1. >> Introduction to Web Applications

2. Web-based Systems | Misbhauddin
Web Applications
A web application is an application utilizing web and [web] browser technologies to accomplish one or more tasks over a network, typically through a [web] browser
Also referred to as Web Apps or Web Widgets
Web-based Systems | Misbhauddin

3. Websites vs. Web Applications
Static
Function: Display content 
No programming language or DB required
No or Limited User Interaction Required
Not (often) updated
Dynamic
Function: Perform Tasks and Transactions
Web programming language & DB required
Rely on the user to interact
Ever-changing
Web-based Systems | Misbhauddin

4. Web-based Systems | Misbhauddin
Network
Browser
Components of a Web App
Web Technologies
S/W Application
Web-based Systems | Misbhauddin

5. How Web Applications Work
Application Layer
Web Server
Client / Visitor
Application
Web Server
Presentation Layer
Three Layer Model
Storage Layer
Database
Web Server
Web-based Systems | Misbhauddin

6. Web-based Systems | Misbhauddin
Types of Web Apps
Searching
Communication
Multimedia
Publishing
Social N/W
Shopping
Desktop Alt.
Web-based Systems | Misbhauddin

7. Types of Web Apps: Desktop S/W Alternatives
Office Applications
Project Management
Multimedia-editing
Programming
Web-based Systems | Misbhauddin

8. Web-based Systems | Misbhauddin
The +ve & the -ve
Benefits
Drawbacks
Platform-independent (Any Hardware & Any OS)
No download, installation or update required
Background objects such as databases are not on the user’s computer
Security
Must be available 24x7
Testing done is not exhaustive
Anything on the web stays on the web FOREVER
Web-based Systems | Misbhauddin