Oracle 1Z0-1124-25 Exam Dumps

Objective: Enable transitive routing via a network appliance (e.g., firewall) between VCNs.

Transitive Routing Setup: DRG connects VCNs; appliance processes traffic.

Key Requirement: DRG must route traffic to the appliance's private IP.

Evaluate Options:

A: Service Gateway is for OCI services, not transitive routing; incorrect.

B: Static routes on DRG to appliance ensure correct traffic flow; essential.

C: Load Balancer is optional, not essential for routing; incorrect.

D: LPG is for intra-region VCN peering, not appliance-DRG connection; incorrect.

Conclusion: DRG static routes to the appliance are critical for transitive routing.

Transitive routing with a network appliance requires explicit routing configuration. The Oracle Networking Professional study guide notes, 'To enable transitive routing through a network appliance, configure static routes in the DRG route table pointing to the appliance's private IP as the next hop' (OCI Networking Documentation, Section: Transitive Routing with DRG). This ensures traffic is processed by the appliance between VCNs.

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.

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: HA and redundancy for on-premises-to-OCI connectivity.

Option A: Single FastConnect lacks redundancy---incorrect.

Option B: Single VPN over internet has no redundancy and poor performance---incorrect.

Option C: Dual FastConnect with diverse paths ensures HA and redundancy via separate routes---correct.

Option D: Internet Gateway with public IPs isn't dedicated or redundant---incorrect.

Conclusion: Option C is the recommended approach.

Oracle advises:

'For high availability, use dual FastConnect connections with diverse paths to eliminate single points of failure in hybrid connectivity.'

This supports Option C. Reference: FastConnect High Availability - Oracle Help Center (docs.oracle.com/en-us/iaas/Content/Network/Tasks/fastconnect.htm#ha).

Problem: OKE web tier pods cannot reach the application tier.

Traffic Flow: Web tier (OKE) initiates outbound (egress) traffic to application tier (port 8080).

NSG Role: Controls traffic at VNIC level; must allow egress from OKE and ingress to app tier.

Evaluate Options:

A: Missing egress rule on OKE NSG blocks traffic; plausible but incomplete context.

B: Ingress on OKE NSG affects incoming traffic, not outbound to app tier; incorrect.

C: No ingress on OKE NSG doesn't block egress to app tier; incorrect.

D: Egress limited to internet blocks app tier access (port 8080); most likely.

Conclusion: Missing egress rule to app tier NSG is the primary issue.

NSGs require explicit egress rules for outbound traffic. The Oracle Networking Professional study guide notes, 'For OKE pods to communicate with other tiers, the node pool's NSG must include egress rules to the destination NSG or CIDR on the required ports' (OCI Networking Documentation, Section: Network Security Groups with OKE). Option D reflects a common misconfiguration in IaC setups.