From my search, there are many different types of servers used in the market place today (for example: web servers, FTP servers, mail servers, audio/video servers, application servers, chat servers, News servers, server platform, fax servers, List servers... ). Check it here
To Compare Server Features, you can check the following url:
Web servers vs Application server
Web server serves pages for viewing in web browser via defined protocols. They host websites, connect to the browser to handle HTTP requests, like website www.google.com is hosted on google web server which can be accessed globally via web browser.
Application server runs the applications (programs), serves bussiness application programs through various protocols. Normally application server has a third server, the database server, that provides data for the applications.
Web server and Application servers are both serving a client but web server can (nearly) only serve html pages. Application server is more dynamic than web server. We can also configure an application server to work as a web server. It also could be argued that an application server is a superset of web server.
There are three reasons to separate the web server and the application server:
1. Security. Web servers are easier to secure from attacks because they only have show pages.
1. Security. Web servers are easier to secure from attacks because they only have show pages.
2. Scalability. Both server can be upgraded or more servers can be added as needed.
3. Performance. Web servers need to transport lots of data, application servers generally do
computing. They can be specialized for their tasks in terms of CPU, RAM, storage, etc. Link
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