Overview of Cloud Infrastructure: Architecture and Network Topology

In our Cloud Infrastructure architecture, we use AWS as our cloud services provider. The storage layer leverages AWS S3 for securely hosting eLearning content, with AWS CloudFront employed to efficiently distribute this content. Transactional email communications and payment processing functionalities are handled through respective third party service integrations.

Traffic management is orchestrated through a robust load balancing framework, which includes multiple layers of load balancers to effectively manage incoming traffic and handle TLS termination. This multi-tiered setup ensures optimized traffic flow and enhances security against potential Denial-Of-Service (DoS) attacks.

Monitoring Strategy and Scaling

Our infrastructure employs comprehensive monitoring services to ensure the system's optimal health. Upon detecting any issues, our technical team is on call 24 hours a day, ready to conduct immediate investigations and implement necessary corrective measures. Additionally, we proactively manage system performance through dynamic scaling. This involves the ability to swiftly adjust our resource allocation as dictated by current performance requirements and bottlenecks. This integrated strategy ensures both the stability and scalability of our services.

Contingency Measures

Our data resilience strategy hinges on utilizing Amazon S3 for user file storage, offering a durability guarantee of 99.999999999% for objects.

Furthermore, our databases receive daily backups, stored on a distinct infrastructure setup. To expedite recovery from potential catastrophic failures, we maintain complete backups of all database server virtual machines, ensuring the restoration of services when necessary.

Topology

In the diagram below, you can see the system’s network topology and architecture.