Database Management Level Architecture | Three Level Architecture of DBMS
Database Management System: Computer Applications: The Three Level Architecture of DBMS.
Presentation layer
Application Layer
Database Tier
End Users:
External Level
Conceptual Level
Internal Level
Advantages of 2 tier Architecture:
Easy to understand
Requested data can be retrieved
Easy to modify
Easy to maintain
Advantages of 2 tier Architecture
Time consuming
Cost effectiveness
Advantages of 3 tier Architecture
Easy to maintain and modify
Improved security
Good performance
Disadvantages of 3 tier architecture
Complex
Costly to buy and run
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