Oracle 1z0-1124-25 Dumps

Goal: Ensure OCI-Azure traffic during BGP disruption.

Option A: Static routes bypass BGP dependency, maintaining connectivity—correct.

Option B: Disabling BGP stops routing—incorrect.

Option C: Notification doesn’t ensure connectivity—incorrect.

Option D: Keepalive timers delay detection, not prevent disruption—incorrect.

Conclusion: Option A is most critical.

Oracle notes:

"For uninterrupted OCI-Azure Interconnect traffic during BGP maintenance, configure static routes between VCNs and VNets."This supports Option A. Reference:OCI-Azure Interconnect - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/ociazureinterconnect.htm).

Goal: Restrict subnet traffic to a specific on-premises IP range via FastConnect.

Option A: Internet Gateway is for public access, not FastConnect—incorrect.

Option B: Default security list applies broadly, lacking granularity; NSGs are more effective—less optimal.

Option C: Custom route table with DRG ensures FastConnect routing; NSGs provide precise, instance-level traffic restriction—correct.

Option D: LPG is for same-region VCN peering, not on-premises—incorrect.

Conclusion: Option C is the most effective method.

Oracle notes:

"Use a custom route table with a DRG route rule for FastConnect traffic. NSGs offer granular control to restrict traffic to specific IP ranges."This supports Option C. Reference:FastConnect and NSG Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/fastconnect.htm & docs.oracle.com/en-us/iaas/Content/Network/Concepts/NSGs.htm).

Objective: Identify the OCI component for dynamic routing in a hybrid setup.

Option A: Internet Gateway enables public internet access, not private hybrid routing—incorrect.

Option B: DRG is a virtual router that dynamically routes traffic between on-premises networks and VCNs via FastConnect or VPN, using protocols like BGP—correct.

Option C: Service Gateway provides private access to OCI services, not on-premises connectivity—incorrect.

Option D: LPG peers VCNs within the same region, not with on-premises—incorrect.

Conclusion: DRG is essential for hybrid dynamic routing.

Oracle documentation confirms:

"The Dynamic Routing Gateway (DRG) enables dynamic routing between your on-premises network and VCNs, supporting hybrid cloud connectivity via FastConnect or VPN."This validates Option B. Reference:Dynamic Routing Gateway Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/managingDRGs.htm).

Problem: OKE pods can’t resolve private DB IP despite VCN DNS working.

Option A: CoreDNS in OKE must forward to VCN’s resolver for private IPs; misconfiguration is a common issue—correct.

Option B: Security lists block traffic, not resolution; VCN DNS isn’t hosted on the DB—incorrect.

Option C: Public endpoint affects API access, not internal DNS—incorrect.

Option D: Route tables don’t control DNS resolution—incorrect.

Conclusion: Option A is the most probable cause.

Oracle notes:

"CoreDNS in OKE must be configured to forward queries to the VCN’s DNS resolver (.169 address) for private IP resolution."This supports Option A. Reference:OKE DNS Configuration - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/ContEng/Tasks/contengdns.htm).

Objective: Identify the true statement about KSK rotation in OCI DNS.

Option A: OCI DNS automates much of the process but requires user initiation, not fully automated—incorrect.

Option B: OCI DNS generates keys internally; manual generation and upload aren’t required—incorrect.

Option C: OCI DNS offers a “KSK Rollover” feature that, once enabled, automates the rotation process, ensuring minimal disruption—correct.

Option D: KSK rotation is supported via the rollover feature—incorrect.

Conclusion: Option C accurately describes OCI DNS KSK rotation.

Oracle documentation confirms:

"OCI DNS supports KSK rotation through the KSK Rollover feature. Enable it to automatically rotate keys while maintaining DNS resolution continuity."This validates Option C. Reference:DNSSEC in OCI DNS - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/DNS/Tasks/managingdnssec.htm).

Problem:VPN instability during peak hours due to latency and packet loss.

Evaluate Actions:

A:Optimizing IKE/IPSec reduces overhead; improves stability.

B:QoS prioritizes VPN traffic; enhances reliability.

C:Increasing MTU may worsen fragmentation if path MTU isn’t matched; least effective.

D:Dedicated interconnect eliminates internet issues; most effective.

MTU Insight:Raising MTU without path MTU discovery risks more fragmentation, not less.

Conclusion:Increasing MTU is least likely to help.

VPN stability requires addressing network conditions. The Oracle Networking Professional study guide notes, "Adjusting IKE/IPSec parameters or using QoS can stabilize VPN tunnels, while increasing MTU without path MTU alignment may exacerbate fragmentation" (OCI Networking Documentation, Section: VPN Troubleshooting). Dedicated interconnects are ideal, but MTU adjustment is risky here.

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.

Identify the Goal: Troubleshoot efficiently to determine if stateful inspection is causing intermittent connectivity issues.

Option A Evaluation: Disabling stateful inspection globally removes all security checks, potentially restoring connectivity but disrupting the entire VCN’s security. This is inefficient and risky.

Option B Evaluation: Creating a bypass rule for the application server avoids inspection, which could confirm the issue but weakens security for that server. It’s a workaround, not a diagnostic step, and requires policy changes during troubleshooting.

Option C Evaluation: Reviewing firewall logs for denied traffic is targeted and non-disruptive. Logs show if stateful inspection is dropping packets (e.g., due to session timeouts or rule mismatches), directly identifying the cause without altering configurations.

Option D Evaluation: Recreating the firewall is highly disruptive, time-consuming, and doesn’t guarantee insight into the current issue. It’s not a troubleshooting step.

Conclusion: Option C is the most efficient, as it leverages logs for precise diagnosis without impacting operations.

Per Oracle’s Network Firewall documentation:

"Network Firewall logs provide detailed information about allowed and denied traffic, including source/destination IPs, ports, and protocols. Use logs to troubleshoot connectivity issues by identifying dropped packets due to stateful inspection or rule mismatches."

"Stateful inspection tracks connection states; misconfigurations can lead to dropped sessions."This confirms logs are the best tool for diagnosing stateful inspection issues. Reference:Network Firewall Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/NetworkFirewall/overview.htm).

Problem:Private subnet instances can’t access Object Storage via Service Gateway.

Setup Check:Route rules point to Service Gateway; NSGs allow traffic.

Evaluate Causes:

A:Incorrect CIDR labels block Object Storage access; likely.

B:Internet Gateway irrelevant for Service Gateway; incorrect.

C:NSGs confirmed open, security lists secondary; less likely.

D:NAT Gateway not used here; incorrect.

Conclusion:Misconfigured Service Gateway CIDR is the most likely issue.

Service Gateway requires specific CIDR labels. The Oracle Networking Professional study guide states, "For private subnets to access Object Storage via a Service Gateway, the gateway must be configured with the correct regional Oracle Services CIDR label" (OCI Networking Documentation, Section: Service Gateway Configuration). Misconfiguration prevents access despite proper routing.

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.

Requirements: App tier only initiates to DB; web tier to app tier only.

Option A: NSGs with forced routing through app tier adds complexity and latency—less effective.

Option B: Single NSG lacks subnet-level isolation—incorrect.

Option C: Separate security lists per subnet with ingress/egress rules enforce isolation; route tables ensure proper VCN routing—correct and effective.

Option D: Security lists are good, but routing web-to-DB via app tier is unnecessary—incorrect.

Conclusion: Option C achieves isolation efficiently.

Oracle states:

"Use separate security lists per subnet with ingress/egress rules to isolate tiers. Route tables manage intra-VCN traffic without forced hops."This supports Option C. Reference:Security Lists Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/securitylists.htm).

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.

Objective:Efficiently propagate on-premises route updates to multiple VCNs.

DRG Capabilities:Supports route distribution to attached VCNs.

Analyze Options:

A:Manual updates are inefficient and error-prone; unsuitable.

B:Centralized DRG with route distribution automates propagation; efficient.

C:Multiple DRGs add complexity and manual effort; inefficient.

D:Service Gateway is for OCI services, not route updates; incorrect.

Conclusion:Centralized DRG with route distribution is the most efficient method.

Route distribution in a DRG simplifies multi-region routing. The Oracle Networking Professional study guide notes, "Using a centralized DRG with route distribution enabled allows routes learned from on-premises networks to be automatically propagated to all attached VCNs, reducing management overhead" (OCI Networking Documentation, Section: DRG Route Distribution). This leverages OCI’s automation capabilities.

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).

Goal: Balance global load balancing with regional WAF protection near users.

Option A: Single WAF in one region creates a bottleneck and increases latency—insufficient.

Option B: GLB distributes globally to regional Load Balancers, each with a WAF, ensuringprotection close to users—correct.

Option C: WAF before GLB centralizes protection, adding latency and a single failure point—incorrect.

Option D: Source IP routing with regional WAFs is less optimal than GLB’s health-based routing—less effective.

Conclusion: Option B optimizes both goals.

Oracle states:

"OCI GLB distributes traffic across regions. Pair with regional Load Balancers and WAFs for localized protection and optimal performance."This supports Option B. Reference:Global Load Balancer Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Balance/Concepts/globalbalance.htm).

Requirement:Transitive routing across regions and to on-premises, privately.

Components:

LPG:Intra-region VCN peering; limited scope.

DRG:Cross-region and on-premises routing via private backbone.

Service Gateway:OCI service access; not transitive.

Internet Gateway:Public internet; not private.

Evaluate Options:

A:Region-specific; incorrect.

B:Supports multi-region and on-premises; correct.

C:Service-focused; incorrect.

D:Public; incorrect.

Conclusion:DRG is the key component.

DRG enables complex routing scenarios. The Oracle Networking Professional study guide notes, "The Dynamic Routing Gateway (DRG) facilitates transitive routing between VCNs in different regions and on-premises networks over OCI’s private backbone" (OCI Networking Documentation, Section: Dynamic Routing Gateway). This meets both requirements efficiently.

Goal: Ensure optimal performance in connectivity strategy.

Option A: Low setup cost may compromise performance—incorrect.

Option B: Proximity affects latency; ignoring it harms performance—incorrect.

Option C: Matching bandwidth to app needs ensures performance—correct.

Option D: Limiting to managed solutions restricts options—incorrect.

Conclusion: Option C is the key consideration.

Oracle advises:

"Consider application bandwidth requirements and peak loads when selecting a connectivity strategy for optimal performance during migration.”This supports Option C. Reference:Network Planning for Migration - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/migration.htm#planning).

Problem:DNSSEC validation fails post-setup.

DNSSEC Chain:Requires DS record in parent zone for trust.

Evaluate Causes:

A:Low TTL affects caching, not validation; unlikely.

B:Missing DS in parent zone breaks chain; most likely.

C:Resolver config is client-side, not affecting external tools; incorrect.

D:OCI uses standard algorithms; highly unlikely.

Conclusion:Registrar delay in publishing DS is the primary cause.

DNSSEC relies on the parent zone. The Oracle Networking Professional study guide explains, "DNSSEC validation fails if the registrar hasn’t published the DS record in the parent zone, as this breaks the chain of trust" (OCI Networking Documentation, Section: DNSSEC Troubleshooting). This is a common post-enablement issue.

Requirements: Secure, reliable, low-latency, bidirectional access with redundancy.

Option A: VPN via DRG is secure but lacks low latency and redundancy—insufficient.

Option B: FastConnect via DRG offers low latency and security but no redundancy—partial fit.

Option C: Public endpoints are insecure and high-latency—incorrect.

Option D: FastConnect for primary low-latency access, VPN as backup for redundancy—correct and most appropriate.

Conclusion: Option D meets all criteria.

Oracle states:

"FastConnect with DRG provides secure, low-latency hybrid connectivity. Add a Site-to-Site VPN for redundancy to ensure reliability."This supports Option D. Reference:Hybrid Cloud Connectivity - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/hybridcloud.htm).

Context: Zero Trust assumes no trust, requiring strict isolation (micro-segmentation).

Option A: Bandwidth isn’t increased by segmentation—incorrect.

Option B: Segmentation may increase route tables for granularity, not reduce them—incorrect.

Option C: Micro-segmentation isolates workloads, limiting breach impact (blast radius)—core Zero Trust goal and correct.

Option D: Inter-region connectivity isn’t simplified by micro-segmentation—incorrect.

Conclusion: Option C aligns with Zero Trust principles.

Oracle notes:

"Micro-segmentation in OCI VCNs, using NSGs and security lists, limits the blast radius of breaches by isolating resources, a key Zero Trust principle."This supports Option C. Reference:Zero Trust in OCI - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/zerotrust.htm).

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.

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).

Needs: Secure, reliable hybrid multicloud access.

Option A: Multiple VPNs are secure but complex and less reliable over internet—less optimal.

Option B: Public internet with app security is insecure—incorrect.

Option C: FastConnect to OCI provides a private base; SD-WAN extends securely to AWS/Azure with encryption and HA—correct.

Option D: FastConnect to OCI with VPNs to others risks OCI as a single point of failure—less reliable.

Conclusion: Option C is the most secure and reliable.

Oracle advises:

"For hybrid multicloud, use FastConnect for primary connectivity and SD-WAN to extend securely to other clouds with encryption and policy control."This supports Option C. Reference:Multicloud Best Practices - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/multicloud.htm#bestpractices).

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).

Requirement:Centralized logging of Network Firewall traffic for analysis.

OCI Services:

Audit Service:Logs API calls, not network traffic.

Logging Analytics:Analyzes logs but needs log ingestion.

Service Connector Hub with Logging:Moves firewall logs to OCI Logging.

Cloud Guard:Monitors security posture, not detailed logging.

Evaluate Options:

A:Audit Service is for API events; incorrect.

B:Logging Analytics requires log source; incomplete.

C:Service Connector Hub with Logging captures and stores firewall logs; best fit.

D:Cloud Guard is for threat detection, not logging; incorrect.

Conclusion:Service Connector Hub with OCI Logging meets the requirement.

OCI Network Firewall logs require integration with OCI Logging. The Oracle Networking Professional study guide states, "Service Connector Hub can be configured to transfer Network Firewall logs to OCI Logging for centralized storage and analysis, meeting auditing requirements" (OCI Networking Documentation, Section: Network Firewall Logging). This ensures every session is logged and auditable.

Objective: Reduce latency for remote users accessing private resources via Bastion.

Option A: Single Bastion increases latency for distant users—incorrect.

Option B: Multiple regional Bastions minimize latency by proximity—correct.

Option C: Dynamic port forwarding doesn’t address geographic latency—incorrect.

Option D: Load balancer aids HA, not latency reduction—incorrect.

Conclusion: Option B optimizes latency.

Oracle notes:

"Deploy Bastion hosts in multiple regions to reduce latency for geographically dispersed users accessing private resources."This supports Option B. Reference:Bastion Service Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Bastion/Concepts/bastionoverview.htm).

Problem: App tier can’t reach DB tier despite open security lists.

Option A: Flow Logs show traffic details but require analysis, slowing diagnosis—less efficient.

Option B: Connection Diagnostics tests connectivity (e.g., ping, traceroute) between resources, quickly pinpointing failures—correct.

Option C: Network Firewall controls traffic, not diagnoses—incorrect.

Option D: Bastion is for access, not troubleshooting—incorrect.

Conclusion: Connection Diagnostics is the best tool for quick isolation.

Oracle states:

"Connection Diagnostics provides rapid testing of network connectivity between OCI resources, ideal for isolating issues like tier-to-tier failures.”This validates Option B. Reference:Network Troubleshooting - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/troubleshooting.htm#connectiondiagnostics).

Requirements:Isolated segments, efficient IP use, easy management.

Options Analysis:

A:Separate VCNs waste IPs, high overhead; inefficient.

B:Subnets with NSGs optimize IP use, simplify control; correct.

C:Compartments are for IAM, not network isolation; incorrect.

D:VM firewalls are complex, less secure; unsuitable.

Conclusion:Subnets with NSGs are most efficient.

Subnets and NSGs provide tenant isolation. The Oracle Networking Professional study guide states, "For multi-tenant applications, use separate private subnets within a VCN and enforce isolation with NSGs and routing rules, optimizing IP utilization and management" (OCI Networking Documentation, Section: VCN Design). This balances security and efficiency.

Problem Context: BGP session is established, but no routes are exchanged, and basic config (ASNs, IPs) is correct.

Option A Analysis: Misconfigured keepalive timers would cause the session to drop intermittently. Since the session is confirmed as established, this is unlikely. Keepalives affect session stability, not route exchange.

Option B Analysis: A mismatch in BGP authentication keys (e.g., MD5 passwords) would prevent the session from establishing. Given the session is up, this is not the issue.

Option C Analysis: BGP prefix lists or route maps filter advertised routes. If either the on-premises router or OCI applies a filter (intentionally or misconfigured), it could block route advertisements despite an established session. This is a common issue in BGP setups and aligns with the symptoms.

Option D Analysis: MTU mismatches could cause packet loss or fragmentation, but BGP uses TCP (small packets), and session establishment indicates MTU isn’t the primary issue. Route exchange failures are more likely due to filtering than MTU.

Conclusion: Option C is the most likely cause, as filtering directly prevents route exchange without affecting session status.

From Oracle’s FastConnect documentation:

"Once a BGP session is established, routes are exchanged based on the prefixes advertised by each side. Route maps, prefix lists, or filters on either the CPE or OCI side can restrict which routes are advertised or accepted."

"If no routes appear in the routing table despite an active session, verify that no filters are blocking advertisements."This supports Option C as the most likely cause. Reference:FastConnect Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/fastconnect.htm).

Goal:Stable endpoint for MySQL DB with HA failover support.

Endpoint Options:

Public IP:Exposed, changes on failover; unsuitable.

DNS with Floating IP:Persistent across failovers; ideal.

Private IP:Tied to primary, fails on switch; incorrect.

Service Gateway:For OCI services, not MySQL DB; incorrect.

Evaluate Options:

A:Public exposure, no HA; incorrect.

B:Floating private IP with DNS ensures continuity; correct.

C:Static IP breaks on failover; incorrect.

D:Misaligned purpose; incorrect.

Conclusion:DNS with floating IP is most suitable.

MySQL DB in OCI uses floating IPs for HA. The Oracle Networking Professional study guide explains, "A DNS hostname resolving to the floating private IP of the active MySQL Database Service instance ensures seamless connectivity during failover events" (OCI Networking Documentation, Section: MySQL Database Service HA). This provides predictability and stability.

Objective: Block all outbound internet traffic from a private subnet, ensuring compliance despite misconfigurations.

Option A: ALLOW to 0.0.0.0/0 permits all traffic, contradicting the requirement.

Option B: DROP to NAT Gateway IP only blocks traffic to the NAT Gateway, not all internet traffic (e.g., misconfigured routes bypassing NAT).

Option C: REJECT to 0.0.0.0/0 blocks all outbound traffic to any IP, sending an ICMP unreachable message. This ensures no internet access, even if misconfigured, and aids troubleshooting.

Option D: ALLOW to Service Gateway permits OCI service access, not internet blocking.

Conclusion: Option C is the most comprehensive and compliant solution.

Oracle’s Network Firewall guide states:

"Use REJECT with a destination of 0.0.0.0/0 to block all outbound traffic and notify the source, ideal for strict egress control."This matches Option C’s purpose. Reference:Network Firewall Policies - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/NetworkFirewall/Tasks/managingpolicies.htm).

Objective: Identify the essential Service Connector Hub task for routing Flow Logs to Object Storage.

Option A (Ingest Logs): Ingesting is for bringing external logs into OCI, but Flow Logs are already OCI-native—incorrect.

Option B (Process Logs): “Process Logs” isn’t a specific task type in Service Connector Hub—incorrect.

Option C (Deliver Logs): Deliver Logs moves logs to a target (e.g., Object Storage), ensuring storage—correct and essential.

Option D (Transform Logs): Transforming modifies logs optionally, but delivery is required for storage—incorrect as the primary task.

Conclusion: Deliver Logs is the essential task type for this scenario.

Oracle documentation states:

"The Deliver Logs task in Service Connector Hub moves logs, such as VCN Flow Logs, to a specified destination like Object Storage for storage and analysis."This supports Option C. Reference:Service Connector Hub Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/ServiceConnectorHub/Concepts/serviceconnectorhub.htm).

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 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: Improve OCI-AWS data transfer performance.

Option A: Region distance affects latency—valid.

Option B: Dedicated interconnect boosts bandwidth and stability—valid.

Option C: Compute pricing doesn’t influence inter-cloud bandwidth—invalid.

Option D: WAN optimization can enhance transfer efficiency—valid.

Conclusion: Option C is not a design consideration for performance.

Oracle notes:

"To optimize OCI-AWS connectivity, consider region proximity, dedicated interconnects, or WAN optimization. Compute pricing is unrelated to network performance."This excludes Option C. Reference:Hybrid Cloud Networking - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/hybridcloud.htm).

Requirement:Private VCN connection across tenancies.

Services:

Internet Gateway:Public access; incorrect.

Service Gateway:OCI services, not VCNs; incorrect.

RPC:Cross-tenancy private peering; correct.

DRG with LPG:LPG is intra-region, not cross-tenancy; incorrect.

Evaluate Options:

A:Public; incorrect.

B:Service-focused; incorrect.

C:Designed for this scenario; correct.

D:Misaligned components; incorrect.

Conclusion:RPC is the right service.

RPC enables cross-tenancy peering. The Oracle Networking Professional study guide notes, "Remote Peering Connections (RPCs) establish private connectivity between VCNs in different tenancies over OCI’s private backbone" (OCI Networking Documentation, Section: Remote Peering Connections). This ensures no public internet traversal.