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
B. RAID
C. A cold site
D. A host standby

Correct Answer: B
Section: Compliance and Operational Security

Explanation:
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.

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

CompTIA Security Plus Mock Test Q408

Which of the following may significantly reduce data loss if multiple drives fail at the same time?

A. Virtualization
B. RAID
C. Load balancing
D. Server clustering

Correct Answer: B
Section: Compliance and Operational Security

Explanation:
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.
Incorrect Answers:
A: Virtualization is the foundation for cloud computing. 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); not at all reducing data loss in case multiple drives fail.
C: Load balancing is a way of providing high availability by splitting the workload across multiple computers; however it does not reduce data loss in case multiple drives happen to fail.
D: 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).

References:
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis, 2014, pp. 234-235

CompTIA Security Plus Mock Test Q407

A small business needs to incorporate fault tolerance into their infrastructure to increase data availability. Which of the following options would be the BEST solution at a minimal cost?

A. Clustering
B. Mirrored server
C. RAID
D.Tape backup


Correct Answer: C
Section: Compliance and Operational Security

Explanation:
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. RAID can achieve fault tolerance using software which can be done using the existing hardware and software.

Incorrect Answers:
A: 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).
B: Mirrored server implies that you have a mirror / duplicate of the server which will provide you with 100 % redundancy, but it does not represent the least cost option.
D: Tape Backup will also incur costs and is means for backing up data to mitigate a loss.

References:
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis, 2014, pp. 34, 234, 235