☁Before learning Salesforce.com every one should have an idea about what is Cloud Computing.☁

☁
Cloud Computing is a not a Software or Hardware.☁

☁
It is an concept of accessing an Application, Infrastructure or a Platform over the Internet on demand is called "C Square". ☁

Types of Cloud Services

There are 3 types of Services provided by Cloud

1.Infrastructure As A Service[IAAS]☁

2.Platform As A Service[PAAS]☁

3.Software As A Service[SAAS]☁

1.IAAS: The concept of accessing an Infrastructure such as a storage server (or) an application server is called "IAAS".☁

Examples : (i) Amazon - S3(Simple Storage Service)

(ii) Niravanix - SDN ( Storage Data Network)

(ii) PAAS: The concept of accessing an Platform which can be used to develop Software Applications as a Service over the Internet is called "IAAS".☁

Examples : (i) Force.com by Salesforce.com

(ii) Microsoft Azzure by Microsoft

(iii) Cloud Beans by Amazon

(ii) SAAS: The concept of accessing an Software application such as MS-Office, Time Entry applications as a service is called "IAAS".☁

Examples : (i) Salesforce CRM

(ii) Sugar CRM

(iii) Microsoft Dynamics

(iv) CISCO Webx

Types of Clouds

There are 3 different types of Clouds in ☁Cloud Computing☁:

1.Public Cloud☁

2.Private Cloud☁

3.Hybrid Cloud☁

1.Public Cloud: An environment where a Single resource such as a Storage Server (or) an application Server is shared across multiple people is called "Public Cloud".☁

2.Private Cloud: An environment where a Single resource is shared to only one Organisation & the resource is with in the premises of the organisation is called "Private Cloud".☁

Virtual Private Cloud :It is same like Private Cloud but the resource would be Installed in a Remote Location.☁

3.Hybrid Cloud: This environment is a combination of "Public & Private Clouds" where certain information of an organisation is stored in a Common resource & Certain Information is stored in a dedicated resource.