Important Oracle 1Z0-1124-25 Exam Questions

Answer: B

Explanation:

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).

Answer: C

Explanation:

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.

Answer: C

Explanation:

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.

Answer: B

Explanation:

Objective: Identify essential info for CPE to establish a Site-to-Site VPN with OCI.

Option A: Region and availability domain are for OCI resource placement, not CPE config---incorrect.

Option B: The DRG's public IP is the VPN endpoint, and the IKE pre-shared key authenticates the tunnel---essential and correct.

Option C: OCID and compartment ID are for OCI management, not CPE setup---incorrect.

Option D: Subnet CIDRs are for routing, configured later, not for tunnel establishment---incorrect.

Conclusion: Option B provides the critical VPN connection details.

Oracle documentation states:

'To configure your CPE for Site-to-Site VPN, you need the public IP address of the DRG (VPN headend) and the IKE pre-shared key from the OCI console.'

This confirms Option B. Reference: Setting Up IPSec VPN - Oracle Help Center (docs.oracle.com/en-us/iaas/Content/Network/Tasks/settingupIPSec.htm).

Answer: A

Explanation:

Goal: Prefer FastConnect routes over public internet in OCI.

BGP Attributes:

Local Preference: Higher value prefers a path within an AS.

AS Path: Shorter path preferred, but manipulated on sender side.

Prefix Length: More specific wins, but not controllable here.

MED: Influences inbound traffic, not OCI preference.

Evaluate Options:

A: Higher Local Preference ensures FastConnect priority; correct.

B: AS Path is set by on-premises, not OCI; incorrect.

C: Prefix specificity is on-premises controlled; incorrect.

D: MED affects on-premises, not OCI; incorrect.

Conclusion: Local Preference is the right attribute.

Local Preference controls route preference in BGP. The Oracle Networking Professional study guide states, 'To prioritize FastConnect routes in OCI, increase the Local Preference for routes learned via the FastConnect virtual circuit over other paths' (OCI Networking Documentation, Section: BGP Configuration). This ensures OCI prefers the private path.