What is cloud computing?
"Cloud" is actually a metaphor for the Internet, the "cloud computing" is actually use the internet to access applications running on remote storage or server, data, or services. Any use Internet-based computing, storage and development company, can be called technically in a cloud of company.
Popular explanation IAAS, SAAS, PASS is?
IAAS, SAAS, PASS concept?
Iaas (Infrastructure as a Service Infrastructure as a Service)
IaaS is dedicated to providing infrastructure services, IaaS company will provide off-site servers, storage and networking hardware, you can rent. Saves maintenance costs and office space, the company can take advantage of these hardware at any time to run their applications. IaaS some large companies, including Amazon, Microsoft, VMWare, Rackspace and Red Hat. But these companies in turn have their own expertise, not only IaaS such as Amazon and Microsoft to provide you with, they will be rented to you to computing power host your site.
Paas (Platform as a Service Platform-as-a-Service) large column in the cloud IAAS, PASS, SAAS difference trong>
The second layer is called PaaS, sometimes also known as middleware. You all development can be carried out at this level, saving time and resources. PaaS company offers a variety of online solutions for developing and distributing applications, such as virtual servers and operating systems. This saves you the cost of the hardware, but also to cooperation between the dispersed studio easier. Web application management, application design, application hosting, storage, security, collaboration and application development tools. Some large PaaS providers have Google App Engine, Microsoft Azure, Force.com, Heroku, Engine Yard. The recent rise of the company AppFog, Mendix and Standing Cloud.
Saas (Software as a Service Software-as-a-Service)
The third layer is the so-called SaaS. This layer is a layer in contact with your life every day, mostly to access via a web browser. Any application on a remote server can be run over the network, it is a SaaS. Your consumer services such as Netflix entirely from the web, MOG, Google Apps, Box.net, Dropbox or Apple's iCloud there into these categories. Although these web services are used for business and pleasure or both, but it can be considered part of cloud technology. Some used as SaaS business applications including Citrix's Go To Meeting, Cisco's WebEx, Salesforce's CRM, ADP, Workday and SuccessFactors.