Three-Tier Architecture
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Three-tier architecture is a software design pattern that separates an application into three layers: presentation, business logic, and data. This separation promotes scalability, maintainability, and flexibility.

1️⃣Presentation Layer (Client Tier)

   - Role: Manages the user interface.
   - Components: Web browsers, mobile apps.
   - Technologies: HTML, CSS, JavaScript.
  
2️⃣Business Logic Layer (Application Tier)

   - Role: Processes business logic and rules.
   - Components: Application servers.
   - Technologies: Java, .NET, Python.
  
3️⃣Data Layer (Data Tier)

   - Role: Manages data storage and retrieval.
   - Components: Database servers.
   - Technologies: SQL, NoSQL databases.