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Questions # 1:

Your company is migrating its publicly accessible website to OCI. You want to ensure the highest level of security and prevent DNS spoofing or cache poisoning attacks. You've decided to implement DNSSEC. Which of the following is the most important first step in enabling DNSSEC for your domain using OCI DNS?

Options:

Create a Traffic Management Steering Policy with the "DNSSEC" option enabled.

Generate a Key Signing Key (KSK) and a Zone Signing Key (ZSK) using a third-party tool and upload them to OCI DNS.

Enable DNSSEC on the OCI DNS zone for your domain and obtain the Delegation Signer (DS) record from OCI DNS.

Configure the OCI DNS resolver to validate all incoming DNS responses using DNSSEC.

Questions # 2:

You are a Cloud Architect troubleshooting connectivity issues in your OCI environment. Your application servers, residing in private subnets within a VCN, need to access Object Storage within the same region to retrieve critical data. You have confirmed that there are no NSG rules blocking traffic between the subnets. However, the instances cannot access Object Storage. You have a Service Gateway configured, and route rules in the private subnets directing traffic for Oracle Services to the Service Gateway. What is the most likely cause of this issue?

Options:

The Service Gateway is not configured with the correct service CIDR labels for Object Storage in the region.

The Internet Gateway is disabled.

The security list associated with the private subnet does not allow outbound traffic to all Oracle Services.

The NAT Gateway is not configured correctly to access external services.

Questions # 3:

You're automating the creation of multiple VCNs across different OCI regions using Cloud Shell scripting. Which authentication method within Cloud Shell is best suited to programmatically authenticate with OCI, ensuring both security and scalability for this automation task?

Options:

Using the default Cloud Shell user and configuring the OCI CLI with API keys in a shell script.

Creating a dedicated IAM user for automation, generating API keys, storing the keys securely in Cloud Shell’s persistent storage, and using them in the scripts.

Leverage Instance Principals in conjunction with a dynamic group that includes your Cloud Shell session.

Using Resource Manager stack with Terraform to provision network resources including cross-region configurations, leveraging OCI Vault to handle the sensitive credentials used in Terraform scripts.

Questions # 4:

You are designing a multi-tier application in OCI, deploying the application tier in a public subnet and the database tier in a private subnet within the same VCN. The application tier requires access to specific external internet resources for software updates and third-party API calls. However, the database tier should not have direct internet access. Which of the following is the most secure and efficient method to achieve this configuration?

Options:

Configure a NAT Gateway for the private subnet and a Service Gateway for the public subnet.

Configure a NAT Gateway for both the public and private subnets.

Configure a NAT Gateway for the public subnet and a Service Gateway for the private subnet.

Configure a NAT Gateway for the private subnet and an Internet Gateway for the public subnet.

Questions # 5:

Your organization requires that all backups of critical application data stored in OCI Object Storage from an instance within a private subnet must remain within the Oracle Cloud Infrastructure network and not traverse the public internet. Which OCI networking component should you configure to enable this secure and private access to Object Storage?

Options:

Internet Gateway

NAT Gateway

Service Gateway

Network Firewall

Questions # 6:

You are designing a microservices-based application on OCI. Each microservice is deployed as a container in Oracle Container Engine for Kubernetes (OKE). You want to expose these microservices through a single entry point using a Layer 7 load balancer and route traffic based on the request path. Which OCI load balancing integration method with OKE is the MOST appropriate and efficient?

Options:

Manually create a Regional Load Balancer and configure backend sets with the private IP addresses of the Kubernetes worker nodes hosting the microservices.

Deploy a Kubernetes LoadBalancer service, which automatically provisions an OCI Regional Load Balancer to distribute traffic to the microservice pods.

Deploy a Kubernetes NodePort service for each microservice and configure an OCI NetworkLoad Balancer to forward traffic to the NodePort services on the worker nodes.

Deploy a Kubernetes Ingress controller that leverages an OCI Regional Load Balancer to route traffic to the microservice pods based on Ingress rules.

Questions # 7:

You’re tasked with creating a network diagnostic tool using Cloud Shell to test connectivity to various endpoints from within your VCN. To enhance security, you want to ensure the tool only has the necessary permissions to perform network diagnostics (e.g., ping, traceroute, nc). Which IAM principle and associated action(s) provide the MOST restrictive, least-privilege access for Cloud Shell to perform network diagnostic tasks?

Options:

An IAM user with the read permission on all virtual-network-family resources.

Cloud Shell session using Instance Principals, belonging to a dynamic group with a policy allowing network-security-groups and vnics to be read and used.

An IAM group with inspect permission on virtual-network-family in the target compartment.

An IAM group with the use permission on the virtual-network-family aggregate resource in the tenancy.

Questions # 8:

You are designing a highly available application that requires low latency communication between OCI regions. You have two VCNs, VCN-A in Region 1 and VCN-B in Region 2. These VCNs have non-overlapping CIDR blocks and you want to establish a private, direct connection between them for optimal performance. Which of the following steps are necessary to establish this cross-region connectivity using the native OCI networking capabilities?

Options:

Create a Remote Peering Connection (RPC) in each VCN, establish the peering, and update the route tables in each VCN to route traffic to the peer VCN’s CIDR block through the RPC.

Configure an IPSec VPN tunnel between the VCNs and update the route tables in each VCN to route traffic to the peer VCN’s CIDR block through the IPSec VPN tunnel.

Create a Service Gateway in each VCN, and configure a Dynamic Routing Gateway (DRG) toroute traffic between the Service Gateways.

Create a NAT Gateway in each VCN and configure route rules to route traffic to the other NAT Gateway’s public IP address.

Questions # 9:

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?