Oracle Cloud (OCI) Interview Questions – NETWORK & ARCHITECTURE

Q: What is a landing zone in Oracle Cloud network architecture?

A: A landing zone is a standardized and secure environment within Oracle Cloud Infrastructure (OCI) that is designed to support an organization’s cloud adoption journey. It provides a framework for implementing best practices and security controls to enable enterprise-grade security and compliance. A landing zone can be customized to meet specific business requirements.

Q: How can you set up a landing zone in OCI?

A: You can set up a landing zone in OCI by following these steps:

Define the architecture requirements based on your organization’s needs, such as security, compliance, and operational needs.
Use Oracle’s Landing Zone Solution to deploy and configure the landing zone environment.
Configure the network and security controls, such as virtual cloud networks (VCNs), subnets, security lists, and firewall rules.
Deploy the required resources, such as compute instances, storage, and databases, in the appropriate subnets.
Use automation to manage the landing zone environment, such as using Terraform to automate the deployment and configuration of resources.

Q: How can you configure a VCN in OCI?

A: You can configure a VCN in OCI by following these steps:

Define the CIDR block for the VCN, which is the range of IP addresses that will be used in the VCN.
Create one or more subnets within the VCN, each with its own CIDR block.
Configure the security list rules, which define the inbound and outbound traffic rules for the VCN.
Configure the route table, which defines how traffic is routed within the VCN and to external networks.
Configure the internet gateway or virtual private network (VPN) gateway, depending on whether the VCN needs to connect to the internet or to on-premises networks.

Q: How can you implement a high availability architecture for an application in OCI?

A: You can implement a high availability architecture for an application in OCI by following these steps:

Deploy the application in multiple availability domains (ADs), which are physically isolated data centers within a region.
Configure load balancers to distribute traffic across the instances running in different ADs.
Use block volumes or object storage to store application data, which can be accessed by the instances in different ADs.
Configure database replication or backup to ensure that data is available in case of a failure.
Use automation to manage the deployment and scaling of the application, such as using Oracle Kubernetes Engine (OKE) to manage the containers and pods.

Q: How can you monitor the performance and availability of a network in OCI?

A: You can monitor the performance and availability of a network in OCI by using the following tools:

Oracle Cloud Infrastructure Monitoring: This tool provides metrics and alarms for resources such as compute instances, load balancers, and databases.
Oracle Cloud Infrastructure Logging: This tool provides centralized logging and analysis of logs from different OCI services.
Oracle Cloud Infrastructure Network Performance Monitoring: This tool provides insights into the network performance and latency between different regions, availability domains, and VCNs.
Oracle Cloud Infrastructure Health Checks: This tool provides automated health checks for load balancers and instances, and can trigger alarms if the health checks fail.
Third-party tools such as Grafana and Prometheus can also be used for monitoring and analysis.

Q: What is a virtual cloud network (VCN) peering in OCI?

A: VCN peering allows you to connect two VCNs within the same region using private IP addresses. This allows resources in one VCN to communicate directly with resources in another VCN, without the need for a public IP address or a VPN. VCN peering can be used to create hybrid cloud architectures or to isolate different tiers of an application within the same region.

Q: How can you set up VCN peering in OCI?

A: You can set up VCN peering in OCI by following these steps:

Ensure that the CIDR blocks of the two VCNs do not overlap.
Create a peering connection in each VCN, specifying the OCID of the other VCN’s peering connection.
Accept the peering connection request in each VCN.
Configure the security list rules to allow the desired traffic between the two VCNs.
Update the routing tables in each VCN to include the route for the other VCN’s CIDR block.

Q: What is Oracle Cloud Infrastructure FastConnect?

A: Oracle Cloud Infrastructure FastConnect is a service that provides a dedicated, private connection between on-premises data centers and OCI. This allows for low-latency, high-bandwidth connectivity that is more secure and reliable than internet-based connections. FastConnect can be used for hybrid cloud architectures, disaster recovery, and backup and archiving.

Q: How can you set up Oracle Cloud Infrastructure FastConnect?

A: You can set up Oracle Cloud Infrastructure FastConnect by following these steps:

Order a FastConnect circuit from an Oracle partner or a carrier.
Configure a virtual circuit on the FastConnect provider’s side, specifying the Oracle region and the customer’s port.
Create a virtual cloud network (VCN) and subnets in the desired region.
Configure a FastConnect private virtual interface (PNI) in the VCN, specifying the customer’s IP address and the VLAN ID of the virtual circuit.
Configure the routing tables in the VCN to route traffic to and from the FastConnect PNI.

Q: What is Oracle Cloud Infrastructure Load Balancing?

A: Oracle Cloud Infrastructure Load Balancing is a service that distributes incoming traffic across multiple compute instances or containers. This improves the availability and scalability of applications by spreading the workload across multiple resources. Load balancing can be configured for HTTP, HTTPS, TCP, and UDP protocols.

Q: How can you set up Oracle Cloud Infrastructure Load Balancing?

A: You can set up Oracle Cloud Infrastructure Load Balancing by following these steps:

Create a backend set, which defines the compute instances or containers that will receive the traffic.
Create a listener, which defines the protocol and port that the load balancer will listen on.
Create a load balancer, which will distribute the traffic to the backend set based on the configured algorithm.
Configure SSL/TLS encryption and health checks for the load balancer.
Use automation tools such as Terraform or Ansible to manage the load balancer configuration and scaling.

Q: What is the Oracle Cloud Infrastructure VPN service?

A: The Oracle Cloud Infrastructure VPN service allows you to create a secure, encrypted connection between your on-premises network and your VCN in OCI. This enables you to extend your on-premises network to the cloud and access resources in OCI as if they were on your local network.

Q: How can you set up the Oracle Cloud Infrastructure VPN service?

A: You can set up the Oracle Cloud Infrastructure VPN service by following these steps

Configure a virtual cloud network (VCN) and subnets in the desired region.
Create a public IP address resource for the VPN gateway.
Configure the VPN gateway, specifying the public IP address and the pre-shared key for the tunnel.
Create a remote network definition, which specifies the on-premises network and the IP addresses of the on-premises VPN devices.
Configure the routing tables in the VCN to route traffic to and from the VPN gateway.

Q: What is the Oracle Cloud Infrastructure Identity and Access Management (IAM) service?

A: The Oracle Cloud Infrastructure IAM service provides centralized management of users, groups, policies, and permissions for all OCI resources. It allows you to control access to resources based on the principle of least privilege, and to ensure compliance with security policies and regulations.

Q: How can you manage the Oracle Cloud Infrastructure IAM service?

A: You can set up the Oracle Cloud Infrastructure IAM service by following these steps:

Create a user account for yourself or for other members of your organization.
Create a group to group users with similar roles or responsibilities.
Create policies to define the permissions that the users or groups have for specific resources.
Assign the users or groups to the policies to grant them the appropriate access.
Use automation tools such as Terraform or Ansible to manage the IAM configuration and permissions.

Q: What is the Oracle Cloud Infrastructure Data Flow service?

A: The Oracle Cloud Infrastructure Data Flow service is a fully managed service for running Apache Spark applications at scale. It allows you to submit Spark jobs without the need to manage the underlying infrastructure or software, and provides automatic scaling and monitoring.

Q: How can you set up the Oracle Cloud Infrastructure Data Flow service?

A: You can set up the Oracle Cloud Infrastructure Data Flow service by following these steps:

Create a virtual cloud network (VCN) and subnets in the desired region.
Create a data flow application, specifying the Spark version and configuration.
Configure the input and output data sources, such as object storage or databases.
Submit the Spark job to the Data Flow service.
Monitor the job progress and output using the Data Flow console or APIs.

Q: What is an Oracle Cloud Infrastructure Region?

A: An Oracle Cloud Infrastructure Region is a geographical area that contains one or more data centers. Each Region is completely independent, and all services within a Region are designed to be highly available and fault-tolerant.

Q: How can you select the Oracle Cloud Infrastructure Region that best suits your business needs?

A: You can select the Oracle Cloud Infrastructure Region that best suits your business needs by considering factors such as data residency, compliance, latency, and cost. You should choose a Region that is geographically closest to your users or data sources, and that meets your compliance and regulatory requirements. You should also consider the cost of services in different Regions, as some services may be more expensive in certain Regions.

Q: What is an Oracle Cloud Infrastructure Availability Domain?

A: An Oracle Cloud Infrastructure Availability Domain is a physically isolated data center within a Region. Each Availability Domain is designed to be highly available and fault-tolerant, and is connected to other Availability Domains within the same Region by a high-speed, low-latency network.

Q: How can you configure an Oracle Cloud Infrastructure Virtual Private Network (VPN) in a multi-region deployment?

A: You can configure an Oracle Cloud Infrastructure VPN in a multi-region deployment by creating multiple VPN connections to each region, and configuring routing policies to ensure that traffic is routed to the closest VPN connection. You should also configure backup VPN connections and use automation tools to manage the VPN configuration.

Q: What is Oracle Cloud Infrastructure File Storage?

A: Oracle Cloud Infrastructure File Storage is a fully managed, highly available, and durable file storage service. It provides POSIX-compliant file systems that can be accessed from multiple compute instances within a virtual cloud network.

Q: How can you set up Oracle Cloud Infrastructure File Storage?

A: You can set up Oracle Cloud Infrastructure File Storage by following these steps:

Create a file system and a mount target within a virtual cloud network.

Create an export for the file system, specifying the security rules and export options.

Mount the file system on the compute instances that require access to the file system.

Use standard file system commands to manage the files and directories on the file system.

Use automation tools to manage the file system configuration and scaling.

Q: What is Oracle Cloud Infrastructure Object Storage?

A: Oracle Cloud Infrastructure Object Storage is a highly durable and available object storage service. It provides a scalable, secure, and cost-effective way to store and retrieve large amounts of unstructured data.

Q: How can you set up Oracle Cloud Infrastructure Object Storage?

A: You can set up Oracle Cloud Infrastructure Object Storage by following these steps:

Create a bucket to store the objects.
Configure the bucket policies to control access to the objects.
Upload objects to the bucket using the API, CLI, or console.
Use standard object storage commands to manage the objects in the bucket.
Use automation tools to manage the object storage configuration and scaling.

Q: What is Oracle Cloud Infrastructure Container Engine for Kubernetes (OKE)?

A: Oracle Cloud Infrastructure Container Engine for Kubernetes (OKE) is a fully managed, scalable, and highly available container orchestration service. It allows you to deploy and manage containerized applications using Kubernetes, without the need to manage the underlying infrastructure.

Q: What is an Oracle Cloud Infrastructure (OCI) Virtual Cloud Network (VCN)?

A: An OCI Virtual Cloud Network (VCN) is a private network that you set up in OCI. It provides communication between OCI resources and connectivity to on-premises resources. A VCN can be segmented into subnets and can span multiple Availability Domains within a Region.

Q: How can you create an OCI Virtual Cloud Network (VCN)?

A: You can create an OCI Virtual Cloud Network (VCN) by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Virtual Cloud Networks”.
Click on the “Create Virtual Cloud Network” button.
Specify the VCN name, the CIDR block, and other VCN settings.
Configure the subnets and other VCN resources.

Q: What is an OCI subnet?

A: An OCI subnet is a subdivision of a VCN. It allows resources within a VCN to be isolated from one another. Subnets can be configured with their own routing tables, security lists, and other resources.

Q: How can you create an OCI subnet?

A: You can create an OCI subnet by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Virtual Cloud Networks”.
Select the VCN that the subnet will belong to.
Click on the “Create Subnet” button.
Specify the subnet name, CIDR block, and other subnet settings.

Q: What are the types of OCI gateways?

A: Key types of OCI gateways are:

Internet Gateway (IGW)
NAT Gateway (NAT)
Service Gateway (SGW)

Q: What is an OCI Internet Gateway (IGW)?

A: An OCI Internet Gateway (IGW) is a gateway that enables communication between resources in a VCN and the internet.

Q: How can you create an OCI Internet Gateway (IGW)?

A: You can create an OCI Internet Gateway (IGW) by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Internet Gateways”.
Click on the “Create Internet Gateway” button.
Specify the IGW name and VCN that the IGW will belong to.

Q: What is an OCI NAT Gateway (NAT)?

A: An OCI NAT Gateway (NAT) is a gateway that enables private instances in a subnet to initiate outbound traffic to the internet while also blocking inbound traffic from the internet.

Q: How can you create an OCI NAT Gateway (NAT)?

A: You can create an OCI NAT Gateway (NAT) by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “NAT Gateways”.
Click on the “Create NAT Gateway” button.
Specify the NAT gateway name, VCN, and subnet that the NAT gateway will belong to.

Q: What is an OCI Service Gateway (SGW)?

A: An OCI Service Gateway (SGW) is a gateway that enables resources within a VCN to access Oracle services, such as Object Storage, without using the public internet.

Q: How can you create an OCI Service Gateway (SGW)?

A: You can create an OCI Service Gateway (SGW) by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Service Gateways”.
Click on the “Create Service Gateway” button.
Specify the service gateway name, VCN, and compartment that the service gateway will belong to.
Attach the service gateway to the VCN and configure the routing tables.

Q: What is an OCI security list (SL)?

A: An OCI security list (SL) is a virtual firewall that controls traffic to and from OCI resources. It is applied at the subnet level and allows you to create rules that control which traffic is allowed or blocked.

Q: How can you create an OCI security list (SL)?

A: You can create an OCI security list (SL) by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Security Lists”.
Click on the “Create Security List” button.
Specify the security list name, VCN, and compartment that the security list will belong to.
Configure the ingress and egress rules for the security list.

Q: What is an OCI network security group (NSG)?

A: An OCI network security group (NSG) is a group of security rules that you can apply to a VCN or subnet. It allows you to create network security policies that control traffic flow to and from a group of resources.

Q: How can you create an OCI network security group (NSG)?

A: You can create an OCI network security group (NSG) by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Network Security Groups”.
Click on the “Create Network Security Group” button.
Specify the NSG name, VCN, and compartment that the NSG will belong to.
Configure the ingress and egress rules for the NSG.

Q: What is an OCI route table?

A: An OCI route table is a virtual routing table that controls the flow of network traffic within a VCN or subnet. It allows you to create routes that direct traffic to specific destinations.

Q: How can you create an OCI route table?

A: You can create an OCI route table by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Route Tables”.
Click on the “Create Route Table” button.
Specify the route table name, VCN, and compartment that the route table will belong to.
Configure the routes for the route table.

Q: What is an OCI route propagation rule?

A: An OCI route propagation rule is a rule that allows a route table to receive routes from a dynamic routing gateway.

Q: How can you configure an OCI route propagation rule?

A: You can configure an OCI route propagation rule by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Route Tables”.
Click on the route table that you want to configure.
Click on the “Add Route Propagation” button.
Select the dynamic routing gateway that you want to use and specify the route table that you want to receive the routes.

Q: What is an Oracle Cloud Infrastructure (OCI) Remote Peering Connection (RPC)?

A: An OCI Remote Peering Connection (RPC) is a private peering connection between two VCNs in different regions. It allows the VCNs to communicate with each other using private IP addresses and without traversing the public internet.

Q: How can you create an OCI Remote Peering Connection (RPC)?

A: You can create an OCI Remote Peering Connection (RPC) by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Remote Peering Connections”.
Click on the “Create Remote Peering Connection” button.
Specify the RPC name, the local VCN, and the remote VCN.
Configure the routing and security rules for the RPC.

Q: What is an OCI DRG?

A: An OCI DRG (Dynamic Routing Gateway) is a virtual router that provides a private connection between a VCN and an on-premises network or other VCNs in different regions.

Q: How can you create an OCI DRG?

A: You can create an OCI DRG by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Dynamic Routing Gateways”.
Click on the “Create Dynamic Routing Gateway” button.
Specify the DRG name and the compartment that the DRG will belong to.
Attach the DRG to the VCN and configure the routing rules.

Q: What is an OCI VPN?

A: An OCI VPN (Virtual Private Network) is a private connection between a VCN and an on-premises network or other VCNs in different regions. It uses encrypted tunnels to ensure secure communication between the networks.

Q: How can you create an OCI VPN?

A: You can create an OCI VPN by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “VPN Connect”.
Click on the “Create VPN Connect” button.
Specify the VPN connect name, the local VCN, and the remote network.
Configure the VPN gateway and the routing rules for the VPN.

Q: What is an OCI NAT instance?

A: An OCI NAT instance is a compute instance that enables private instances in a subnet to initiate outbound traffic to the internet while also blocking inbound traffic from the internet.

Q: How can you create an OCI NAT instance?

A: You can create an OCI NAT instance by following these steps:

Sign in to the OCI console.
Click on the “Compute” menu, and then select “Instances”.
Click on the “Create Instance” button.
Specify the instance name, the VCN, and the subnet that the instance will belong to.
Configure the instance to act as a NAT by enabling IP forwarding, configuring NAT rules, and assigning a public IP address.

Q: What is an OCI network security group (NSG) rule?

A: An OCI network security group (NSG) rule is a rule that allows or denies traffic based on specific criteria, such as source IP, destination IP, protocol, and port.

Q: How can you create an OCI network security group (NSG) rule?

A: You can create an OCI network security group (NSG) rule by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Network Security Groups”.
Click on the NSG that you want to add the rule to.
Click on the “Add Ingress Rule” or “Add Egress Rule” button, depending on whether you want to allow or deny inbound or outbound traffic.
Specify the rule details, such as source IP, destination IP, protocol, and port.

Q: What is an OCI DNS resolver?

A: An OCI DNS resolver is a service that resolves domain names to IP addresses for OCI resources. It can be used to provide custom domain names for OCI resources and to integrate with on-premises DNS servers.

Q: How can you create an OCI DNS resolver?

A: You can create an OCI DNS resolver by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “DNS Resolvers”.
Click on the “Create Resolver” button.
Specify the resolver name, VCN, and the compartment that the resolver will belong to.
Configure the resolver settings, such as the forwarding rules and the listening addresses.

Q: What is an OCI internet gateway (IGW) route rule?

A: An OCI internet gateway (IGW) route rule is a rule that directs traffic to the IGW for access to the internet.

Q: How can you configure an OCI internet gateway (IGW) route rule?

A: You can configure an OCI internet gateway (IGW) route rule by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Route Tables”.
Click on the route table that you want to add the rule to.
Click on the “Add Route Rule” button.
Specify the rule details, such as the destination CIDR block and the internet gateway.

Q: What is an OCI local peering gateway (LPG)?

A: An OCI local peering gateway (LPG) is a virtual router that allows two VCNs in the same region to communicate with each other using private IP addresses.

Q: How can you create an OCI local peering gateway (LPG)?

A: You can create an OCI local peering gateway (LPG) by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Local Peering Gateways”.
Click on the “Create Local Peering Gateway” button.
Specify the LPG name, VCN, and the compartment that the LPG will belong to.
Configure the LPG peering rules to allow communication between the VCNs.

Q: What is an OCI service gateway (SGW) route rule?

A: An OCI service gateway (SGW) route rule is a rule that directs traffic to the SGW for access to Oracle services.

Q: How can you configure an OCI service gateway (SGW) route rule?

A: You can configure an OCI service gateway (SGW) route rule by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Route Tables”.
Click on the route table that you want to add the rule to.
Click on the “Add Route Rule” button.
Specify the rule details, such as the destination CIDR block and the service gateway.

Q: What is an OCI transit gateway?

A: An OCI transit gateway is a virtual router that allows you to connect multiple VCNs and on-premises networks in a hub-and-spoke topology.

Q: How can you create an OCI transit gateway?

A: You can create an OCI transit gateway by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Transit Gateways”.
Click on the “Create Transit Gateway” button.
Specify the transit gateway name, the compartment that the transit gateway will belong to, and the routing domain.
Attach the VCNs and on-premises networks to the transit gateway and configure the routing rules.

Q: What is an OCI route distribution?

A: An OCI route distribution is a mechanism for distributing routes across multiple routing tables in a VCN.

Q: How can you configure an OCI route distribution?

A: You can configure an OCI route distribution by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Route Tables”.
Click on the route table that you want to distribute routes from.
Click on the “Add Route Distribution” button.
Specify the route distribution name, the destination route table, and the distribution criteria.

Q: What is an OCI security zone?

A: An OCI security zone is a collection of resources that have similar security requirements. It allows you to apply consistent security policies to the resources in the zone.

Q: How can you create an OCI security zone?

A: You can create an OCI security zone by following these steps:

Sign in to the OCI console.
Click on the “Security” menu, and then select “Security Zones”.
Click on the “Create Security Zone” button.
Specify the security zone name, the compartment that the security zone will belong to, and the security policies.
Add the resources to the security zone and apply the security policies.

Q: What is an OCI bastion host?

A: An OCI bastion host is a compute instance that provides secure remote access to other compute instances in a VCN.

Q: How can you create an OCI bastion host?

A: You can create an OCI bastion host by following these steps:

Sign in to the OCI console.
Click on the “Compute” menu, and then select “Instances”.
Click on the “Create Instance” button.
Specify the instance name, the VCN, and the subnet that the instance will belong to.
Configure the instance as a bastion host by enabling SSH access, configuring security lists, and setting up users and SSH keys.

Q: What is an OCI public IP address?

A: An OCI public IP address is a unique, publicly routable IP address that can be assigned to an OCI resource, such as a compute instance, load balancer, or NAT gateway.

Q: How can you assign an OCI public IP address to a resource?

A: You can assign an OCI public IP address to a resource by following these steps:

Sign in to the OCI console.
Click on the resource that you want to assign the public IP address to.
Click on the “Add Public IP” button.
Select the public IP address that you want to use.

Q: What is an OCI DNS zone?

A: An OCI DNS zone is a domain that is managed by the OCI DNS service. It contains records that map domain names to IP addresses for OCI resources.

Q: How can you create an OCI DNS zone?

A: You can create an OCI DNS zone by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “DNS Zones”.
Click on the “Create Zone” button.
Specify the zone name, the compartment that the zone will belong to, and the zone type.
Add the DNS records for the zone.

Q: What is an OCI DNS record?

A: An OCI DNS record is an entry in an OCI DNS zone that maps a domain name to an IP address or other resource.

Q: How can you create an OCI DNS record?

A: You can create an OCI DNS record by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “DNS Zones”.
Click on the DNS zone that you want to add the record to.
Click on the “Add Record” button.
Specify the record details, such as the record type, name, and value.

Q: What is an OCI DNS resolver rule?

A: An OCI DNS resolver rule is a rule that directs DNS traffic to an OCI DNS resolver.

Q: How can you configure an OCI DNS resolver rule?

A: You can configure an OCI DNS resolver rule by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “DNS Resolver Rules”.
Click on the “Create DNS Resolver Rule” button.
Specify the rule name, the VCN, and the resolver to use.
Configure the rule conditions and the DNS response settings.

Q: What is an OCI DNS listener?

A: An OCI DNS listener is an endpoint that listens for DNS queries and responds with the appropriate DNS records.

Q: How can you create an OCI DNS listener?

A: You can create an OCI DNS listener by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “DNS Listeners”.
Click on the “Create Listener” button.
Specify the listener name, the VCN, and the listener type.
Configure the listener settings, such as the port number and the DNS zones to serve.

Q: What is an OCI DNS zone transfer?

A: An OCI DNS zone transfer is a process for copying DNS zone data from one DNS server to another.

Q: How can you configure an OCI DNS zone transfer?

A: You can configure an OCI DNS zone transfer by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “DNS Zones”.
Click on the DNS zone that you want to transfer.
Click on the “Edit Zone” button.
Specify the name and IP address of the DNS server that will receive the zone transfer.
Configure the zone transfer settings, such as the transfer type and the access control list.

Q: What is an OCI DNS resolver endpoint?

A: An OCI DNS resolver endpoint is an IP address that you can use as the DNS resolver for on-premises resources to resolve DNS queries for OCI resources.

Q: How can you configure an OCI DNS resolver endpoint?

A: You can configure an OCI DNS resolver endpoint by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “DNS Resolvers”.
Click on the resolver that you want to use as the endpoint.
Click on the “Create Endpoint” button.
Specify the endpoint name, the IP address range, and the compartment that the endpoint will belong to.

Q: What is an OCI DNS view?

A: An OCI DNS view is a mechanism for providing different DNS responses based on the requester’s IP address.

Q: How can you configure an OCI DNS view?

A: You can configure an OCI DNS view by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “DNS Views”.
Click on the “Create View” button.
Specify the view name, the VCN, and the view type.
Configure the view rules and the DNS response settings.

Q: What is an OCI DNS steering policy?

A: An OCI DNS steering policy is a policy that determines how traffic is directed to different endpoints based on the requester’s location or other criteria.

Q: How can you configure an OCI DNS steering policy?

A: You can configure an OCI DNS steering policy by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “DNS Steering Policies”.
Click on the “Create Steering Policy” button.
Specify the policy name, the steering type, and the criteria for steering.
Configure the endpoints and the weights for each endpoint.

Q: What is an OCI DNS zone file?

A: An OCI DNS zone file is a text file that contains the DNS records for a DNS zone.

Q: How can you import an OCI DNS zone file?

A: You can import an OCI DNS zone file by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “DNS Zones”.
Click on the DNS zone that you want to import the file to.
Click on the “Import Zone File” button.
Upload the zone file and review the imported records.

Q: What is an OCI DNS health check?

A: An OCI DNS health check is a test that monitors the availability and performance of a DNS endpoint.

Q: How can you configure an OCI DNS health check?

A: You can configure an OCI DNS health check by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “DNS Health Checks”.
Click on the “Create Health Check” button.
Specify the health check name, the endpoint to check, and the check type.
Configure the health check settings, such as the frequency and the threshold.

Q: What is an OCI DNS resolver forwarder?

A: An OCI DNS resolver forwarder is a DNS resolver that forwards DNS queries to another resolver, typically for resolving non-OCI resources.

Q: How can you configure an OCI DNS resolver forwarder?

A: You can configure an OCI DNS resolver forwarder by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “DNS Resolvers”.
Click on the resolver that you want to use as the forwarder.
Click on the “Create Forwarder” button.
Specify the forwarder name and the IP address of the target resolver.

Q: What is an OCI IPSEC VPN connection?

A: An OCI IPSEC VPN connection is a secure, encrypted connection between an on-premises network and an OCI VCN.

Q: How can you create an OCI IPSEC VPN connection?

A: You can create an OCI IPSEC VPN connection by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “VPN Connect”.
Click on the “Create Connection” button.
Specify the connection name, the VCN, and the on-premises details.
Configure the tunnel settings, such as the encryption and authentication algorithms.

Q: What is an OCI IPSEC VPN gateway?

A: An OCI IPSEC VPN gateway is a virtual router that terminates IPSEC VPN connections in a VCN.

Q: How can you create an OCI IPSEC VPN gateway?

A: You can create an OCI IPSEC VPN gateway by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “VPN Connect”.
Click on the “Create Gateway” button.
Specify the gateway name, the VCN, and the compartment that the gateway will belong to.
Configure the gateway settings, such as the public IP address and the routing rules.

Q: What is an OCI FastConnect gateway?

A: An OCI FastConnect gateway is a virtual router that terminates FastConnect connections in a VCN.

Q: How can you create an OCI FastConnect gateway?

A: You can create an OCI FastConnect gateway by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “FastConnect”.
Click on the “Create Gateway” button.
Specify the gateway name, the VCN, and the compartment that the gateway will belong to.
Configure the gateway settings, such as the provider and the routing rules.

Q: How can you create an OCI DNS traffic management steering policy?

A: You can create an OCI DNS traffic management steering policy by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “DNS Traffic Management”.
Click on the “Create Steering Policy” button.
Specify the policy name, the steering type, and the criteria for steering.
Configure the endpoints and the weights for each endpoint.

Q: What is an OCI IP address reservation?

A: An OCI IP address reservation is a mechanism for reserving a specific IP address within a subnet for a specific resource.

Q: How can you reserve an OCI IP address?

A: You can reserve an OCI IP address by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Virtual Cloud Networks”.
Click on the VCN that the subnet is in.
Click on the subnet that the IP address belongs to.
Click on the “Reserved IPs” tab and specify the IP address to reserve and the resource to assign it to.

Q: What is an OCI IP address pool?

A: An OCI IP address pool is a range of IP addresses that are reserved for use within a VCN.

Q: How can you create an OCI IP address pool?

A: You can create an OCI IP address pool by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Virtual Cloud Networks”.
Click on the VCN that the pool will be in.
Click on the “IP Address Pools” tab and specify the range of IP addresses to reserve.

Q: What is an OCI NSG?

A: An OCI NSG is a security group that controls inbound and outbound traffic for a set of resources within a VCN.

Q: How can you create an OCI NSG?

A: You can create an OCI NSG by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Security Lists”.
Click on the “Create Security List” button.
Specify the NSG details, such as the name, the VCN, and the compartment that the NSG will belong to.
Configure the NSG rules, such as the source and destination CIDR blocks and the protocol.

Q: What is an OCI route table?

A: An OCI route table is a set of rules that determines how traffic is routed within a VCN or between VCNs.

Q: How can you create an OCI route table?

A: You can create an OCI route table by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Route Tables”.
Click on the “Create Route Table” button.
Specify the route table details, such as the name, the VCN, and the compartment that the route table will belong to.
Configure the route rules, such as the destination CIDR block and the target.

Q: What is an OCI RPC?

A: An OCI RPC is a mechanism for connecting two VCNs within the same region or between different regions using a private network connection.

Q: How can you create an OCI RPC?

A: You can create an OCI RPC by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “Remote Peering Connections”.
Click on the “Create RPC” button.
Specify the RPC details, such as the name, the VCN, and the compartment that the RPC will belong to.
Configure the RPC settings, such as the peer VCN and the routing rules.

Q: What is an OCI NAT gateway?

A: An OCI NAT gateway is a virtual router that allows resources in a private subnet to access the internet using a public IP address.

Q: How can you create an OCI NAT gateway?

A: You can create an OCI NAT gateway by following these steps:

Sign in to the OCI console.
Click on the “Networking” menu, and then select “NAT Gateways”.
Click on the “Create NAT Gateway” button.
Specify the NAT gateway details, such as the name, the VCN, and the compartment that the NAT gateway will belong to.
Configure the NAT gateway settings, such as the public IP address and the private subnet.

Author
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Brijesh Gogia

I’m an experienced Cloud/Oracle Applications/DBA Architect with more than 15 years of full-time DBA/Architect experience. I have gained wide knowledge on Oracle and Non-Oracle software stack running on-prem and on Cloud and have worked on several big projects for multi-national companies. I enjoy working with leading-edge technology and have a passion for Cloud architecture, automation, database performance, and stability. Thankfully my work allows me time for researching new technologies (and to write about them).

Oracle Cloud (OCI) Interview Questions – NETWORK & ARCHITECTURE

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