Which of the following access control models are used in the commercial sector?
Each correct answer represents a complete solution. Choose two.
A. Clark-Biba model
B. Clark-Wilson model
C. Bell-LaPadula model
D. Biba model
D and B
Explanation: The Biba and Clark-Wilson access control models are used in the commercial sector.
The Biba model is a formal state transition system of computer security policy that describes a set of
access control rules designed to ensure data integrity. Data and subjects are grouped into ordered
levels of integrity. The model is designed so that subjects may not corrupt data in a level ranked
higher than the subject, or be corrupted by data from a lower level than the subject.
The Clark-Wilson security model provides a foundation for specifying and analyzing an integrity
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policy for a computing system.
Answer option C is incorrect. The Bell-LaPadula access control model is mainly used in military
systems.
Answer option A is incorrect. There is no such access control model as Clark-Biba.
Reference: "http.//en.wikipedia.org/wiki/Biba"
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In which of the following mechanisms does an authority, within limitations, specify what objects can
be accessed by a subject?
A. Role-Based Access Control
B. Discretionary Access Control
C. Task-based Access Control
D. Mandatory Access Control
B
Explanation:
In the discretionary access control, an authority, within limitations, specifies what objects can be
accessed by a subject.
Answer option D is incorrect. In the mandatory access control, a subject's access to an object is
dependent on labels.
Answer option A is incorrect. In the role-based access control, a central authority determines what
individuals can have access to which objects based on the individual's role or title in the
organization.
Answer option C is incorrect. The task-based access control is similar to role-based access control,
but the controls are based on the subject's responsibilities and duties.
Reference: CISM Review Manual 2010, Contents. "Information Security Governance"
You work as the Senior Project manager in Dotcoiss Inc. Your company has started a software project
using configuration management and has completed 70% of it. You need to ensure that the network
infrastructure devices and networking standards used in this project are installed in accordance with
the requirements of its detailed project design documentation. Which of the following procedures
will you employ to accomplish the task?
A. Configuration identification
B. Physical configuration audit
C. Configuration control
D. Functional configuration audit
B
Explanation:
Physical Configuration Audit (PCA) is one of the practices used in Software Configuration
Management for Software Configuration Auditing. The purpose of the software PCA is to ensure that
the design and reference documentation is consistent with the as-built software product. PCA checks
and matches the really implemented layout with the documented layout.
Answer option D is incorrect. Functional Configuration Audit or FCA is one of the practices used in
Software Configuration Management for Software Configuration Auditing. FCA occurs either at
delivery or at the moment of effecting the change. A Functional Configuration Audit ensures that
functional and performance attributes of a configuration item are achieved.
Answer option C is incorrect. Configuration control is a procedure of the Configuration management.
Configuration control is a set of processes and approval stages required to change a configuration
item's attributes and to re-baseline them. It supports the change of the functional and physical
attributes of software at various points in time, and performs systematic control of changes to the
identified attributes.
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Answer option A is incorrect. Configuration identification is the process of identifying the attributes
that define every aspect of a configuration item. A configuration item is a product (hardware and/or
software) that has an end-user purpose. These attributes are recorded in configuration
documentation and baselined. Baselining an attribute forces formal configuration change control
processes to be effected in the event that these attributes are changed.
Which of the following can be done over telephone lines, e-mail, instant messaging, and any other
method of communication considered private.
A. Shielding
B. Spoofing
C. Eavesdropping
D. Packaging
C
Explanation:
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Eavesdropping is the process of listening in private conversations. It also includes attackers listening
in on the network traffic. For example, it can be done over telephone lines (wiretapping), e-mail,
instant messaging, and any other method of communication considered private.
Answer option B is incorrect. Spoofing is a technique that makes a transmission appear to have come
from an authentic source by forging the IP address, email address, caller ID, etc. In IP spoofing, a
hacker modifies packet headers by using someone else's IP address to hide his identity. However,
spoofing cannot be used while surfing the Internet, chatting on-line, etc. because forging the source
IP address causes the responses to be misdirected.
Answer option A is incorrect. Shielding cannot be done over e-mail and instant messaging. Shielding
is a way of preventing electronic emissions that are generated from a computer or network from
being used by unauthorized users for gathering confidential information. It minimizes the chances of
eavesdropping within a network. Shielding can be provided by surrounding a computer room with a
Farady cage. A Farady cage is a device that prevents electromagnetic signal emissions from going
outside the computer room. Shielding can also protect wireless networks from denial of service
(DoS) attacks.
Answer option D is incorrect. Packaging is a process in which goods are differentiated on the basis of
the container in which they are stored, such as bottles, boxes, bags, etc.
Reference: "http.//en.wikipedia.org/wiki/Eavesdropping"
Which of the following concepts represent the three fundamental principles of information security?
Each correct answer represents a complete solution. Choose three.
A. Confidentiality
B. Integrity
C. Availability
D. Privacy
A, B, and C
Explanation:
The following concepts represent the three fundamental principles of information security.
1.Confidentiality
2.Integrity
3.Availability
Answer option C is incorrect. Privacy, authentication, accountability, authorization and identification
are also concepts related to information security, but they do not represent the fundamental
principles of information security.
Reference: "http.//en.wikipedia.org/wiki/Information_security"
Which of the following plans is designed to protect critical business processes from natural or man-
made failures or disasters and the resultant loss of capital due to the unavailability of normal
business processes?
A. Business continuity plan
B. Crisis communication plan
C. Contingency plan
D. Disaster recovery plan
A
Explanation:
The business continuity plan is designed to protect critical business processes from natural or man-
made failures or disasters and the resultant loss of capital due to the unavailability of normal
business processes.
Business Continuity Planning (BCP) is the creation and validation of a practiced logistical plan for
how an organization will recover and restore partially or completely interrupted critical (urgent)
functions within a predetermined time after a disaster or extended disruption. The logistical plan is
called a business continuity plan.
Answer option B is incorrect. The crisis communication plan can be broadly defined as the plan for
the exchange of information before, during, or after a crisis event. It is considered as a sub-specialty
of the public relations profession that is designed to protect and defend an individual, company, or
organization facing a public challenge to its reputation.
The aim of crisis communication plan is to assist organizations to achieve continuity of critical
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business processes and information flows under crisis, disaster or event driven circumstances.
Answer option C is incorrect. A contingency plan is a plan devised for a specific situation when things
could go wrong. Contingency plans are often devised by governments or businesses who want to be
prepared for anything that could happen. Contingency plans include specific strategies and actions to
deal with specific variances to assumptions resulting in a particular problem, emergency, or state of
affairs. They also include a monitoring process and "triggers" for initiating planned actions. They are
required to help governments, businesses, or individuals to recover from serious incidents in the
minimum time with minimum cost and disruption.
Answer option D is incorrect. A disaster recovery plan should contain data, hardware, and software
that can be critical for a business. It should also include the plan for sudden loss such as hard disc
crash. The business should use backup and data recovery utilities to limit the loss of data.
Reference: CISM Review Manual 2010, Contents. "Incident Management and Response"
Which of the following models uses a directed graph to specify the rights that a subject can transfer
to an object or that a subject can take from another subject?
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A. Take-Grant Protection Model
B. Bell-LaPadula Model
C. Biba Integrity Model
D. Access Matrix
A
Explanation:
The take-grant protection model is a formal model used in the field of computer security to establish
or disprove the safety of a given computer system that follows specific rules. It shows that for
specific systems the question of safety is decidable in linear time, which is in general undecidable.
The model represents a system as directed graph, where vertices are either subjects or objects. The
edges between them are labeled and the label indicates the rights that the source of the edge has
over the destination. Two rights occur in every instance of the model. take and grant. They play a
special role in the graph rewriting rules describing admissible changes of the graph.
Answer option D is incorrect. The access matrix is a straightforward approach that provides access
rights to subjects for objects.
Answer option B is incorrect. The Bell-LaPadula model deals only with the confidentiality of classified
material. It does not address integrity or availability.
Sarah has created a site on which she publishes a copyrighted material. She is ignorant that she is
infringing copyright. Is she guilty under copyright laws?
A. No
B. Yes
B
Explanation:
Sarah is guilty under copyright laws because pleading ignorance of copyright infringement is not an
excuse.
What is copyright?
A copyright is a form of intellectual property, which secures to its holder the exclusive right to
produce copies of his or her works of original expression, such as a literary work, movie, musical
work or sound recording, painting, photograph, computer program, or industrial design, for a
defined, yet extendable, period of time. It does not cover ideas or facts. Copyright laws protect
intellectual property from misuse by other individuals.
Reference: "http.//en.wikipedia.org/wiki/Copyright"
An organization monitors the hard disks of its employees' computers from time to time. Which policy
does this pertain to?
A. Network security policy
B. Backup policy
C. Privacy policy
D. User password policy
C
Explanation:
Monitoring the computer hard disks or e-mails of employees pertains to the privacy policy of an
organization.
Answer option B is incorrect. The backup policy of a company is related to the backup of its data.
Answer option A is incorrect. The network security policy is related to the security of a company's
network.
Answer option D is incorrect. The user password policy is related to passwords that users provide to
log on to the network.
Which of the following is a name, symbol, or slogan with which a product is identified?
A. Copyright
B. Trademark
C. Trade secret
D. Patent
B
Explanation:
A trademark is a name, symbol, or slogan with which a product is identified. Its uniqueness makes
the product noticeable among the same type of products. For example, Pentium and Athlon are
brand names of the CPUs that are manufactured by Intel and AMD, respectively.
The trademark law protects a company's trademark by making it illegal for other companies to use it
without taking prior permission of the trademark owner. A trademark is registered so that others
cannot use identical or similar marks.
Answer option C is incorrect. A trade secret is a formula, practice, process, design, instrument,
pattern, or compilation of information which is not generally known. It helps a business to obtain an
economic advantage over its competitors or customers. In some jurisdictions, such secrets are
referred to as confidential information or classified information.
Answer option A is incorrect. A copyright is a form of intellectual property, which secures to its
holder the exclusive right to produce copies of his or her works of original expression, such as a
literary work, movie, musical work or sound recording, painting, photograph, computer program, or
industrial design, for a defined, yet extendable, period of time. It does not cover ideas or facts.
Copyright laws protect intellectual property from misuse by other individuals.
Answer option D is incorrect. A patent is a set of exclusive rights granted to anyone who invents any
new and useful machine, process, composition of matter, etc. A patent enables the inventor to
legally enforce his right to exclude others from using his invention.
Reference: "http.//en.wikipedia.org/wiki/Trademark"
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