1z0-1124-25 Exam Dumps - Oracle Cloud Infrastructure Questions and Answers

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).

Context: Zero Trust requires strict access control.

Option A: IAM policies are still required—incorrect.

Option B: Private endpoints limit access to specific service instances, aligning with Zero Trust—correct.

Option C: Ports are controlled by NSGs/security lists—incorrect.

Option D: Private endpoints are for private access, not internet—incorrect.

Conclusion: Option B enhances security.

Oracle states:

"Private endpoints restrict access to specific OCI service instances, enhancing Zero Trust by limiting exposure compared to Service Gateways."This supports Option B. Reference:Private Endpoints - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/privateendpoints.htm).

Analyze Connectivity Successes:Instance A can ping its subnet gateway (10.0.1.1), indicating that local subnet routing and security rules are functioning for IPv4. It can also ping Instance B’s IPv6 address (fc00:1:2::20), confirming that IPv6 routing and security rules between subnets are operational.

Identify the Failure:Instance A cannot ping Instance B’s IPv4 address (10.0.2.20). Since security lists and NSGs allow all traffic, the issue is unlikely to be a security configuration problem.

Examine Routing for Instance A:The route table for Instance A’s subnet (10.0.1.0/24) has a rule directing traffic to 10.0.2.0/24 via the VCN Local Peering Gateway (LPG). In OCI, LPGs are used for intra-region VCN peering, but here, both instances are in the same VCN, so this rule is likely a misconfiguration or irrelevant unless peering is involved. However, the successful IPv6 ping suggests basic connectivity exists.

Check Return Path from Instance B:For a ping to succeed, Instance B must send ICMP replies back to Instance A (10.0.1.10). Instance B’s subnet (10.0.2.0/24) needs a route table entry to send traffic to 10.0.1.0/24. Without this, replies are dropped, causing the IPv4 ping to fail. The IPv6 success indicates that IPv6 routing is correctly configured both ways, possibly via SLAAC or default routes.

Evaluate Options:

A:Incorrect. IPv6 is enabled, as Instance A pings Instance B’s IPv6 address.

B:Correct. Missing route for 10.0.1.0/24 in Instance B’s subnet prevents IPv4 replies.

C:Incorrect. Security lists and NSGs can filter IPv6 traffic in OCI.

D:Incorrect. Ping supports IPv6, as evidenced by the successful IPv6 ping.

The most probable cause is a missing route in Instance B’s subnet route table. In OCI, each subnet has its own route table, and for instances in different subnets within the same VCN to communicate, both subnets must have appropriate routes. The successful IPv6 ping suggests that IPv6 routing is intact (likely due to default behavior or SLAAC), but IPv4 requires explicit routing. Per the Oracle Networking Professional study guide, "Route tables must be configured to direct traffic to the appropriate next hop for inter-subnet communication within a VCN" (OCI Networking Documentation, Section: Virtual Cloud Networks).

Goal:Protect web servers from SQL injection using Network Firewall.

Firewall Features:

Stateful Inspection:Basic traffic tracking, limited exploit detection.

IDPS:Detects and prevents exploits via signatures.

URL Filtering:Blocks URLs, not payload-based attacks.

Geo-location:Blocks regions, not specific threats.

Evaluate Options:

A:Default IPS lacks SQL injection specificity; insufficient.

B:IDPS with custom signatures targets SQL injection; most suitable.

C:URL Filtering doesn’t address SQL injection payloads; incorrect.

D:Geo-location is broad, not precise; ineffective.

Conclusion:IDPS with custom rules is the best feature.

IDPS in OCI Network Firewall is designed for exploit prevention. The Oracle Networking Professional study guide explains, "The Intrusion Detection and Prevention System (IDPS) uses signatures to detect and block specific threats like SQL injection, with custom rule sets for tailored protection" (OCI Networking Documentation, Section: Network Firewall IDPS). This ensures precise defense against web exploits.

Requirements:Private, encrypted connectivity to on-premises, no public internet.

Gateway Options:

Service Gateway:For OCI services, not on-premises.

Internet Gateway:Public internet access, unsuitable.

DRG with FastConnect:Private on-premises connectivity.

NAT Gateway:Outbound internet, not private to on-premises.

Evaluate Options:

A:Limited to OCI services; incorrect.

B:Uses public internet; violates policy.

C:FastConnect via DRG ensures private, encrypted link; correct.

D:Public IPs contradict requirement; incorrect.

Conclusion:DRG with FastConnect is the most appropriate.

FastConnect provides private connectivity via DRG. The Oracle Networking Professional study guide states, "A Dynamic Routing Gateway with FastConnect establishes a dedicated, private connection to on-premises networks, ensuring data encryption and isolation from the public internet" (OCI Networking Documentation, Section: FastConnect). This meets security and privacy needs.

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.

Goal:Minimize maintenance of Bastion session configurations.

Bastion Options:

Individual Sessions:High maintenance per instance.

Dynamic Port Forwarding:Flexible but user-managed, prone to errors.

Centralized Service:Predefined targets, low maintenance.

Separate Hosts:Increases complexity and overhead.

Evaluate Options:

A:Per-instance sessions require constant updates; inefficient.

B:SOCKS5 shifts burden to users; moderate maintenance.

C:Centralized with managed sessions reduces effort; optimal.

D:Multiple hosts multiply management tasks; worst option.

Conclusion:Centralized Bastion with managed sessions is most efficient.

OCI Bastion service supports centralized management. The Oracle Networking Professional study guide notes, "A centralized Bastion service with managed sessions and predefined target configurations minimizes administrative overhead by streamlining access to private subnet resources" (OCI Networking Documentation, Section: Bastion Service). This approach leverages OCI’s automation capabilities.

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).

Requirements: HA and IPv6 support for public web app.

Option A: ULA is private, not routable; NAT for IPv6 is inefficient—incorrect.

Option B: ULA doesn’t support public IPv6 clients—incorrect.

Option C: Public IPv6 CIDR is correct, but IPv4-only LB with NAT lacks direct IPv6—less resilient.

Option D: Public IPv6 CIDR with dual-stack LB and instances ensures full IPv6 support and HA across ADs—correct.

Conclusion: Option D maximizes resilience and connectivity.

Oracle states:

"For public IPv6 applications, use a public IPv6 CIDR block and configure Load Balancers and instances for both IPv4 and IPv6 to ensure resilience."This supports Option D. Reference:IPv6 in OCI - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/managingIPv6.htm).

Requirement: OCI-AWS traffic must stay in the US for sovereignty compliance.

Option A: A FastConnect partner guaranteeing US-only transit ensures compliance via a private, controlled path—correct.

Option B: DRG and VGW with VPN don’t guarantee US-only routing over public internet—incorrect.

Option C: Generic VPN can’t control internet paths despite US gateways—incorrect.

Option D: Public internet with DNS restrictions doesn’t enforce routing—incorrect.

Conclusion: Option A is the most critical consideration.

Oracle states:

"Choose a FastConnect partner that can guarantee geographic routing constraints, such as US-only transit, to meet data sovereignty requirements."This supports Option A. Reference:FastConnect Compliance - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/fastconnect.htm#compliance).