You are designing an OCI VCN for a new application with the following requirements: The application servers in a private subnet must be able to download software updates from public repositories on the internet; the application servers must NOT be directly accessible from the public internet; the application servers must also be able to access Oracle Cloud Infrastructure Registry (OCIR) within the same region to pull container images. Which combination of VCN Gateways BEST meets these requirements?
When setting up cross-tenancy VCN peering using Local Peering Gateways (LPGs), which IAM permission is required in the target tenancy to accept the peering request?
You are designing a solution to implement IPSec encryption over a FastConnect circuit between your on-premises network and OCI. You are concerned about the overhead of IPSec impacting themaximum MTU (Maximum Transmission Unit) size that can be supported. What is the most important factor to consider when determining the MTU size for the IPSec tunnel interfaces in this scenario?
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?
You are deploying a three-tier web application using Infrastructure as Code (IaC) and Oracle Kubernetes Engine (OKE) within a single VCN. The application consists of a public-facing web tier (running in OKE), an application tier, and a database tier. You want to ensure that only the web tier can access the application tier, and only the application tier can access the database tier. You are leveraging Network Security Groups (NSGs) for granular access control. Your IaC code successfully creates all the components, but you are experiencing connectivity issues. Specifically, Pods in the web tier cannot reach the application tier. Reviewing your IaC configuration, you realize the NSG assignments for the OKE cluster's node pool are misconfigured. Which of the following NSG configuration errors would most likely cause this connectivity issue?
In a multi-tier application architecture with separate public and private subnets, where should an OCI Bastion host be placed to provide secure access to resources in the private subnets without exposing them to the internet?
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?
You have deployed an application on OCI that uses a Regional Load Balancer with an HTTPS listener. You want to enforce end-to-end encryption and ensure that the connection between the load balancer and the backend servers is also encrypted. Which load balancer configuration step is MANDATORY to achieve this?
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?
A company has deployed a VCN in OCI with multiple subnets. Security requirements dictate that instances in different subnets within the same VCN should not be able to directly communicate with each other unless explicitly permitted. You are tasked with implementing this policy. What is the most appropriate approach to meet this requirement?
As a network security engineer, you are tasked with designing a highly secure architecture for a financial application running on OCI. You have deployed a Network Firewall to protect the application’s VCN. Due to regulatory compliance requirements, you need to ensure that no direct internet access is allowed to any compute instance within the application’s private subnet, even if it is misconfigured. You need to block all outbound traffic to the internet. Which Network Firewall rule action best accomplishes this goal?
When migrating workloads requiring high availability and redundancy for on-premises connectivity to OCI, which approach is recommended?
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?
When configuring a network appliance within a VCN to enable transitive routing, which of the following is essential to ensure traffic flows correctly between interconnected VCNs?
Your company is utilizing a multi-cloud architecture with applications running on both OCI and AWS. You have established a Site-to-Site VPN connection between OCI and AWS for secure communication. Over time, you observe that the VPN tunnel becomes unstable and frequently disconnects, particularly during peak hours. You suspect this is due to increased network latency and packet loss. Which action is least likely to improve the stability and reliability of your OCI-AWS Site-to-Site VPN connection in this scenario?
You are troubleshooting a network connectivity issue between a compute instance in a private subnet within your VCN and a service on the public internet using Cloud Shell. You suspect a problem with the network security group (NSG) rules associated with the instance's VNIC. Which Cloud Shell command and appropriate tool combination allows you to directly inspect the NSG configuration impacting the VNIC?
Which OCI service provides detailed logs for network traffic traversing a Network Load Balancer, offering insights into client connections and backend health checks?
You are managing a critical application hosted on OCI. To enhance security, you have enabled DNSSEC for your domain using OCI DNS. You want to automate the process of monitoring the health and validity of your DNSSEC configuration and receive alerts if any issues are detected. Which OCI service can be MOST effectively used for this DNSSEC monitoring purpose?
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?
You are designing a hybrid cloud environment where multiple VCNs in OCI need to communicate with your on-premises network. You are using a single Dynamic Routing Gateway (DRG) to connect to your on-premises network via FastConnect. You want to ensure that each VCN is isolated from the others and that traffic between VCNs must pass through your on-premises security appliances for inspection. How should you configure the DRG attachments and route tables to enforce this security policy?
You are responsible for managing the network infrastructure of a multi-tenant SaaS application deployed on OCI. Each tenant has their own dedicated VCN. To simplify management and provide a centralized point for connectivity to your on-premises network via FastConnect, you are using a DRG. However, you need to ensure that tenants are logically isolated from each other, and no traffic can flow directly between tenant VCNs through the DRG. How can you achieve tenant isolation while still allowing each tenant to connect to your on-premises network through the centralized DRG?
You are implementing IPSec over FastConnect to connect to a third-party network that is also connected to OCI via FastConnect. Your company requires a high level of security and isolation between your network and the third-party’s network. Which of the following is the MOST secure approach to ensure network isolation when implementing IPSec over FastConnect in this scenario?
You are working as an OCI Network Specialist. Your company is migrating its on-premises IPv6 network to OCI. As part of the migration, you need to enable communication between the on-premises network and a VCN in OCI using FastConnect. Your company utilizes global unicast IPv6 addresses on-premises and wants to continue utilizing those addresses in OCI. However, you have a restriction that compute instance traffic must be limited to IPv6 only. After assigning IPv6 addresses from the prefix to the instance, they cannot ping external IPv6 addresses. What configuration most likely addresses this issue?
In a multi-region OCI environment, which configuration is necessary to allow communication between two VCNs located in different regions through a DRG?
Your company uses OCI Certificates to manage SSL/TLS certificates for its public-facing applications. You need to implement a solution that automatically renews these certificates before they expire to avoid service disruptions. Which OCI Certificates feature or configuration best achieves this?
In a Zero Trust network architecture, what is the primary purpose of implementing micro-segmentation within OCI VCNs?
Your organization is migrating a critical three-tier application to OCI. The application requires a highly available and performant database tier. You plan to use Oracle Autonomous Database on Dedicated Exadata Infrastructure. The Autonomous Database subnet must adhere to the organization's security policy, which mandates no direct internet access and private access to other VCN subnets. You need to ensure the proper IP address allocation and routing. Which of the following procedural steps is most effective for achieving this?
You are designing an OCI networking architecture for a multi-tier application using Infrastructure as Code (IaC). The architecture includes an OKE cluster for the front-end, a set of Compute instances for the back-end, and an Autonomous Database. You want to ensure that all traffic between these components is encrypted. You are using Transport Layer Security (TLS) for end-to-end encryption but are concerned about the overhead of encrypting all traffic within the VCN. Which approach provides the MOST balanced approach to security and performance, minimizing the overhead of encryption while still protecting sensitive data?
When migrating workloads to OCI requiring consistent, high-bandwidth connections with minimal latency, and your on-premises data center has direct fiber connectivity, which OCI service is most suitable?
You are managing a Site-to-Site VPN connection between your on-premises network and OCI. You notice that the VPN tunnel is frequently dropping and re-establishing. You have verified the internet connectivity at both ends and confirmed that the IKE (Internet Key Exchange) parameters are correctly configured. Which of the following is the most likely cause of the intermittent VPN tunnel disconnections?
You have configured DNSSEC for your domain hosted on OCI DNS. You understand the importance of regularly rotating your Key Signing Key (KSK) to maintain security best practices. Which of the following statements regarding KSK rotation in OCI DNS is TRUE?
When analyzing Flow Logs for a subnet, how can you filter logs to isolate traffic that was rejected due to a specific security list rule?
Which aspect of OCI’s security framework is essential for continuous monitoring and verification of packet flows, a core requirement of Zero Trust Packet Routing?
Your company utilizes a hybrid cloud architecture, connecting its on-premises network to an OCIVCN using a FastConnect private peering connection. You need to ensure that instances within a specific subnet in the VCN can only communicate with resources in a designated IP address range within the on-premises network. What is the MOST effective way to achieve this specific network isolation?
Your company is migrating an on-premises application to OCI. The application requires direct, low-latency access to an on-premises Microsoft SQL Server database. You’ve established a FastConnect connection between your on-premises network and an OCI VCN via a Dynamic Routing Gateway(DRG). You want to access this database from the OCI VCN. Which type of endpoint, in conjunction with appropriate routing, should you use to facilitate this connection?
In a multi-tier application environment with geographically dispersed teams requiring access to private resources, how can an OCI Bastion service be optimized to reduce latency for remote users?