates. As part of the migration, you want to replace these with certificates issued by a trusted Certificate Authority (CA) managed through OCI Certificates. What is the most secure and recommended method to handle this transition?

A. Obtain certificates from OCI Certificates, gradually replace self-signed certificates on application servers, and update the truststores on client systems to include the OCI Certificates CA.
B. Configure OCI WAF to bypass certificate validation for the legacy application.
C. Import the self-signed certificates into OCI Certificates and continue using them until they expire.
D. Immediately replace the self-signed certificates on all application servers with certificates issued by OCI Certificates, without any gradual rollout.

Answer: A

Explanation:
* Objective: Securely transition from self-signed to trusted CA certificates.
* Option A: Importing self-signed certificates into OCI Certificates doesn't improve security-incorrect.
* Option B: Immediate replacement risks outages if clients don't trust the new CA-unrecommended.
* Option C: Gradual replacement with OCI Certificates, updating client truststores, ensures security and minimizes disruption-correct.
* Option D: Bypassing validation via WAF weakens security-incorrect.
* Conclusion: Option C is the most secure and recommended method.
Oracle advises:
* "Replace self-signed certificates with OCI Certificates from a trusted CA. Perform a phased rollout and update client truststores to avoid disruptions."This validates Option C. Reference:OCI Certificates Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Security/Certificates/overview.
htm).

NEW QUESTION # 87
Your company is migrating an on-premises application to OCI. The application requires direct, low-latency access to an on-premises Microsoft SQL Server database. You've established a FastConnect connection between your on-premises network and an OCI VCN via a Dynamic Routing Gateway(DRG). You want to access this database from the OCI VCN. Which type of endpoint, in conjunction with appropriate routing, should you use to facilitate this connection?

A. A Service Gateway configured to access the on-premises SQL Server.
B. No specific OCI endpoint is required. The on-premises SQL Server is accessed directly through the DRG and appropriate routing.
C. A Private Endpoint within the VCN configured to connect to the private IP address of the on-premises SQL Server.
D. An Internet Gateway with a public endpoint on the SQL Server.

Answer: B

Explanation:
* Requirement: Low-latency, direct access to an on-premises SQL Server via FastConnect.
* Option A: Internet Gateway with a public endpoint exposes the SQL Server to the internet, increasing latency and security risks-incorrect.
* Option B: Service Gateway is for OCI services (e.g., Object Storage), not on-premises resources- incorrect.
* Option C: FastConnect with a DRG provides a private, low-latency link. No additional OCI endpoint is needed; the SQL Server's private IP is accessed directly via DRG routing-correct.
* Option D: Private Endpoints are for OCI services within the VCN (e.g., ADB), not on-premises resources-incorrect.
* Conclusion: Option C leverages FastConnect and DRG for direct, secure access.
Oracle documentation notes:
* "FastConnect with a DRG enables private, low-latency connectivity to on-premises networks.
Configure route tables to access on-premises resources directly; no additional endpoints are required." This supports Option C. Reference:FastConnect Overview - Oracle Help Center(docs.oracle.com/en-us
/iaas/Content/Network/Tasks/fastconnect.htm).

NEW QUESTION # 88
You are designing an OCI VCN for a new application with the following requirements: The application servers in a private subnet must be able to download software updates from public repositories on the internet; the application servers must NOT be directly accessible from the public internet; the application servers must also be able to access Oracle Cloud Infrastructure Registry (OCIR) within the same region to pull container images. Which combination of VCN Gateways BEST meets these requirements?

A. Internet Gateway and Service Gateway
B. Dynamic Routing Gateway (DRG) and Internet Gateway
C. NAT Gateway and Internet Gateway
D. NAT Gateway and Service Gateway

Answer: D

Explanation:
* Requirements: Outbound internet access, no inbound exposure, and private OCIR access.
* Option A: Internet Gateway allows inbound traffic, violating the no-exposure rule-incorrect.
* Option B: NAT Gateway enables outbound-only internet access, but Internet Gateway adds inbound exposure-incorrect.
* Option C: NAT Gateway provides outbound internet access without inbound exposure; Service Gateway enables private OCIR access-correct.
* Option D: DRG is for external networks, not internet/OCIR access; Internet Gateway exposes servers- incorrect.
* Conclusion: Option C satisfies all requirements.
Oracle states:
* "Use a NAT Gateway for outbound internet access from private subnets without inbound connectivity.
Use a Service Gateway for private access to OCI services like OCIR."This supports Option C.
Reference:NAT and Service Gateway Overview - Oracle Help Center(docs.oracle.com/en-us/iaas
/Content/Network/Tasks/NATgateway.htm & docs.oracle.com/en-us/iaas/Content/Network/Tasks
/servicegateway.htm).

NEW QUESTION # 89
......

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