Mumbai University > Information Technology > Sem 4 > Web Programming

Marks: 5M

Year: Dec 2014, Dec 2015

• In 3 tier architecture, there are 3 components: Client PC, An Application server and A Database Server.
• The work of server is distributed among application server and database server.
• Application server has the required communication functions.
• The data required by the business logic exists in database server.
• The required data is returned to public servers and then to client PC.

Advantages:

• Improved Data Integrity
• High Degree of Flexibility in deployment platform and configurations
• Improved security
• High Performance and persistent objects
• Architecture is scalable, adding users and resources in future would be easy
• Maintenance and modifications can be done effectively
• Code and data reusability can be achieved

Disadvantages:

• 3 tier architecture is complex compared to 1 tier and 2 tier
• Cost of network maintenance and deployment is greater than 1 tier and 2 tier