Explain cloud computing reference model .

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 CLOUD COMPUTING REFERENCE MODEL

The cloud computing reference model is a general high-level architecture and is meant for a cloud computing reference architecture provided, which outlines the primary performer/actor and the understanding of the cloud computing needs, uses, features, and standards. An overview of the NIST primary players, as indicated in the figure below. Each performer is an entity that might be a person or a cloud computing activity and role. The NIST cloud computing reference architecture identifies five organization that takes part in a transaction or process and complete duties in cloud computing.




1. Cloud consumer: 

The cloud consumer is the cloud computing service's most significant stakeholder. A cloud consumer is a person or organization who has a commercial connection with a cloud provider and consumes its services. A cloud consumer browses a cloud provider's service catalog, requests the right service, establishes service contracts with the cloud provider, and consumes the service. The cloud consumer may be invoiced for the service provided and must make payment arrangements appropriately.


2. Cloud Provider: 

A cloud provider is a person or an organization that is responsible for making a service available to interested parties. A cloud provider purchases and administers the computer equipment necessary to supply the services, operates the cloud software that offers the services, and arranges for the cloud services to be delivered to cloud consumers via network access. In the case of Software as a Service, the cloud provider deploys, configures, maintains, and upgrades the functioning of software applications on cloud infrastructure so that the services are provided to cloud consumers at the required service levels.



3. Cloud Auditor: 

A cloud auditor is a party who can do an impartial analysis of cloud service controls to provide an opinion on them. Audits are carried out to ensure that standards are met by reviewing objective evidence. A cloud auditor can assess a cloud provider's services in terms of security measures, privacy implications, performance, and so on.


4. Cloud broker: 

As cloud computing advances, cloud service integration may become too difficult for cloud users to maintain. Instead of contacting a cloud provider directly, a cloud user might request cloud services using a cloud broker. A cloud broker is a company that handles the usage, performance, and delivery of cloud services and negotiates contracts between cloud providers and cloud users.


5.  Cloud carrier: 

A cloud carrier operates as a middleman between cloud users and cloud providers, providing connectivity and transfer of cloud services. Cloud carriers give users access via a network, telecommunication, and other access devices. Cloud users, for example, can access cloud services via network access devices such as PCs, laptops, mobile phones, mobile Internet devices, and so on.


The interaction between the performers is depicted in the figure below. A cloud consumer can request cloud services directly from a cloud provider or through a cloud broker. A cloud auditor does independent audits and may contact others to get information.






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