Get Oracle 1Z0-1124-25 Exam Practice Questions - Real and Updated

Answer : C

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

Concern: IPSec overhead reduces effective MTU.

MTU Impact: Must avoid fragmentation, which degrades performance.

Evaluate Factors:

A: Bandwidth doesn't dictate MTU; incorrect.

B: Smallest MTU in path (path MTU) prevents fragmentation; most critical.

C: Ethernet MTU is a factor but not the limiting one; incomplete.

D: DRG fragmentation settings are secondary to path MTU; incorrect.

Conclusion: Path MTU is the key determinant to avoid fragmentation.

IPSec reduces MTU due to headers. The Oracle Networking Professional study guide explains, 'When configuring IPSec over FastConnect, the most important factor is the smallest MTU supported along the entire path to prevent fragmentation and ensure efficient traffic flow' (OCI Networking Documentation, Section: IPSec over FastConnect). Path MTU discovery is critical.

Answer : B

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.

Answer : B

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.

Answer : C

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).