1z0-1124-25 Oracle Cloud Infrastructure 2025 Networking Professional Questions and Answers

Requirements: Low latency, high security with encryption for migration.

Option A: VPN with IPSec offers encryption but has higher latency over public internet—less optimal.

Option B: ExpressRoute and FastConnect provide a private, low-latency link; TLS adds end-to-end encryption—correct and best combination.

Option C: Data Factory with HTTPS is encrypted but slow and not real-time—incorrect.

Option D: VPN with Load Balancer SSL termination breaks end-to-end encryption—incorrect.

Conclusion: Option B balances performance and security.

Oracle notes:

"For latency-sensitive migrations, use FastConnect with ExpressRoute via colocation, enhanced by TLS for secure, high-performance data transfer.”This supports Option B. Reference:Multicloud Connectivity - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/multicloud.htm).

Problem: OKE pods can’t resolve private DB IP despite VCN DNS working.

Option A: CoreDNS in OKE must forward to VCN’s resolver for private IPs; misconfiguration is a common issue—correct.

Option B: Security lists block traffic, not resolution; VCN DNS isn’t hosted on the DB—incorrect.

Option C: Public endpoint affects API access, not internal DNS—incorrect.

Option D: Route tables don’t control DNS resolution—incorrect.

Conclusion: Option A is the most probable cause.

Oracle notes:

"CoreDNS in OKE must be configured to forward queries to the VCN’s DNS resolver (.169 address) for private IP resolution."This supports Option A. Reference:OKE DNS Configuration - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/ContEng/Tasks/contengdns.htm).

Objective:Grant requesting tenancy permission to initiate an RPC to the target tenancy.

RPC Process:Requires the requesting tenancy to create and connect the RPC, which needs specific IAM permissions in the target tenancy.

IAM Verbs:

manage:Broad permissions, too permissive for RPC initiation.

use:Allows creation and connection of RPCs, precise for this task.

inspect:Read-only, insufficient for initiating connections.

read:Read-only, insufficient for initiating connections.

Evaluate Options:

A:Too broad, includes unnecessary permissions; incorrect.

B:Precise permission for RPC initiation; correct.

C:Read-only, doesn’t allow connection; incorrect.

D:Read-only, doesn’t allow connection; incorrect.

Conclusion:"use remote-peering-connections" is the essential policy.

RPCs require specific IAM policies for cross-tenancy connectivity. The Oracle Networking Professional study guide states, "To initiate a Remote Peering Connection, the requesting tenancy needs an IAM policy with the 'use remote-peering-connections' verb targeting the acceptor tenancy’s OCID" (OCI Networking Documentation, Section: Remote Peering Connections). This ensures controlled access for connection establishment.

Requirements:Low latency, high bandwidth, multi-region VCNs via one FastConnect, minimal cost/overhead.

DRG Strategy:

Multiple DRGs:Increases cost and complexity.

Single DRG:Centralizes management, reduces FastConnect attachments.

Evaluate Options:

A:Multiple DRGs and FastConnects; costly and complex; incorrect.

B:Remote peering connections imply RPC, not standard DRG attachments; less precise.

C:Single DRG with remote peering attachments; efficient and correct terminology; optimal.

D:LPGs are intra-region, not cross-region; incorrect.

Conclusion:Single DRG with remote peering attachments is most efficient.

A single DRG optimizes multi-region setups. The Oracle Networking Professional study guide notes, "For connecting multiple VCNs across regions to a single FastConnect, use one DRG with remote peering attachments to minimize cost and management overhead" (OCI Networking Documentation, Section: DRG with FastConnect). Option C aligns with OCI’s recommended architecture.

Requirements: Low latency, high bandwidth for multicloud production.

Option A: Dedicated peering via third-party provider offers high performance—optimal.

Option B: IPSec VPNs over public internet have variable latency and limited bandwidth—least optimal.

Option C: FastConnect peering with partners ensures dedicated performance—optimal.

Option D: OCI-Azure Interconnect is fast, but VPN to AWS adds latency—less optimal than A or C but better than B.

Conclusion: Option B is the least optimal due to performance constraints.

Oracle notes:

"IPSec VPNs over public internet provide security but lack the bandwidth and latency consistency of dedicated connections like FastConnect for production workloads.”This supports Option B as least optimal. Reference:Multicloud Connectivity Options - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/multicloud.htm#options).

Transitive Routing Goal:Traffic from a VCN to an on-premises network via DRG.

DRG Role:Acts as a virtual router connecting VCNs and on-premises networks.

Routing Options:

Static Routes:Manually defined, less scalable for dynamic environments.

Dynamic Routing (BGP):Automatically exchanges routes, ideal for hybrid setups.

Evaluate Options:

A:Static routes work but require manual updates; less efficient.

B:BGP dynamically propagates routes, ensuring correct routing; best fit.

C:LPG is for intra-region peering, not on-premises connectivity; incorrect.

D:Service Gateway is for OCI services, not on-premises; incorrect.

Conclusion:BGP ensures scalable, accurate routing through the DRG.

The DRG supports transitive routing with dynamic protocols like BGP. The Oracle Networking Professional study guide states, "For transitive routing between VCNs and on-premises networks via a DRG, configuring BGP on the DRG and CPE enables automatic route propagation, ensuring traffic is correctly routed" (OCI Networking Documentation, Section: Dynamic Routing Gateway). BGP is preferred over static routes for hybrid cloud scenarios.

Problem: Instances with IPv6-only traffic can’t ping external IPv6 addresses despite FastConnect and IPv6 prefixes.

Option A: OCI supports Bring Your Own IP (BYOIP) for IPv6, including global unicast addresses, so this is incorrect.

Option B: NAT Gateways are for IPv4 outbound traffic, not IPv6—irrelevant here.

Option C: For IPv6-only instances to reach external IPv6 addresses (beyond FastConnect),an Internet Gateway (IGW) is required with a default route (::/0) in the subnet route table. This enables public IPv6 connectivity—correct.

Option D: Service Gateway is for OCI services, not general IPv6 internet access—incorrect.

Conclusion: Option C fixes the issue by enabling IPv6 internet access.

Oracle states:

"To enable IPv6 traffic to the internet, attach an Internet Gateway to the VCN and add a route rule for ::/0. OCI supports BYOIP for public IPv6 prefixes."This aligns with Option C. Reference:IPv6 in OCI - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/managingIPv6.htm).

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).

Context: Inter-tenancy VCN peering connects VCNs across different OCI tenancies using Remote Peering Connections (RPCs).

Option A: Authentication of the root user is handled by IAM policies, not the peer ID, which is a technical identifier—incorrect.

Option B: The peer ID is the OCID of the RPC created by the requesting tenancy. It uniquely identifies the RPC, allowing the accepting tenancy to target and establish the peering—correct.

Option C: CIDR blocks are part of VCN configuration and shared separately, not via thepeer ID—incorrect.

Option D: Security rules are defined by NSGs or security lists, not the peer ID—incorrect.

Conclusion: The peer ID’s purpose is to identify the requesting tenancy’s RPC, making Option B the correct answer.

From Oracle’s documentation:

"For inter-tenancy peering, the requesting tenancy provides the OCID of its Remote Peering Connection (RPC), known as the peer ID, to the accepting tenancy. The accepting tenancy uses this ID to establish the peering."This confirms Option B. Reference:Remote VCN Peering Across Tenancies - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/remoteVCNpeering.htm#cross-tenancy).

Objective:Efficiently propagate on-premises route updates to multiple VCNs.

DRG Capabilities:Supports route distribution to attached VCNs.

Analyze Options:

A:Manual updates are inefficient and error-prone; unsuitable.

B:Centralized DRG with route distribution automates propagation; efficient.

C:Multiple DRGs add complexity and manual effort; inefficient.

D:Service Gateway is for OCI services, not route updates; incorrect.

Conclusion:Centralized DRG with route distribution is the most efficient method.

Route distribution in a DRG simplifies multi-region routing. The Oracle Networking Professional study guide notes, "Using a centralized DRG with route distribution enabled allows routes learned from on-premises networks to be automatically propagated to all attached VCNs, reducing management overhead" (OCI Networking Documentation, Section: DRG Route Distribution). This leverages OCI’s automation capabilities.

Problem:Instances lack IPv6 addresses despite VCN IPv6 configuration.

OCI IPv6 Behavior:IPv6 requires subnet enablement and OS support via SLAAC.

Evaluate Options:

A:Incorrect. OCI doesn’t auto-assign IPv6 without OS configuration.

B:Correct. SLAAC must be enabled on the instance OS for auto-assignment.

C:Incorrect. IPv6 works in both public and private subnets.

D:Incorrect. IPv4 and IPv6 assignments are independent.

Conclusion:Enabling SLAAC on the OS ensures automatic IPv6 assignment.

IPv6 in OCI relies on SLAAC for automatic address assignment. The Oracle Networking Professional study guide states, "To enable IPv6 on instances, the VCN and subnet must have IPv6 CIDR blocks, and the instance OS must support SLAAC to automatically configure IPv6 addresses" (OCI Networking Documentation, Section: IPv6 Configuration). Without SLAAC, instances default to IPv4 only.

Goal: Secure, granular access control to ADB from private subnet instances.

Option A: Public endpoint with NSGs exposes ADB to the internet, increasing risk despite NSG restrictions—less secure than private options.

Option B: Service Gateway provides private access to OCI services, but it’s not specific to ADB instances and lacks the instance-level granularity of private endpoints.

Option C: Private ADB endpoint assigns a private IP within the VCN, keeping traffic internal. NSGs allow precise, stateful control to specific instances, offering the most granular security.

Option D: DRG is for external connections (e.g., on-premises), not internal VCN-to-ADB access.

Conclusion: Option C provides the most secure and granular control.

Oracle documentation notes:

"Private endpoints for Autonomous Database provide a private IP within your VCN, ensuring traffic stays off the public internet. Use NSGs for fine-grained access control to specific instances."This supports Option C. Reference:Autonomous Database Networking - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Database/Tasks/adbconnecting.htm).

Needs: Private, dedicated connection for large data transfers to Object Storage.

Option A: VPN with Service Gateway uses public internet, limiting bandwidth—incorrect.

Option B: Internet Gateway exposes traffic publicly—incorrect.

Option C: FastConnect Private Peering provides a dedicated link, and Service Gateway ensures private Object Storage access—correct.

Option D: DRG with Internet Gateway isn’t private—incorrect.

Conclusion: Option C best meets the need.

Oracle states:

"FastConnect Private Peering combined with a Service Gateway enables secure, high-bandwidth access to Object Storage from on-premises networks."This supports Option C. Reference:FastConnect and Service Gateway - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/fastconnect.htm#servicegateway).

Understand the Requirement: The goal is high availability (HA) and automatic failover for a Site-to-Site VPN between an on-premises network and OCI with minimal disruption.

Evaluate Option A: A single VPN connection with one tunnel lacks redundancy. If the tunnel fails, there’s no failover mechanism, as OCI doesn’t inherently provide automatic failover for a single tunnel. This is a single point of failure.

Evaluate Option B: A single VPN connection with two tunnels using different CPE IP addresses leverages OCI’s IPSec VPN capabilities. OCI supports multiple tunnels per VPN connection, and using distinct CPE IPs (e.g., via different ISPs or devices) ensures that if one tunnel fails (due to ISP or CPE failure), the second tunnel remains active. OCI’s Dynamic Routing Gateway (DRG) automatically reroutes traffic to the active tunnel using IKE and IPSec health checks.

Evaluate Option C: Two separate VPN connections, each with one tunnel and different CPE IPs, also provide HA. Using BGP, routes are advertised redundantly. However, managing two VPN connections is more complex than a single connection with two tunnels, and BGP failover might introduce slight delays compared to IPSec tunnel failover.

Evaluate Option D: Two tunnels with the same CPE IP address within one VPN connection don’t provide true HA. If the CPE or its ISP fails, both tunnels fail, as they share a single point of failure.

Conclusion: Option B is the simplest, most resilient configuration that ensures automatic failover with minimal disruption using OCI’s native VPN capabilities.

OCI’s Site-to-Site VPN supports multiple tunnels within a single IPSec connection for redundancy. According to the Oracle Help Center:

"You can configure multiple tunnels for a single IPSec connection to provide redundancy. OCI uses IKE (Internet Key Exchange) to monitor tunnel health and automatically fails over to an active tunnel if one becomes unavailable."

"For maximum availability, use different CPE public IP addresses for each tunnel (e.g., different ISPs or devices)."This aligns with Option B, ensuring HA without the complexity of separate VPN connections or BGP. Reference:Site-to-Site VPN Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/settingupIPSec.htm).

Constraints: High bandwidth, low latency, secure private connection, redundancy.

Option A: Single VPN Connect offers security but lacks high bandwidth, low latency, and redundancy—unsuitable for migration needs.

Option B: Multiple VPNs improve redundancy but still rely on public internet, limiting bandwidth and latency performance compared to dedicated circuits.

Option C: Single FastConnect provides high bandwidth, low latency, and privacy via a dedicated line, but lacks redundancy.

Option D: Multiple FastConnect circuits ensure high bandwidth and low latency with redundancy. Adding multiple VPNs as backup enhances resilience, meeting all constraints.

Conclusion: Option D is the most suitable and resilient, balancing performance and continuity.

Oracle states:

"FastConnect provides a private, high-bandwidth, low-latency connection to OCI. Use multiple circuits for redundancy."

"Combine FastConnect with IPSec VPN for additional failover options."Option D aligns with this guidance. Reference:FastConnect Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/fastconnect.htm).

Goal: Support Zero Trust with packet flow monitoring.

Option A: Static routing defines paths, not monitoring—incorrect.

Option B: Security lists control access, not monitor—incorrect.

Option C: Flow logs track traffic; audit trails log actions—essential for Zero Trust—correct.

Option D: Public IPs enable access, not monitoring—incorrect.

Conclusion: Option C is essential.

Oracle states:

"Flow logs and audit trails provide continuous monitoring and verification of packet flows, critical for Zero Trust Packet Routing."This supports Option C. Reference:Zero Trust in OCI - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/zerotrust.htm).

Requirements:Low-latency, minimal overhead for TCP connections, no session persistence.

Load Balancer Types:

Application Load Balancer (ALB):Layer 7, higher overhead, suited for HTTP/HTTPS.

Network Load Balancer (NLB):Layer 4, low overhead, ideal for TCP/UDP.

Evaluate Options:

A:ALB with HTTP checks is for HTTP traffic, adds overhead; unsuitable.

B:NLB with TCP checks is optimized for TCP, low latency; best fit.

C:ALB with TCP checks still has Layer 7 overhead; less efficient.

D:“Flexible Load Balancer” isn’t a specific OCI service; incorrect.

Conclusion:NLB minimizes latency and overhead for TCP connections.

The Network Load Balancer is designed for high-performance TCP scenarios. The Oracle Networking Professional study guide states, "Network Load Balancer operates at Layer 4, providing low-latency, high-throughput load balancing for TCP/UDP traffic with minimal overhead, ideal for database connections" (OCI Networking Documentation, Section: Load Balancing). TCP health checks ensure instance availability without session persistence complexity.

Requirement:Private access to Object Storage from a private subnet.

Components:

Internet Gateway:Public internet access; unsuitable.

NAT Gateway:Outbound internet; unsuitable.

Service Gateway:Private OCI service access; fits requirement.

Network Firewall:Security, not routing; incorrect.

Evaluate Options:

A:Public internet; violates policy.

B:Public internet; violates policy.

C:Keeps traffic in OCI network; correct.

D:Doesn’t enable access; incorrect.

Conclusion:Service Gateway ensures private access.

Service Gateway is designed for private OCI service access. The Oracle Networking Professional study guide explains, "A Service Gateway allows private subnet instances to access Object Storage without traversing the public internet, ensuring secure data transfer within OCI" (OCI Networking Documentation, Section: Service Gateway). This meets the security requirement.

Symptoms:VPN tunnel drops intermittently despite stable internet and IKE settings.

VPN Components:Requires IKE (UDP 500/4500) and ESP (IP 50) traffic.

Evaluate Options:

A:Incorrect CPE IP would prevent tunnel establishment, not intermittent drops; incorrect.

B:DRG outage would cause full downtime, not intermittent; unlikely.

C:Security rules blocking IKE/ESP intermittently (e.g., rate limiting) is common; most likely.

D:NAT-Traversal issues typically prevent initial setup, not intermittent drops; less likely.

Conclusion:Security rule misconfiguration is the most probable cause.

VPN stability depends on unblocked IKE and ESP traffic. The Oracle Networking Professional study guide notes, "Intermittent VPN tunnel drops are often caused by security rules or firewalls blocking IKE (UDP 500/4500) or ESP (IP Protocol 50) traffic" (OCI Networking Documentation, Section: Site-to-Site VPN Troubleshooting). This aligns with the scenario’s symptoms.

Requirements:HTTP/HTTPS + TCP, advanced routing, WAF protection.

Load Balancers:

NLB:Layer 4, no HTTP routing or WAF; unsuitable.

ALB:Layer 7, supports routing and WAF; fits perfectly.

Flexible LB:Not a specific OCI service; incorrect.

LBaaS:Generic term, not a product; incorrect.

Evaluate Options:

A:Lacks Layer 7 and WAF; incorrect.

B:Meets all needs with ALB + WAF; correct.

C:Non-existent; incorrect.

D:Too vague; incorrect.

Conclusion:Application Load Balancer is most suitable.

ALB supports complex e-commerce needs. The Oracle Networking Professional study guide states, "Application Load Balancer operates at Layer 7, offering content-based and path-based routing, and integrates with OCI WAF for exploit protection" (OCI Networking Documentation, Section: Application Load Balancer). This aligns with all requirements.

Goal:Stable endpoint for MySQL DB with HA failover support.

Endpoint Options:

Public IP:Exposed, changes on failover; unsuitable.

DNS with Floating IP:Persistent across failovers; ideal.

Private IP:Tied to primary, fails on switch; incorrect.

Service Gateway:For OCI services, not MySQL DB; incorrect.

Evaluate Options:

A:Public exposure, no HA; incorrect.

B:Floating private IP with DNS ensures continuity; correct.

C:Static IP breaks on failover; incorrect.

D:Misaligned purpose; incorrect.

Conclusion:DNS with floating IP is most suitable.

MySQL DB in OCI uses floating IPs for HA. The Oracle Networking Professional study guide explains, "A DNS hostname resolving to the floating private IP of the active MySQL Database Service instance ensures seamless connectivity during failover events" (OCI Networking Documentation, Section: MySQL Database Service HA). This provides predictability and stability.

Objective: Reduce latency for remote users accessing private resources via Bastion.

Option A: Single Bastion increases latency for distant users—incorrect.

Option B: Multiple regional Bastions minimize latency by proximity—correct.

Option C: Dynamic port forwarding doesn’t address geographic latency—incorrect.

Option D: Load balancer aids HA, not latency reduction—incorrect.

Conclusion: Option B optimizes latency.

Oracle notes:

"Deploy Bastion hosts in multiple regions to reduce latency for geographically dispersed users accessing private resources."This supports Option B. Reference:Bastion Service Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Bastion/Concepts/bastionoverview.htm).

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).

Problem:VPN instability during peak hours due to latency and packet loss.

Evaluate Actions:

A:Optimizing IKE/IPSec reduces overhead; improves stability.

B:QoS prioritizes VPN traffic; enhances reliability.

C:Increasing MTU may worsen fragmentation if path MTU isn’t matched; least effective.

D:Dedicated interconnect eliminates internet issues; most effective.

MTU Insight:Raising MTU without path MTU discovery risks more fragmentation, not less.

Conclusion:Increasing MTU is least likely to help.

VPN stability requires addressing network conditions. The Oracle Networking Professional study guide notes, "Adjusting IKE/IPSec parameters or using QoS can stabilize VPN tunnels, while increasing MTU without path MTU alignment may exacerbate fragmentation" (OCI Networking Documentation, Section: VPN Troubleshooting). Dedicated interconnects are ideal, but MTU adjustment is risky here.

Objective:Enable DNSSEC to secure OCI DNS against spoofing.

DNSSEC Process:Requires enabling on the zone, generating keys, and updating the registrar.

Evaluate Options:

A:Steering policies manage traffic, not DNSSEC; incorrect.

B:OCI DNS auto-generates keys; manual upload unnecessary; incorrect.

C:Enabling DNSSEC starts the process, provides DS record; correct first step.

D:Resolver validation is client-side, not enabling DNSSEC; incorrect.

Conclusion:Enabling DNSSEC on the zone is the critical first step.

DNSSEC setup begins at the zone level. The Oracle Networking Professional study guide states, "The first step to enable DNSSEC in OCI DNS is to activate it on the zone, which generates keys and provides a DS record to share with your registrar" (OCI Networking Documentation, Section: DNSSEC Configuration). This establishes the chain of trust.

Requirement Breakdown: Maintain a specific public IP for external communication with high availability (HA).

Option A: Private IP with NAT Gateway is for outbound traffic from private subnets, not inbound public access. It doesn’t support a fixed public IP for external clients.

Option B: Network Load Balancer (NLB) preserves client IPs (source IP) but doesn’t allow reserving a specific public IP. IPs are assigned dynamically, failing the requirement.

Option C: Flexible Load Balancer (Application Load Balancer) supports reserving a public IP, ensuring the legacy IP is maintained. It also provides HA across Availability Domains (ADs).

Option D: Multiple load balancers with DNS round-robin don’t maintain a single IP—clients see different IPs, violating the requirement.

Conclusion: Option C meets both the specific IP and HA needs efficiently.

Per Oracle documentation:

"The Application Load Balancer (Flexible Load Balancer) allows you to reserve a public IP address, which can be associated with the load balancer for consistent external access."

"It provides high availability by distributing traffic across multiple backend instances."This supports Option C. Reference:Load Balancer Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Balance/Concepts/balanceoverview.htm).

Problem Scope:Identify and adjust WAF rules causing false positives in Detection mode without disrupting traffic.

Detection Mode Behavior:Logs potential violations without blocking, allowing analysis.

Evaluate Options:

A:Use OCI Logging Analytics to pinpoint rule IDs from logs, then set rules to "log only" for testing; efficient and non-disruptive.

B:Disabling all rules risks security and is time-consuming; inefficient.

C:Increasing sensitivity worsens false positives; counterproductive.

D:Whitelisting IPs is a temporary fix, not scalable or diagnostic; unsuitable.

Conclusion:Logging analysis with rule adjustment is the most efficient approach.

OCI WAF logs provide detailed insights for troubleshooting. The Oracle Networking Professional study guide states, "In Detection mode, WAF logs all triggered rules, which can be analyzed in OCI Logging Analytics to identify false positives. Rules can then be adjusted to 'log only' to refine policies without affecting traffic" (OCI Networking Documentation, Section: Web Application Firewall). This method ensures precision and minimal disruption.

Goal: Automate DNSSEC health monitoring with alerts.

Option A: Vulnerability Scanning is for compute instances, not DNSSEC—incorrect.

Option B: Monitoring Service tracks metrics and logs, supports custom DNSSEC metrics, and provides alarms—correct.

Option C: Audit Service logs API calls, not DNSSEC health—incorrect.

Option D: Logging Analytics analyzes logs but lacks direct alerting—less effective than Monitoring.

Conclusion: Option B is the most effective for automated monitoring and alerts.

Oracle documentation notes:

"OCI Monitoring Service allows you to monitor metrics and logs, including DNSSEC-related data, and set alarms for proactive notifications."This supports Option B. Reference:Monitoring Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Monitoring/Concepts/monitoringoverview.htm).

Requirements: App tier only initiates to DB; web tier to app tier only.

Option A: NSGs with forced routing through app tier adds complexity and latency—less effective.

Option B: Single NSG lacks subnet-level isolation—incorrect.

Option C: Separate security lists per subnet with ingress/egress rules enforce isolation; route tables ensure proper VCN routing—correct and effective.

Option D: Security lists are good, but routing web-to-DB via app tier is unnecessary—incorrect.

Conclusion: Option C achieves isolation efficiently.

Oracle states:

"Use separate security lists per subnet with ingress/egress rules to isolate tiers. Route tables manage intra-VCN traffic without forced hops."This supports Option C. Reference:Security Lists Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/securitylists.htm).

Requirement Analysis:The solution must ensure private access to Object Storage without public internet traversal, while being cost-effective.

Evaluate OCI Components:

Internet Gateway:Provides public internet access, unsuitable for private connectivity.

NAT Gateway:Allows outbound internet access from private subnets, but traffic still exits OCI.

Service Gateway:Enables private access to OCI services like Object Storage within the same region.

DRG with FastConnect:Used for on-premises connectivity, not intra-OCI service access.

Option Assessment:

A:Uses public internet, violating the security policy.

B:HTTPS encrypts data, but traffic traverses the internet via NAT, violating the policy.

C:Service Gateway keeps traffic within OCI’s private network, meeting security and cost goals.

D:Overly complex and costly, with public endpoints contradicting the requirement.

Conclusion:Service Gateway with regional Object Storage endpoints ensures private, secure, and cost-effective access.

The Service Gateway is designed for private access to OCI services like Object Storage, avoiding the public internet. The Oracle Networking Professional study guide states, "A Service Gateway allows instances in a private subnet to access supported OCI services without an Internet Gateway or NAT Gateway, ensuring traffic remains within the Oracle network" (OCI Networking Documentation, Section: Service Gateway). Using the Oracle Services Network service CIDR label for the region ensures compatibility with Object Storage endpoints, optimizing cost and security.

Requirements: HA, HTTP/HTTPS support, health checks, cost-effectiveness.

Option A: NLB with TCP is Layer 4, lacks HTTP/HTTPS features—incorrect.

Option B: Flexible Load Balancer (Application LB) supports Layer 7 HTTP/HTTPS and health checks, ideal for production—correct.

Option C: NLB with UDP is irrelevant for HTTP/HTTPS—incorrect.

Option D: Flexible LB with TCP only limits Layer 7 features—incorrect.

Conclusion: Option B meets all needs efficiently.

Oracle states:

"The Application Load Balancer (Flexible LB) supports HTTP/HTTPS with health checks, suitable for production workloads."This supports Option B. Reference:Load Balancer Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Balance/Concepts/balanceoverview.htm).

Requirements:Quick, cheap, encrypted VPN; interim before FastConnect.

VPN Options:

Static VPN:Simple, native, low cost.

Third-Party Appliance:Complex, costly.

Service Gateway:Not for VPN; incorrect.

BGP VPN:Dynamic, more setup; less quick.

Evaluate Options:

A:Static VPN is fast, secure, budget-friendly; correct.

B:Appliance adds cost and complexity; incorrect.

C:Misaligned use of Service Gateway; incorrect.

D:BGP is overkill for pilot; less efficient.

Conclusion:Static VPN via DRG is most suitable.

Static VPN is ideal for quick setups. The Oracle Networking Professional study guide notes, "A Site-to-Site VPN with static routing via DRG provides a fast, encrypted connection for short-term needs, minimizing cost and setup time" (OCI Networking Documentation, Section: Site-to-Site VPN). This fits the pilot project perfectly.

Requirement:Private, secure access to OIC from a private subnet.

Endpoint Types:

Public:Internet-based; violates policy.

Service Gateway:For OCI services like Object Storage, not OIC.

Private:VCN-internal access to services; fits OIC.

Regional:Ambiguous, not specific; incorrect.

Evaluate Options:

A:Public internet; incorrect.

B:Wrong service target; incorrect.

C:Private within VCN; correct.

D:Undefined scope; incorrect.

Conclusion:Private Endpoint ensures secure connectivity.

Private Endpoints secure OIC access. The Oracle Networking Professional study guide notes, "A Private Endpoint allows applications in a private subnet to access Oracle Integration Cloud (OIC) within the OCI network, avoiding public internet exposure" (OCI Networking Documentation, Section: Private Endpoints). This meets the security policy directly.