What is Cloud Computing(CC)?

By Prempal Singh 0 Comment April 4, 2017  amazone cloud, cloud computer, cloud computing amazone, cloud computing business, cloud computing definition, cloud computing pdf, cloud computing ppt, cloud computing security, cloud computing service, cloud computing services, cloud computing software, cloud computing technology, cloud definition, cloud security, cloud services, cloud storage, cloud technology, free cloud computing, google cloud, google cloud computing, the cloud, what is cloud, what is cloud computing, what is the cloud, what is the cloud computing

Cloud computing is an internet-based computing that provides shared computer processing resources and data to computers and another device on demand.The goal is to allow a user to take benefit from all of the technologies, without the need for deep knowledge.The cloud aims to cut cost and helps the users focus on their core business instead of being impeded by IT obstacle.

History of cloud computing:

• 1960’s: John McCarthy introduces mainframe time sharing.
• 1969: ARPANET has introduced by J.C.R. Licklider.
• 1970: Virtualization software has been launched.
• 1991: World Wide Web(WWW) has been launched.
• 1997: Cloud Computing has defined by professor Ramnath Chellappa.
• 1999: Salesforce has been defined.
• 2006: Amazone launched Elastic Compute Cloud(EC2), Simple Storage Services(S3).
• 2013: WorldWide public Cloud services market has launched.
• 2014: Estimated global cloud spending.

Ther are lots of characteristics of Cloud Computing are as follows:

• Cost: The reductions of cost are claimed by cloud providers.
• Maintenance: It is easier for cloud computing.
• Performance: It is monitored by IT experts.
• Reliability improves with the use of multiple redundant sites.
• Security: It can improve due to a centralization of data.
• Agility: The organizations may be improved.
• Productivity: It may be increased when multiple users can work simultaneously.
• Multitenancy: It enables sharing of resources and costs across a large pool of users.
• Devices and location independence: It enables users to access system using a web browser regardless of their location or devices they used.

Service Model:

There are three types of services are as follows:

1. Software As a Service(SaaS):

The capability provided to a consumer to use a running application on infrastructure. Cloud users do not manage the cloud infrastructure and platform where the application runs. The consumer doesn’t manage or control the underlying cloud infrastructure including network, servers, operating systems, storage, or even individual application capabilities, with the possible exception of limited user-specific application configuration settings.

Examples: Amazon EC2, Windows Azure, Rackspace, Google Compute Engine etc.

2. Platform As a Service(PaaS):

The capability provided to a consumer to deploy onto the infrastructure created using languages, libraries, services & tools. The consumer doesn’t manage or control the underlying cloud infrastructure including network, servers, operating systems, or storage, but has control over the deployed applications and possibly configuration settings for the application-hosting environment.

Examples: Microsoft Azure, Salesforce Heroku.

3. Infrastructure As a Service(Iaas):

The capability provided to a consumer is to provision processing, storage, networks and other resources where the consumer is able to deploy and run the software. The consumer doesn’t manage or control the underlying cloud infrastructure but has control over operating systems, storage, and deployed applications and possibly limited control of select networking components.

Example:  Host firewalls etc.

Deployment Model:

There are three types of deployment models are as follows:

1. Private Cloud:
It is cloud infrastructure operated solely for a single organization. Undertaking a private cloud project requires to virtualized to the business environment and to reevaluate decisions. It has a significant physical footprint, requiring allocations of space, hardware, and environmental controls.

2. Public or Community Cloud:
It is a used when the services are rendered over a network  i.e. open for public use. A public provider like AWS, Microsoft, and Google operate the infrastructure at their data center and access to the internet.
AWS and Microsoft also offer direct connect services called “AWS Direct Connect” and “Azure ExpressRoute”  such connections require customers to purchase or contract a private connection to a peering point offered by the cloud provider.

3. Hybrid Cloud:

It is a combination of two or more clouds (private, public or community) that remain distinct entity but are bound together. A hybrid cloud service crosses isolation and provider boundaries so that it can’t be simply put in a category of private, public, or community cloud service. It allows one to extend either the capability of a cloud service, by aggregation, integration or customization with another cloud service.

Cloud Security:

• CC possess privacy concern because the provider can access the data anytime and accidently and deliberately alter and delete.
• Providers can share information with third parties if necessary for purposes of the law that policy a user agree to before using cloud services.

According to cloud services alliance top 3 threats –

 1. Data loss (25%):

2. Hardware failure (10%)

3. Insecure interface (29%)

Limitations And Disadvantages:

• Cloud users are limited to the control and management of their applications, data, and services.
• Connectivity to the cloud is a pre-requisite of cloud computing.
• CC assumes that there is enough bandwidth to collect the data.
  Speed/lack of internet can affect work method in the cloud.

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