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Oracle Cloud Infrastructure 2025 Networking Professional Sample Questions (Q51-Q56):
NEW QUESTION # 51
Your company is deploying a high-throughput, low-latency financial application on OCI. This application relies on raw TCP connections and requires connection persistence to maintain session state. You anticipate extremely high traffic volume and need a load balancer that can handle millions of concurrent connections with minimal overhead. You also want to use private endpoints. Which OCI load balancing option provides the most appropriate solution to meet these stringent performance and security requirements?
- A. Network Load Balancer with TCP load balancing and 5-Tuple Hash Persistence
- B. Regional Load Balancer with HTTP load balancing and Source IP Hash Persistence
- C. Regional Load Balancer with TCP load balancing and IP Hash Persistence
- D. Global Load Balancer with TCP load balancing and Cookie-based Persistence
Answer: A
Explanation:
* Requirements:High throughput, low latency, TCP, persistence, private endpoints.
* Load Balancer Options:
* ALB:Layer 7, higher overhead, HTTP-focused.
* NLB:Layer 4, low overhead, TCP/UDP optimized.
* Global LB:Global routing, not regional focus.
* Evaluate Options:
* A:ALB with IP Hash has overhead; less optimal.
* B:NLB with 5-Tuple Hash offers low latency, persistence, private support; best fit.
* C:Global LB with cookies is HTTP-based; incorrect.
* D:HTTP focus is irrelevant for raw TCP; incorrect.
* Conclusion:NLB with 5-Tuple Hash meets all criteria.
NLB is ideal for high-performance TCP. The Oracle Networking Professional study guide states, "Network Load Balancer provides low-latency, high-throughput TCP load balancing with 5-Tuple Hash persistence, supporting private endpoints for secure, high-volume applications" (OCINetworking Documentation, Section:
Network Load Balancer). This aligns with financial app needs.
NEW QUESTION # 52
You are designing a VCN in OCI to host a multi-tenant SaaS application. Each tenant requires a separate and isolated network segment for security and regulatory compliance. You are using a large CIDR block for the VCN. What is the most efficient procedural method for achieving network segmentation and isolation for each tenant, considering IP address utilization and ease of management?
- A. Create a separate compartment for each tenant and place all network resources within the tenant's compartment. Use NSGs and routing rules for isolation.
- B. Create a separate private subnet for each tenant within the same VCN, utilizing Network Security Groups (NSGs) and routing rules to enforce isolation.
- C. Create a separate virtual machine (VM) for each tenant and rely on host-based firewalls for isolation.
- D. Create a separate VCN for each tenant.
Answer: B
Explanation:
* 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.
NEW QUESTION # 53
You are designing a highly available web application in OCI. You've created a VCN with two public subnets across different Availability Domains (ADs). You need to enable IPv6 support for the application to cater to a growing number of IPv6-only clients. You plan to use a Load Balancer to distribute traffic to backend compute instances in the public subnets. Which of the following approaches ensures the highest level of resilience and IPv6 connectivity for your application?
- A. Configure the VCN with a /48 IPv6 ULA prefix. Configure the Load Balancer to listen on both IPv4 and IPv6 addresses. Ensure the backend compute instances also listen on both IPv4 and IPv6 addresses.
Route traffic accordingly using NSGs.
- B. Configure the VCN with a public IPv6 CIDR block obtained from Oracle. Configure the Load Balancer to listen on IPv4 only, while backend compute instances listen on both IPv4 and IPv6, relying on NAT for IPv6 clients.
- C. Configure the VCN with a /48 IPv6 ULA prefix. Configure the Load Balancer to listen on IPv4 only, and the compute instances to listen on both IPv4 and IPv6, relying on NAT for IPv6 clients.
- D. Configure the VCN with a public IPv6 CIDR block obtained from Oracle. Configure the Load Balancer to listen on both IPv4 and IPv6 addresses. Ensure the backend compute instances also listen on both IPv4 and IPv6 addresses.
Answer: D
NEW QUESTION # 54
Your security policy mandates that all communication between your compute instances in a private subnet and OCI Object Storage must be authenticated and authorized using IAM policies and not rely on public IP addresses. Which OCI networking feature is the most appropriate to satisfy this requirement?
- A. Private Subnet with a Service Gateway and IAM rules.
- B. Private Subnet with a NAT Gateway and IAM rules.
- C. Public Subnet with an Internet Gateway and IAM rules.
- D. Public Subnet with a Network Firewall and IAM rules.
Answer: A
Explanation:
* Requirement: Private, IAM-secured access to Object Storage.
* Option A: Public subnet with Internet Gateway uses public IPs-violates policy.
* Option B: NAT Gateway is for internet access, not private OCI services-incorrect.
* Option C: Service Gateway enables private access to Object Storage, paired with IAM for auth- correct.
* Option D: Public subnet with firewall still relies on public IPs-incorrect.
* Conclusion: Option C meets all requirements.
Oracle states:
* "Use a Service Gateway for private access to OCI Object Storage from a private subnet, with IAM policies for authentication and authorization."This supports Option C. Reference:Service Gateway Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/servicegateway.
htm).
NEW QUESTION # 55
A development team has deployed a three-tier application in an OCI VCN. The application consists of a public-facing web tier, an application tier, and a database tier. The team reports that the web tier instances can communicate with the application tier instances, but the application tier instances cannot connect to the database tier instances. All security lists are configured to allow all traffic within the VCN. Which OCI Networking diagnostic tool would BEST help you quickly isolate the root cause of this connectivity issue?
- A. VCN Flow Logs
- B. OCI Bastion
- C. Connection Diagnostics
- D. Network Firewall
Answer: C
Explanation:
* 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).
NEW QUESTION # 56
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