Web server, application server and database server concepts, difference

1. Server
“A Server is a high performance computer that runs a Server Software and is
capable to handle user requests, managing networks data & resources, provides
some kind of shared services to the connected workstation (clients) over a
communication channel(network).
Weather
Server
Server A
Server B

2. Web Server
Internet Server
Web Content
“Web server refers to server software, or hardware dedicated to running said
software, that can serve contents to the World Wide Web. A web server processes
incoming network requests over the HTTP protocol (and several other related
protocols).”

3. Web Server
Application
Data Store
Application
Server
Static
Data
Store
Web
Server
• Handles HTTP Protocol(static contents).
• No Server Side Programming.
• Serves Web Based Applications ( JSP, Servlets, PHP, HTML, etc. ).
• No Database Connection Pooling, No EJB.
• Examples: Apache HTTP, IIS, Sun Java System, Resin etc.

4. Application Server
• Serves dynamic Business Logic.
• Handles Backend Logic like database, calculations, processing, etc.
• Deploys Applications, Dependency Injection, Security, etc.
• Database Pooling, EJB.
• Superior server of Web Server.
• Glassfish, JBoss, WebSphere, etc.
User
App Server Database Server Database

5. Database Server
“A database server is a
server which houses a
database application that
provides database services
to other computer
programs or to computers,
as defined by the client–
server model”

6. Database Server
• Stored Procedures
• Transactions
• Database Connections
• Security, Performance, Data Integrity, Reduce Network Traffic
Database Servers

7. Web, App and DB Server
Database Server
Application Server
Web Server
User/Client
ServerClient

8. Thank You!