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cloud computing

As the name implies, where computing resources (applications, servers and other resources) are in the cloud (Amazon, Microsoft, and so on), as shown below:-

As we know, setting up companies infrastructure requires time, money and lots of efforts. To simply this, cloud computing provides us pre-built and pre-configured servers very quickly and easily. The cost is dependent upon the usage, but not on the actual cost of servers. There are three types of cloud:-

1. Public Cloud: This service is shared with others and everyone is sharing the same set of infrastructure. Example is, Amazon Web Services, and Google Mail etc. Smaller clients prefer this service, since there is no huge cost involved.

2. Private Cloud: This service is dedicated to only one company. Most of the times, this server is a virtual server accessed by the secured connection, like VPN. This service is recommended for high-confidential data and your company policies strictly restricts for sharing it with others. Big players are building private clouds for data protection and high performance

3. Hybrid Cloud: This service is the combination of Private and Public cloud. Organization can continue to use their physical hardware for their operational data, but also use virtualized cloud instances, like Amazon Simple Storage Service (Amazon A3) for archived data. This service is mostly used for archiving and backup data, where local data is replicated to the public cloud.

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