Oracle Cloud Infrastructure (OCI) architecture diagram. When designing an OCI architecture, you would generally include the following layers and components:

Network Layer

1. Virtual Cloud Network (VCN): The foundational block that provides a private, isolated network in the Oracle Cloud.
2. Subnets: Specific ranges within the VCN where your resources reside. They can be public or private.
3. Internet Gateway: Provides a path for network traffic between the VCN and the internet.
4. NAT Gateway: Allows private resources to initiate outbound traffic to the internet without exposing them to incoming internet connections.
5. Service Gateway: Provides a private connection to Oracle services.
6. Dynamic Routing Gateway (DRG): Enables private traffic between your on-premises network and your VCN.

Compute Layer

1. Compute Instances: Virtual machines that run applications.
2. Auto Scaling Groups: Automatically adjust the number of VM instances based on performance metrics.
3. Container Engine: For deploying and managing Docker containers.

Storage Layer

1. Block Storage: High-performance storage volumes.
2. Object Storage: Storage for data like files, backups, and logs.
3. File Storage: A managed file system service.

Database Layer

1. Autonomous Database: A fully managed database service.
2. DB Systems: A more traditional, self-managed RDBMS service.

Application Layer

1. Load Balancer: Distributes incoming application traffic across multiple targets.
2. API Gateway: Manages, secures, and monitors APIs.
3. Serverless Functions: FaaS (Function as a Service) for running code snippets.

Security Layer

1. Identity and Access Management (IAM): To control who has access to what resources.
2. WAF (Web Application Firewall): Protects your web applications from various attacks by filtering and monitoring HTTP traffic between a web application and the internet.