Web Servers Vs Application Servers

Before going to the comparison, let us understand what is a computer server in the first place. A server is a computing device which is responsible for providing various services to its clients. The nature of these services can be anything, like file transferring, resource sharing, etc. Client and server systems provide functions such as centralized access to information, data storage and other resources. So this is what a server does generally.

When you are trying to explore a web server, you have to consider what hyper text transfer protocol (HTTP) is and then proceed further. HTTP is an application level protocol used for presenting hypermedia information system. Basically, this protocol is used when there are many different types of media involved. Well, web servers are those real or virtual machines that are responsible for delivering content. Clients are those machines or web browsers that request for any such content (HTML pages). Primarily, clients request for the content, but in some cases they have to deliver it as well (while submitting information for creating email accounts, etc.).

An example: Consider that you wish to create an email account. First you type the web address of the email service provider in your browser. The terminal from which you are accessing the website is the client in this case. Once you enter the address, you will see that the URL is changed and now it is starting with “http://…”. This action is the indication that hypertext transfer protocol is being used. In a matter of seconds, you see that webpage of the email service provider are loaded onto your browser. This action indicates that the web server has provided content to the browser. And when you provide information to the website (for opening an account), you are basically sending information to the web server.

Security of Web Servers

  • Remove Unnecessary Services: It is the first thing that any administrator must do. Remove any unnecessary services so that any person with malicious intent does not take advantage of those services.
  • Remote Access: An administrator of the server must always try to login from a local terminal, so that any unauthorized access from outside can be restricted. Remote access as a policy should be completely denied (but this may not be a very practical solution).
  • Important Data on Separate Disk: It is a common experience that the data on the drive (same as that of OS) can be exploited by a hacker once he gains access to the root directory. Hence, this data should be placed in a separate disk drive.
  • Use Scanners: Scans for detecting viruses, malware and spamware must be performed regularly.

Advantages of Web Servers

  • Virtual Hosting: Used for hosting more than one domain name on the same computer.
  • Large File Support:They can even support files size in GBs.
  • Bandwidth Throttling: Using this method, they are able to serve many clients.

Application servers are basically those servers which support the dynamic content requests by different applications. They can be looked upon as a software framework, which do the job of efficient execution of procedures. Application servers are dedicated or designed for handling specific applications such as database management systems like Oracle or MySQL. If the complexity involved in such an application is very large, then all the resources maybe dedicated to it. But this is a rare case, an application server is designed to handle many applications.

An example: Many times, the information that a client requests for needs a lot of computations. These computations maybe beyond the capabilities of the client itself. So they have to be done on the server, and then the results are sent to client. An ATM is a real-life example for this. An ATM does not credit or deposit any money in any bank account. This task is within the domain of the centralized servers of a particular bank. An ATM basically sends the request for withdrawal or deposit of the amount, these actions are then performed by the application server of the bank.

Security of Application Servers

  • Permissions and Privileges: If needless privileges are assigned to the application software, then a hacker can exploit these services. This way, other tasks of the server could also be hampered.
  • Monitor and Audit the Server: This is a very important task, as a lot of malicious attempts on the server are discovered by means of audit by itself. Besides, continuous monitoring of the network can help thwart an ongoing security breach.
  • User Accounts: Disabling all the default accounts that were created while installing the operating system is of paramount importance. A hacker taking advantage of such negligence is simply unacceptable.
  • Unused Modules and Application Extensions: Again, all the needless things which might take up resources should be removed. This includes unused application modules and extensions.

Advantages of Application Servers

  • Centralized Configuration: Some changes (like changing a setting for everyone) takes place centrally.
  • Security: They are able to provide better security to the data, as most of the computation takes place at server side.
  • Performance: In a heavy usage environment, the client server model provides better security.

This article was an attempt to explain the differences between application servers and web servers. We can simply conclude that web servers are meant for handling webpages, whereas application servers are meant to handle web-based as well as desktop applications.

How to Build a Web Server

You may want to build your own server for a small business or if you wish to start your own website. To build a web server, you need a computer and the required software. Also, building one will save money to a great extent. It contains pages of your website in Hypertext Markup Language (HTML). The one you build should be connected to the Internet all the time, so that everybody on the Internet can access your website.

Requirements

The configuration of the computer used for building a web server must match the basic requirements. A random access memory (RAM) of 4GB or more is required. The RAM requirements increase as the number of clients of your website increases. For this, you must always track website visitors. A high speed Internet connection is also one of the basic requirements to keep it connected to the Internet. Along with this, you need to have a permanent IP address. Sometimes, many website owners face the problem of dynamic IP address. If the dynamic IP problem is not solved, the IP address of the website will keep on changing and the Internet user will not be able to connect to your web server. You must buy a permanent IP address from the Internet service provider, which is somewhat costly. The software required to develop and maintain the client-server interaction is called web server software. There are many software applications available, of which, some are specific to a particular operating system.

Instructions

Step I
The first step is to install the software. This software is responsible for finding the requested web page. After installing the software, configure it accordingly so that the search for web pages within the server is easy. When an Internet user types a URL, the software directs the user to the requested page on the Internet.

Step II
The domain name is assigned to the server. This is a convenient way so that it is easier to remember the IP address of the web server. You need to buy the name from a domain name provider and the domain name servers keep a track of the corresponding IP address of the websites. When the Internet user types your name in the web browser, the domain name server makes it easier to find the IP address of the requested website. To build a server, you need to configure the domain name server and the router. The router will transfer the request of the Internet user to the server.

Step III
The web server must be protected with an antivirus software to ensure protection against viruses and worms. If you do not protect it from the virus attacks, you may lose all the data of your website, which at times may be confidential.

The main advantage of owning a web server is to cut down on the charges required for hosting your website. Owning a website can also earn you extra money if you host various other websites. The only thing you need to do is to upgrade your computer to the configuration suitable for the extra load of other websites. For online gamers, building a web server is an interesting option.