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Public Cloud, Private Cloud, Hybrid Cloud

Public Cloud, Private Cloud, Hybrid Cloud

Public Cloud, Private Cloud, Hybrid Cloud

Cloud Computing Classification Criteria

There are various criteria for classifying cloud computing. 
In Berry Soshinsky's 'Cloud Computing Bible', cloud computing is divided into a batch model and a service model. 

The deployment model is classified according to the location and operation of the cloud infrastructure, and is divided into public cloud, private cloud, hybrid cloud, etc. 

The service model is a model that classifies the level of infrastructure to be serviced to users, and it is divided into IaaS, SaaS, PaaS and DaaS. 
In this article, we will look at the concepts of public cloud, private cloud, and hybrid cloud, which are deployment models.

Public Cloud (Public Cloud, Public Cloud, Open Cloud)

It is a cloud service model for all users with Internet access, not a service for a specific company or user. Resources such as data, functions, and servers are privileged or isolated for each user in each service, so there is no interference between service users.

Private Cloud (Private Cloud, Closed Cloud)

Resources and data of cloud services that are intended only for specific companies or specific users on a limited network are stored inside the company. The enterprise also has control of the resource. Therefore, the security is very good, and it has the advantage of being able to customize cloud functions according to the circumstances of individual customers.

Hybrid Cloud

Hybrid cloud has been regarded as a method of using a public cloud and a private cloud in parallel, but recently, the concept tends to be vague, so it is sometimes referred to as a combination of cloud (virtual server) and on-premises (physical server). In this case, it has the advantage of combining the flexibility, economics, and speed of the public cloud with the security and stability of a physical server.

As the recent movement to adopt the cloud increases, rather than moving the entire workload to the cloud, the configuration of using the cloud for workloads with unpredictable traffic, such as events or new services, while leaving key data on-premises is increasing.

If you are curious about the advantages of this hybrid cloud, check out the following article as well.