Todays world is of internet and communication. We transfer and receive the data to interchange our information.install games.play movies.Use apps. All this things are regularly updated and each year we see very much enhance verson of this technology.

All this things require storage to store the things and our desktop drive is not enough to full fill our need and security is another threat which continuously arises .To help and rescue from all this problem we use cloud platform they are not really cloud .

To understand easily you can consider an example :: Suppose you have a image and you want to save it in your computer from your smartphone so what you will do. Connect a cable and transfer the file to the computer drive .

The modern cloud service also work in a similar way but it does not use cable instead it uses wire less connection like internet ,wifi,etc.

And also your file will be saved in an unknown place which no one know so it is very safe.

Security :The security of cloud platform is very high no one can access it is maintained and developed by high-quality engineers.

Problem:Sience one single data center cannot store whole world data and it is difficult to create big data center every where so it is the exception where there is certain limit.

To solve above problem a new method is used in this technology now a days. In which you can consider a bucket which is your file example .so you can use 5 mug to store the water inside the bucket and that 5 small mug are easy to place any where and when water is require it can again be pured into the bucket. Similarly small data centers are not created here suppose you have a disc space of 1 TB and it is free so you can connect it with the cloud service and they will pay you for that.and it will be use as a storage it is called as nods

Suppose there are 10 nods in different countrys and a user of USA uploads an image so it will be break into 5peaces and will be uploaded to 5 node each contain 1 peace and remaining 5 nodes are free so they will be used for other user .

So i think you have understood if any doubt comment below

Thankyou