The Chief Information Officer (CIO) has mandated web based Customer Relationship Management (CRM)
business functions be moved offshore to reduce cost, reduce IT overheads, and improve availability. The
Chief Risk Officer (CRO) has agreed with the CIO’s direction but has mandated that key authentication
systems be run within the organization’s network. Which of the following would BEST meet the CIO and
CRO’s requirements?
A.
Software as a Service
B.
Infrastructure as a Service
C.
Platform as a Service
D.
Hosted virtualization service
Explanation:
Software as a Service (SaaS) is a software distribution model in which applications are hosted by a vendor
or service provider and made available to customers over a network, typically the Internet.
Incorrect Answers:
B: In an IaaS model, a third-party provider hosts hardware, software, servers, storage and other
infrastructure components on behalf of its users. IaaS providers also host users’ applications and handle
tasks including system maintenance, backup and resiliency planning.
C: Platform as a service (PaaS) is a cloud computing model that delivers applications over the Internet. In
a PaaS model, a cloud provider delivers hardware and software tools (usually those needed for
application development) to its users as a service.
D: It is used to provide software development and QA/testing teams access to dependent system
components that are needed to exercise an application under test (AUT), but are unavailable or difficultto-access for development and testing purposes.http://searchcloudcomputing.techtarget.com/definition/Software-as-a-Service
http://searchcloudcomputing.techtarget.com/definition/Infrastructure-as-a-Service-IaaS
http://searchcloudcomputing.techtarget.com/definition/Platform-as-a-Service-PaaS
http://en.wikipedia.org/wiki/Service_virtualization