CompTIA Security Plus Mock Test Q414

Jane has implemented an array of four servers to accomplish one specific task. This is BEST known as which of the following?

A. Clustering
C. Load balancing
D. Virtualization

Correct Answer: A
Section: Compliance and Operational Security

Anytime you connect multiple computers to work/act together as a single server, it is known as clustering. Clustered systems utilize parallel processing (improving performance and availability) and add redundancy (but also add costs).
Incorrect Answers:
B: RAID, or redundant array of independent disks (RAID). RAID allows your existing servers to have more than one hard drive so that if the main hard drive fails, the system keeps functioning.
C: Load balancing is a way of providing high availability by splitting the workload across multiple computers.
D: 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).
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis, 2014, pp. 234-235