A company replaces a number of devices with a mobile appliance, combining several functions.
Which of the following descriptions fits this new implementation? (Select TWO).

A.
Cloud computing

B.
Virtualization

C.
All-in-one device

D.
Load balancing

E.
Single point of failure

Explanation:
The disadvantages of combining everything into one include a potential single point of failure, and the
dependence on the one vendor. The all –in-one device represents a single point of failure risk being taken
on.
Incorrect Answers:
A: Cloud computing refers to 3 service models defined as Software as a Service, Platform as a Service and
Infrastructure as a Service (SaaS, PaaS, and IaaS), and four delivery models (private, public, community,
and hybrid). It also offers ways of cost savings to its tenants being hosted by the cloud. It offers the ability
to decrease costs, increase efficiency, and make the world a better place.
B: Virtualization is the foundation for cloud computing. You cannot have cloud computing without
virtualization. It makes it possible by abstracting the hardware and making it available to the virtual
machines. The abstraction is done through the use of a hypervisor, which can be either Type I (bare
metal) or Type II (hosted).
D: Load balancing is a way of providing high availability by splitting the workload across multiple
computers.

Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis,
2014, pp. 119, 196-202, 235