Differentiate public cloud from private cloud.

 Cloud Computing

Cloud Computing is the delivery of on-demand IT resources (such as the Internet, database, Server, Big-Data, etc ) implemented on the internet to process, manage and store data. In cloud computing, we can pay for only those resources which we have used.

Benefits of Cloud Computing:

  • Data backup and Storage of data
  • Powerful server capabilities
  • Incremental Productivity
  • Cost-effective and Time-saving
  • Agility (Access to a broad range of technology)
  • Elasticity
 

 The differentiating public cloud from the private cloud.

Public CloudThe cloud services which are exposed to the public and can be used by anyone are called public clouds. The public cloud is owned, managed, and operated by businesses, universities, and government organizations. In the public cloud, data centers are located anywhere on the internet.
 Private Cloud: The cloud services which are private in the internal network within the organizations and selected users instead of the general public are called a private cloud. It provides a high level of security and privacy to data through firewalls. In private clouds, data centers are located inside the organization's network.

OR,

 Public Cloud

  • Cloud Computing infrastructure is shared with the public by service providers over the internet. It supports multiple customers i.e, enterprises.
  • Multi-Tenancy i.e, Data of many enterprises are stored in a shared environment but are isolated. Data is shared as per rules, permission, and security.
  • The cloud service provider provides all the possible services and hardware as the user base is the world. Different people and organizations may need different services and hardware. The services provided must be versatile. 
  • It is hosted at the Service Provider site.
  • It is connected to the public internet.
  • Scalability is very high, and reliability is moderate. 
  • The cloud service provider manages the cloud and customers use them.
  • It is cheaper than the private cloud.
  • Security matters and is dependent on the service provider.
  • Performance is low to medium.
  • It has shared servers.
  • Example: Amazon web service (AWS) and Google AppEngine etc.

Private Cloud

  • Cloud Computing infrastructure is shared with private organizations by service providers over the internet. It supports one enterprise.
  • Single Tenancy i.e, Data of a single enterprise is stored.
  • Specific services and hardware as per the need of the enterprise are available in a private cloud.
  • It is hosted at the Service Provider site or enterprise.
  • It only supports connectivity over the private network.
  • Scalability is limited, and reliability is very high.
  • Managed and used by a single enterprise.
  • It is costlier than the public cloud.
  • It gives a high class of security.
  • Performance is high.
  • It has dedicated servers.
  • Example: Microsoft KVM, HP, Red Hat & VMWare etc.

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