Page 176 - Cloud Essentials

A. backup, disaster recovery

B. SLAs, SaaS
C. virtualization, PaaS

D. time to market, reduced CAPEX

A. Backup and disaster recovery are critically important to any

business using any type of IT solution, not just cloud customers.
B, C, and D are incorrect. SaaS and PaaS are specific to cloud
computing. Time to market and CAPEX are not IT considerations; they
are business strategy and financial considerations.

19. Which statement regarding private clouds is true?

A. SLAs are not required.
B. Server virtualization is used only in public clouds.

C. They are more secure than public clouds.

D. They are for the exclusive use of a single organization.

D. Private clouds use computing assets owned by, and for the
exclusive use by, a single organization.
A, B, and C are incorrect. Private clouds still use SLAs to
guarantee levels of service to business units. The use of server

virtualization is not exclusive to public clouds. Public cloud providers
generally have more resources, have more expertise, and must pass
frequent third-party audits. This suggests public cloud providers must
exercise the strictest security standards.

20. Numerous cloud customers sharing the same computing services while
having isolated computing environments is described as which of the
following?

A. Multitenancy

B. Elasticity
C. Virtualization

D. XaaS

A. Multitenancy allows multiple cloud customers to use the same
computing services such as cloud mailboxes, but the cloud provider
ensures each cloud customer is kept isolated from another.

B, C, and D are incorrect. Elasticity refers to the ease with which

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