Question

The textbook discusses three fundamental cloud types: SaaS, PaaS, and laas. Consider the advantages and disadvantages of each type. In a scenario where you are the CIO of a public university, which type of cloud service would you have your university subscribe to for the following systems and why?: 1. Lecture videos (for student viewing) 2. E-Mail (used by employees and students) 3. Financial records 4. Student records Search entries orauthoror. O:o:,:,,.Unread Reply Replies are only visible to those who have posted at least one reply earch

Answer 1

	SaaS	PaaS	IaaS
Definition	SaaS providers host an application which is available to users through the internet	PaaS is a cloud computing offering that provides users with a cloud environment in which they can develop, manage and deliver applications.	IaaS providers enable users to spin up virtual machines
Example	Salesforce	Apache Stratos	Amazon Web Services
Characteristics	Centralized management Easy access Remote hosting	Scalable Availability Automates business policy Cost effective Hybrid environment	Pay-as-you-use Flexibility Complete control of the infrastructure
When to use	Startups with short-term projects which needs both web and mobile based hosting	For creating customized application without worrying about the platform	When you want to have complete control over application and the infrastructure

1. Lecture Videos: IaaS, because this requires servers to control access to lecture videos and also storage and networking devices to store videos. Also if count of videos increases, infrastructure can also be increased in IaaS as it supports “pay-as-you-use”
2. E-mail: Saas, email service can be provided as a web/mobile application
3. Financial Records: IaaS, for storage and querying on the records
4. Student Records: IaaS, for storage and querying on the records