Mainframe Architecture Terminal (Display/Keyboard) Mainframe (Host) - Communications - User Interface - Business Logic - DBMS - Operating System - Storage (DB Files)
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Stand-Alone PC Architecture Personal Computer or Workstation - User Interface - Business Logic - DBMS - Operating System - Storage (DB Files)
File Sharing Architecture Client - User Interface - Business Logic - DBMS - Communications - Operating System File Server - Communications - Operating System - Storage (DB Files) Local area network
“Classic” Client/Server Architecture Client - User Interface - Business Logic - Communications - Operating System Database Server - Communications - DBMS - Operating System - Storage (DB Files) Local area or wide area network
Client/Server Interaction Client PC - User Interface - Business Logic - DB Driver - Communications - Operating System Database Server - Storage (DB Files) - Operating System - DBMS - DB Listener - Communications SQL Request Server Response
Three Tier Client/Server Architecture Variation 1: Application Server Client - User Interface - Communications - Operating System Applications Server - Business Logic - Operating System - DB Driver - Communications Client - User Interface - Communications - Operating System Database Server - Communications - DBMS - Operating System - Storage (DB Files) Local area or wide area network
Three Tier Client/Server Architecture Variation 2: Transaction Processing Server Client - User Interface - Communications - Operating System Client PC - User Interface - Communications - Operating System Transaction Processing Server - Transaction Processor - Operating System - DB Driver - Communications Database Server - Communications - DBMS - Operating System - Storage (DB Files) Local area or wide area network
Distributed Database Architecture Database Server (Node) - Application(s) - Communications - DBMS - Operating System - Storage (DB Files) Local area or wide area network
Open Data. Base Connectivity (ODBC) Application Oracle ODBC Driver Oracle DB Driver Oracle RDBMS Sybase ODBC Driver Sybase DB Driver Sybase RDBMS ODBC API
Web Access to DBMS Client User Interface: Web Browser HTML Forms Java. Script Communications: TCP/IP Operating System Web Server - HTTP Server - Web Application - Internet Comm: TCP/IP - DB Comm. : DB Driver - Operating System Database Server - Communications - DBMS - Operating System - Storage (DB Files) Local area or wide area network
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