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Exam Code: SY0-401
Exam Name: CompTIA Security+ Certification
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SY0-401 Test Answers Total Q&A: 1750 Questions and Answers
Last Update: 12-29,2015

SY0-401 Bootcamp Detail: SY0-401 Test Answers

NO.1 An administrator receives a security alert that appears to be from one of the company's
vendors. The email contains information and instructions for patching a serious flaw that has not
been publicly announced. Which of the following can an employee use to validate the authenticity if
the email?
A. Digital signature
B. Ephemeral Key
C. Private key
D. Hashing algorithm
E. SSL certificate chain
Answer: D

NO.2 A company wants to prevent unauthorized access to its secure data center. Which of the
following security controls would be MOST appropriate?
A. Motion detector
B. Alarm to local police
C. Security guard
D. Camera
Answer: C

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NO.3 An administrator is configuring a new Linux web server where each user account is confined to
a cheroot jail. Which of the following describes this type of control?
A. SysV
B. Sandbox
C. Segmentation
D. Zone
Answer: B

NO.4 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. A host standby
C. RAID
D. A cold site
Answer: C

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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.

NO.5 Which statement is TRUE about the operation of a packet sniffer?
A. The Ethernet card must be placed in promiscuous mode.
B. It must be placed on a single virtual LAN interface.
C. They are required for firewall operation and stateful inspection.
D. It can only have one interface on a management network.
Answer: A

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Explanation:
A sniffer (packet sniffer) is a tool that intercepts data flowing in a network. If computers are
connected to a local area network that is not filtered or switched, the traffic can be broadcast to all
computers contained in the same segment. This doesn't generally occur, since computers are
generally told to ignore all the comings and goings of traffic from other computers. However, in the
case of a sniffer, all traffic is shared when the sniffer software commands the Network Interface Card
(NIC) to stop ignoring the traffic. The NIC is put into promiscuous mode, and it reads communications
between computers within a particular segment. This allows the sniffer to seize everything that is
flowing in the network, which can lead to the unauthorized access of sensitive data. A packet sniffer
can take the form of either a hardware or software solution. A sniffer is also known as a packet
analyzer.

NO.6 Which of the following BEST describes a SQL Injection attack?
A. The attacker overwhelms a system or application, causing it to crash, and then redirects the
memory address to read from a location holding the payload.
B. The attacker overwhelms a system or application, causing it to crash and bring the server down to
cause an outage.
C. The attacker attempts to have the receiving server pass information to a back-end database from
which it can compromise the stored information.
D. The attacker attempts to have the receiving server run a payload using programming commonly
found on web servers.
Answer: C

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Explanation:
SQL injection is a code injection technique, used to attack data-driven applications, in which
malicious SQL statements are inserted into an entry field for execution (e.g. to dump the database
contents to the attacker). SQL injection must exploit a security vulnerability in an application's
software, for example, when user input is either incorrectly filtered for string literal escape characters
embedded in SQL statements or user input is not strongly typed and unexpectedly executed. SQL
injection is mostly known as an attack vector for websites but can be used to attack any type of SQL
database.

NO.7 Which of the following provides data the best fault tolerance at the LOWEST cost?
A. RAID 6
B. Server virtualization
C. Clustering
D. Load balancing
Answer: A

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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
thus representing the lowest cost option.

NO.8 DRAG DROP
A forensic analyst is asked to respond to an ongoing network attack on a server. Place the items in
the list below in the correct order in which the forensic analyst should preserve them.
Answer:
Explanation:
When dealing with multiple issues, address them in order of volatility (OOV); always deal with the
most volatile first. Volatility can be thought of as the amount of time that you have to collect certain
data before a window of opportunity is gone. Naturally, in an investigation you want to collect
everything, but some data will exist longer than others, and you cannot possibly collect all of it
once. As an example, the OOV in an investigation may be RAM, hard drive data, CDs/DVDs, and
printouts.
Order of volatility: Capture system images as a snapshot of what exists, look at network traffic and
logs, capture any relevant video/screenshots/hashes, record time offset on the systems, talk to
witnesses, and track total man-hours and expenses associated with the investigation.
References:
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex,
Indianapolis, 2014, p. 453

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