SaaS: Advantages Reduce or dispose of need for on site data middle Pay as you go model, no big up front investment in both hardware or application Scalability in number of servers, amount of garage, etc. Device independent access programming help applications Improved catastrophe recovery, less interruption, preferably but what about Google outages?NIST Working Definition of Cloud Computing Deployment Models Delivery Models Essential Characteristics: what facets need to cloud users predict?Enabling Technologies On demand self provider: patrons can purchase computing device technology help necessary computational elements without having programming help engage with human service suppliers. Ubiquitous community access: cloud elements dont require special instruments laptops, cellphone telephones, etc. are commonly supported. Resource pooling: cloud elements are pooled programming help serve many customers using a multi tenant model, with various actual and digital elements Rapid elasticity: resources may also be allotted and de allocated quickly as vital. Measured service: resource use is measured and monitored; expenses are made based on usage and repair type e.