Types of Cloud Computing

Introduction

• The types of cloud computing are covered under Deployment Model. Deployment model and Service model are the working models for Cloud Computing.
• Cloud computing is feasible and accessible to end users using the deployment model and service model.

Types of Cloud

i) Public cloud

• In the public cloud, systems and services are accessible to the general public. For example, Google, IBM, Microsoft etc.
• Public cloud is open to all. Hence, it may be less secure.
• This cloud is suitable for information which is not sensitive.

• Public cloud is less expensive than the private cloud or hybrid cloud because it shares same resources with many customers.
• It is easy to combine public cloud with private cloud so it gives the flexible approach to the customer.
• It is reliable because it provides large number of resources from various locations and if any resource fails, another is employed.

ii) Private cloud

• In the private cloud, systems and services are accessible within an organization.
• This cloud is operated only in a particular organization. It is managed internally or  by third party.

• Private cloud is highly secured because resources are shared from distinct pool of resources.
• As compared to the Public cloud, Private cloud has more control on its resources and hardware because it accessed only in the boundary of an organization.

• Private cloud is very difficult to deploy globally and it can be accessed locally only.
• Private cloud's cost is more than that of Public cloud.

iii) Hybrid cloud

• Hybrid cloud is a mixture of public and private cloud.
• In hybrid cloud, critical activities are conducted using Private cloud and the non-critical activities are conducted using Public cloud.

• It is scalable because it gives the features of both public and private cloud.
• It gives secure resources because of Private cloud and scalable resources because of Public cloud.
• The cost of the Hybrid cloud is less as compared to Private cloud.

• In hybrid cloud, networking becomes complicated because both Private and Public cloud are available.

iv) Community cloud

• Community cloud enables the system and services which are accessible by group of organizations.
• It shares the infrastructure between several organizations from a specific community.
• It is managed internally and operated by several organizations or by the third party or combination of them.

• In Community cloud, cost is low as compared to Private cloud.
• Community cloud gives an infrastructure to share cloud resources and capabilities between several organizations.
• This cloud is more secure than the Public cloud but less secured than the Private cloud.