Need Of Cloud Computing

Everybody is talking about Cloud, it's not the cloud which u can see above the sky. It's Cloud Computing a service which change the way of what we use computer and internet. We use cloud as a symbol of internet in many books and magazine. But the the entire concept has changes. Introduction of internet was to of file sharing among the user which dramatically change to information and bulletin system. Now we all depend on internet even before proposing a girl we seek help from Google "How to propose a girl" and yes Google is always with us of how what when question i think he got tried of answering all the question of us which we repeatedly ask to it almost every hour Oh you don't know that answer search in Google. Now question comes how Google is able to process such a lot of information within a short period of time well same question you can ask to it.

So, here it comes Google has many data center (DC) in many countries  Data center means many cluster of server, cluster means similar group of objects which perform the same task. This DC stores all the information of world wide website information to their server and when you search it search all the data in their server and give you the results well Google don't store all the website details it just some extract some links and some data from the website.

Does Google has to do anything with cloud computing. Yes.
I believe you must be using gmail, youtube, etc etc.
Without installing anything on your system you able to see your mail send it store it. Mail is application which use POP and SMTP protocol to receive and send mail. Youtube without downloading any video from net you are able to see a video on internet explorer.

So cloud it can be say an application which runs on browser without installing anything on your system. So what we need to use cloud computing An system which support a browser that's it.

Cloud Computing use virtulization technologies. Virtualization is a virtual which don't exist but you can feel it. It is build above the parent OS and which acts as real host without the knowledge of user.