In n-tier architecture (also known as multitier architecture), you need to apply the principle of loosely coupled design (refer to Chapter 4, Principles of Solution Architecture Design) and attributes of scalability and elasticity (refer to Chapter 3, Attributes of the Solution Architecture). In multilayer architecture, you divide your product functions into multiple layers, such as presentation, business, database, and services, so that each layer can be implemented and scaled independently.
With multitier architecture, it is easy to adopt new technologies and make development more efficient. This layered architecture provides the flexibility to add new features in each layer without disturbing features of other layers. In terms of security, you can keep each layer secure and isolated from others, so if one layer gets compromised, the other layers won't be impacted. Application troubleshooting and management also become manageable as you can...