Traditional 3-Tier
Presentation (WWW Server)
- Some studies refer to the “Client” tier
- Considering the Client as the “Presentation”
Application (CGI, J2EE, Cobol)
- Not necessarily an independent server
- Best defined by Usage
Data (dBaseIV, SQL, Contacts.TXT)
- Should not imply a DataBase in the operational sense
- Best considered as referential