CompTIA Security Plus Mock Test Q458

Matt, a security consultant, has been tasked with increasing server fault tolerance and has been given no budget to accomplish his task. Which of the following can Matt implement to ensure servers will withstand hardware failure?

A. Hardware load balancing
C. A cold site
D. A host standby

Correct Answer: B
Section: Compliance and Operational Security

Fault tolerance is the ability of a system to sustain operations in the event of a component failure. Fault-tolerant systems can continue operation even though a critical component, such as a disk drive, has failed. This capability involves overengineering systems by adding redundant components and subsystems. RAID can achieve fault tolerance using software which can be done using the existing hardware and software.

Incorrect Answers:
A: Balancing the load between multiple servers instead of relying on only one reduces the response time, maximizes throughput, and allows better allocation of resources. It does not mean withstanding hardware failure, it just means high availability. It also adds costs and there is no budget.
C: A cold site is a facility that isn’t immediately ready to use. The organization using it must bring along its equipment and network. A cold site may provide network capability, but this isn’t usually the case; the site provides a place for operations to resume, but it doesn’t provide the infrastructure to support those operations. Thus no servers fault tolerance as is required.
D: A Host standby assumes that you need to purchase additional servers to act as a standby.

Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis, 2014, pp. 33, 103, 444