CISSP best ISC certification exam questions and answers free download

NO.1 What is the MOST important step in business continuity planning?
A. Risk Assessment
B. Due Care
C. Business Impact Analysis (BIA)
D. Due Diligence
Answer: C

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NO.2 Which access control model is also called Non Discretionary Access Control (NDAC)?
A. Lattice based access control
B. Mandatory access control
C. Role-based access control
D. Label-based access control
Answer: C

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NO.3 Compared to RSA, which of the following is true of Elliptic Curve Cryptography(ECC)?
A. It has been mathematically proved to be more secure.
B. It has been mathematically proved to be less secure.
C. It is believed to require longer key for equivalent security.
D. It is believed to require shorter keys for equivalent security.
Answer: D

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Explanation:
The answer: It

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is believed to require shorter keys for equivalent security. Some
experts believe that ECC with key length 160 bits is equivalent to RSA with key length 1024 bits.
The following answers are incorrect: It has been mathematically proved to be less secure. ECC
has not been proved to be more or less secure than RSA. Since ECC is newer than RSA, it is
considered riskier by some, but that is just a general assessment, not based on mathematical
arguments.
It has been mathematically proved to be more secure. ECC has not been proved to be more or
less secure than RSA. Since ECC is newer than RSA, it is considered riskier by some, but that is
just a general assessment, not based on mathematical arguments.
It is believed to require longer key for equivalent security. On the contrary, it is believed to require
shorter keys for equivalent security of RSA.
Shon Harris, AIO v5 pg719 states:
"In most cases, the longer the key, the more protection that is provided, but ECC can provide the
same level of protection with a key size that is shorter that what RSA requires"
The following reference(s) were/was used to create this question:
ISC2 OIG, 2007 p. 258
Shon Harris, AIO v5 pg719

NO.4 Complete the following sentence. A digital signature is a ____
A. hash value that has been encrypted with the senders private key
B. hash value that has been encrypted with the senders public key
C. hash value that has been encrypted with the senders Session key
D. it is senders signature signed and scanned in a digital format
Answer: A

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NO.5 What can be defined as secret communications where the very existence of the message is
hidden?
A. Clustering
B. Steganography
C. Cryptology
D. Vernam cipher
Answer: B

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Explanation:
Steganography is a secret communication where the very existence of the message is hidden. For
example, in a digital image, the least significant bit of each word can be used to comprise a message
without causing any significant change in the image. Key clustering is a situation in which a plaintext
message generates identical ciphertext messages using the same transformation algorithm but with
different keys. Cryptology encompasses cryptography and cryptanalysis. The Vernam Cipher, also
called a one-time pad, is an encryption scheme using a random key of the same size as the message
and is used only once. It is said to be unbreakable, even with infinite resources. Source: KRUTZ,
Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer
Security, John Wiley & Sons, 2001, Chapter 4: Cryptography (page 134).

NO.6 Proxies works by transferring a copy of each accepted data packet from one network to
another, thereby masking the:
A. data's payload.
B. data's details.
C. data's owner.
D. data's origin.
Answer: D

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NO.7 Crime Prevention Through Environmental Design (CPTED) is a discipline that:
A. Outlines how the proper design of a physical environment can reduce crime by directly affecting
human behavior.
B. Outlines how the proper design of the logical environment can reduce crime by directly affecting
human behavior.
C. Outlines how the proper design of the detective control environment can reduce crime by directly
affecting human behavior.
D. Outlines how the proper design of the administrative control environment can reduce crime by
directly affecting human behavior.
Answer: A

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NO.8 Why do buffer overflows happen? What is the main cause?
A. Because buffers can only hold so much data
B. Because of improper parameter checking within the application
C. Because they are an easy weakness to exploit
D. Because of insufficient system memory
Answer: B

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Exam Code: CISSP
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Updated: 11-05,2015
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