Can you explain the main differences between monolithic, service-oriented, and microservices architectures?

Monolithic architecture is when the entire application is built as a single large block. All components and functions are tightly integrated, and the application is deployed as a whole. This is simpler in the initial stages of development, but as complexity grows, it becomes difficult to maintain and scale.

Service-oriented architecture (SOA) involves dividing the application into separate services that interact with each other through standardized interfaces (e.g., SOAP or REST). Services can be larger and more isolated than microservices, and are often focused on business functions.

Microservice architecture is a finer division of the application into many small, independent services. Each microservice is responsible for a specific function and can be developed, deployed, and scaled independently. This increases system flexibility and resilience but requires complex organization of interaction and management.

In brief:

• Monolithic: a single application, difficult to scale.
• Service-oriented: large services, interaction through standards.
• Microservices: many small services, independence and flexibility.