Free Oracle 1z0-1124-25 Practice Exam with Questions & Answers | Set: 3

Requirement: Private, IAM-secured access to Object Storage.

Option A: Public subnet with Internet Gateway uses public IPs—violates policy.

Option B: NAT Gateway is for internet access, not private OCI services—incorrect.

Option C: Service Gateway enables private access to Object Storage, paired with IAM for auth—correct.

Option D: Public subnet with firewall still relies on public IPs—incorrect.

Conclusion: Option C meets all requirements.

Oracle states:

"Use a Service Gateway for private access to OCI Object Storage from a private subnet, with IAM policies for authentication and authorization."This supports Option C. Reference:Service Gateway Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/servicegateway.htm).

Problem:Packet loss and degradation over OCI-Azure Interconnect.

Typical Causes:Security rules, routing, MTU mismatches.

Evaluate Options:

A:NSGs/Security Lists blocking traffic is a common issue; typical.

B:Routing misconfiguration can drop packets; typical.

C:Pricing tiers affect billing, not interconnect bandwidth; not typical.

D:MTU mismatches cause fragmentation and loss; typical.

Conclusion:Pricing tiers are unrelated to interconnect performance issues.

Interconnect performance issues stem from network configuration, not pricing. The Oracle Networking Professional study guide states, "Troubleshooting multi-cloud interconnects involves checking security rules, routing, and MTU settings, as these directly impact traffic flow" (OCI Networking Documentation, Section: Multi-Cloud Connectivity). Pricing tiers influence resource limits, not interconnect bandwidth.

Objective: Allow VCN-A to access on-premises (192.168.1.0/24) via VPN, isolate VCN-B using DRG route tables effectively and securely.

Option A: Single route table for both VCNs with NSGs on VCN-B to block traffic. This works but relies on NSGs, which are secondary to routing. Routing-level isolation is more secure and efficient.

Option B: Single route table for VCN-A with the VPN route, default table (no VPN route) for VCN-B. This isolates VCN-B effectively at the routing level, but managing one table across all attachments can complicate scaling.

Option C: Two route tables, both with VPN routes, then blocking VCN-B with security lists. This is inefficient—routes are advertised unnecessarily, relying on security lists instead of routing isolation.

Option D: Two route tables—DRG-RT-A with VPN route for VCN-A, DRG-RT-B with no VPN route for VCN-B. This ensures VCN-B has no path to on-premises at the DRG level, providing the strongest isolation.

Conclusion: Option D is the most effective and secure, leveraging routing for isolation rather than secondary security controls.

Oracle documentation states:

"DRG route tables control traffic between VCN attachments and external connections (e.g., VPN). Associate a unique route table with each attachment to enforce specific routing policies."

"To isolate a VCN, ensure its DRG route table contains no routes to the destination."Option D aligns with this approach. Reference:Dynamic Routing Gateway Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/managingDRGs.htm).

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.

Problem Scope:Load balancer (public subnet) cannot reach application servers (private subnet).

Connectivity Flow:Load balancer initiates traffic to application servers; application servers respond. Key checkpoints: routing and security rules.

Analyze Routing:Private subnets typically don’t route to an Internet Gateway by default; they use NAT or Service Gateways. Misrouting (Option B) would affect outbound traffic, not inbound from the load balancer.

Security Rules:

Ingress (App Servers):Must allow traffic from the load balancer’s IP range.

Egress (Load Balancer):Must allow traffic to the application servers.

Evaluate Options:

A:Missing ingress rule on application servers’ security list blocks load balancer traffic; most likely.

B:Incorrect default route affects outbound, not inbound; less likely.

C:NAT misconfiguration impacts outbound, not inbound; incorrect.

D:Load balancer egress is necessary but secondary to application server ingress.

Conclusion:Ingress rule absence on the application server subnet is the primary blocker.

Security lists control traffic at the subnet level in OCI. The Oracle Networking Professional study guide explains, "For a load balancer in a public subnet to communicate with instances in a private subnet, the private subnet’s security list must include an ingress rule allowing traffic from the load balancer’s IP range" (OCI Networking Documentation, Section: Security Lists). Since Terraform deployed the infrastructure, a misconfigured security list is a common oversight.

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).

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).

Goal: Efficient, cost-optimized data transfer minimizing egress charges.

Option A: Public internet incurs high egress costs—incorrect.

Option B: Hub-and-spoke doubles egress/ingress charges—less efficient.

Option C: Third-party platform at peering points reduces egress by leveraging direct connections—correct.

Option D: Storage Gateway is for hybrid, not multicloud efficiency—incorrect.

Conclusion: Option C is the most efficient strategy.

Oracle states:

"A third-party integration platform at peering points minimizes egress charges by using direct interconnects for multicloud data transfers.”This validates Option C. Reference:Multicloud Cost Optimization - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/multicloud.htm#costoptimization).

Objective: Identify the OCI resource for private, low-latency VCN-to-VCN connectivity in the same region.

Option A: DRG connects VCNs to external networks (e.g., on-premises) or across regions, not for same-region peering—incorrect.

Option B: LPG is designed for private peering of VCNs within the same region, ensuring low-latency communication—correct.

Option C: Internet Gateway provides public internet access, not private connectivity—incorrect.

Option D: Service Gateway connects VCNs to OCI services, not other VCNs—incorrect.

Conclusion: Option B is the appropriate resource.

Oracle documentation states:

"A Local Peering Gateway (LPG) enables private connectivity between two VCNs in the same region, providing direct, low-latency communication."This confirms Option B. Reference:Local VCN Peering Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/localVCNpeering.htm).

Goal: Balance security and performance with encryption in a VCN.

Option A: TLS only to the load balancer leaves internal traffic unencrypted, risking exposure—insufficient security.

Option B: mTLS everywhere maximizes security but adds significant overhead (e.g., certificate management), impacting performance—overkill.

Option C: NSGs/Security Lists control access but don’t encrypt traffic—lacks protection for sensitive data.

Option D: TLS between OKE and Compute secures app-tier communication. Oracle Database Vault ensures ADB traffic is encrypted efficiently, leveraging built-in features—balanced approach.

Conclusion: Option D optimizes security and performance.

Oracle states:

"Use TLS for application traffic between tiers. Autonomous Database with Database Vaultprovides encryption in transit and at rest, minimizing overhead."This supports Option D. Reference:Security in OCI Networking - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/securityoverview.htm).