COPYRIGHT EXAM FORMAT, EXAM VCE COPYRIGHT FREE

copyright Exam Format, Exam Vce copyright Free

copyright Exam Format, Exam Vce copyright Free

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ISC copyright Security Professional (copyright) Sample Questions (Q819-Q824):

NEW QUESTION # 819
Which standard below does NOT specify fiber optic cabling as its
physical media?

  • A. 1000BaseCX
  • B. 1000BaseLX
  • C. 100BaseFX
  • D. 1000BaseSX

Answer: A

Explanation:
1000BaseCX refers to 1000Mbps baseband copper cable, using two pairs of 150 ohm balanced cable for CSMA/CD LANs.
* 100BaseFX, specifies a 100 Mbps baseband fiber optic CSMA/CD LAN. Answer c, 1000BaseLX, specifies a 1000Mbps CSMA/CD LAN over long wavelength fiber optics.
* 1000BaseSX, specifies a 1000Mbps CSMA/CD LAN over short wavelength fiber optics.


NEW QUESTION # 820
Which of the following terms can be described as the process to conceal data into another file or media in a practice known as security through obscurity?

  • A. NTFS ADS
  • B. ADS - Alternate Data Streams
  • C. Encryption
  • D. Steganography

Answer: D

Explanation:
It is the art and science of encoding hidden messages in such a way that no one, apart from the sender and intended recipient, suspects the existence of the message or could claim there is a message.
It is a form of security through obscurity.
The word steganography is of Greek origin and means "concealed writing." It combines the
Greek words steganos (), meaning "covered or protected," and graphei () meaning
"writing."
The first recorded use of the term was in 1499 by Johannes Trithemius in his
Steganographia, a treatise on cryptography and steganography, disguised as a book on magic. Generally, the hidden messages will appear to be (or be part of) something else:
images, articles, shopping lists, or some other cover text. For example, the hidden message may be in invisible ink between the visible lines of a private letter.
The advantage of steganography over cryptography alone is that the intended secret message does not attract attention to itself as an object of scrutiny. Plainly visible encrypted messages, no matter how unbreakable, will arouse interest, and may in themselves be incriminating in countries where encryption is illegal. Thus, whereas cryptography is the practice of protecting the contents of a message alone, steganography is concerned with concealing the fact that a secret message is being sent, as well as concealing the contents of the message.
It is sometimes referred to as Hiding in Plain Sight. This image of trees blow contains in it another image of a cat using Steganography.

ADS Tree with Cat inside
This image below is hidden in the picture of the trees above:

Hidden Kitty
As explained here the image is hidden by removing all but the two least significant bits of each color component and subsequent normalization.
ABOUT MSF and LSF
One of the common method to perform steganography is by hiding bits within the Least
Significant Bits of a media (LSB) or what is sometimes referred to as Slack Space. By modifying only the least significant bit, it is not possible to tell if there is an hidden message or not looking at the picture or the media. If you would change the Most Significant Bits
(MSB) then it would be possible to view or detect the changes just by looking at the picture.
A person can perceive only up to 6 bits of depth, bit that are changed past the first sixth bit of the color code would be undetectable to a human eye.
If we make use of a high quality digital picture, we could hide six bits of data within each of the pixel of the image. You have a color code for each pixel composed of a Red, Green, and Blue value. The color code is 3 sets of 8 bits each for each of the color. You could change the last two bit to hide your data. See below a color code for one pixel in binary format. The bits below are not real they are just example for illustration purpose:
RED GREEN BLUE
0101 0101 1100 1011 1110 0011
MSB LSB MSB LSB MSB LSB
Let's say that I would like to hide the letter A uppercase within the pixels of the picture. If we convert the letter "A" uppercase to a decimal value it would be number 65 within the
ASCII table , in binary format the value 65 would translet to 01000001
You can break the 8 bits of character A uppercase in group of two bits as follow: 01 00 00
01
Using the pixel above we will hide those bits within the last two bits of each of the color as follow:
RED GREEN BLUE
0101 0101 1100 1000 1110 0000
MSB LSB MSB LSB MSB LSB
As you can see above, the last two bits of RED was already set to the proper value of 01, then we move to the GREEN value and we changed the last two bit from 11 to 00, and finally we changed the last two bits of blue to 00. One pixel allowed us to hide 6 bits of data. We would have to use another pixel to hide the remaining two bits.
The following answers are incorrect:
- ADS - Alternate Data Streams: This is almost correct but ADS is different from steganography in that ADS hides data in streams of communications or files while
Steganography hides data in a single file.
- Encryption: This is almost correct but Steganography isn't exactly encryption as much as using space in a file to store another file.
- NTFS ADS: This is also almost correct in that you're hiding data where you have space to do so. NTFS, or New Technology File System common on Windows computers has a feature where you can hide files where they're not viewable under normal conditions. Tools are required to uncover the ADS-hidden files.
The following reference(s) was used to create this question:
Steganography tool
and
http://en.wikipedia.org/wiki/Steganography


NEW QUESTION # 821
Which of the following is a network intrusion detection technique?

  • A. Perimeter intrusion
  • B. Network spoofing
  • C. Port scanning
  • D. Statistical anomaly

Answer: C


NEW QUESTION # 822
Which of the following adds end-to-end security inside a Layer 2 Tunneling Protocol (L2TP) Internet Protocol Security (IPSec) connection?

  • A. Secure Hash Algorithm (SHA)
  • B. Temporal Key Integrity Protocol (TKIP)
  • C. Secure Shell (SSH)
  • D. Transport Layer Security (TLS)

Answer: D

Explanation:
According to the copyright CBK Official Study Guide1, the protocol that adds end-to-end security inside a Layer
2 Tunneling Protocol (L2TP) Internet Protocol Security (IPSec) connection is Transport Layer Security (TLS).
L2TP is a tunneling protocol that is used or applied to create or establish a virtual private network (VPN) connection between two or more systems or networks, by using or applying the Layer 2 or the data-link layer of the Open System Interconnection (OSI) Reference Model, which is the layer that defines the logical or the intangible aspects of the communication or the networking system, such as the frames, addresses, or protocols that organize or control the data or the information. IPSec is a security protocol that is used or applied to secure or protect the VPN connection between two or more systems or networks, by using or applying the Layer 3 or the network layer of the OSI Reference Model, which is the layer that defines the routing or the forwarding aspects of the communication or the networking system, such as the packets, addresses, or protocols that determine or direct the path or the route of the data or the information. IPSec helps to ensure the security or the integrity of the VPN connection between two or more systems or networks, by providing or supporting the confidentiality, integrity, authentication, or non-repudiation of the data or the information that passes through the VPN connection, by using or applying the appropriate methods or mechanisms, such as the encryption, hashing, digital signature, or key exchange of the data or the information. TLS is a security protocol that is used or applied to secure or protect the application or the service that runs or operates inside the VPN connection between two or more systems or networks, by using or applying the Layer 4 or the transport layer of the OSI Reference Model, which is the layer that defines the reliability or the quality aspects of the communication or the networking system, such as the segments, ports, or protocols that ensure or verify the delivery or the transmission of the data or the information. TLS helps to ensure the security or the integrity of the application or the service that runs or operates inside the VPN connection between two or more systems or networks, by providing or supporting the confidentiality, integrity, authentication, or non-repudiation of the data or the information that passes through the application or the service, by using or applying the appropriate methods or mechanisms, such as the encryption, hashing, digital signature, or key exchange of the data or the information. TLS adds end-to-end security inside the L2TP IPSec connection, as it provides or supports an additional layer or level of security or protection to the data or the information that passes through the VPN connection between two or more systems or networks, as well as the application or the service that runs or operates inside the VPN connection between two or more systems or networks, by securing or protecting the data or the information from the source or the origin to the destination or the end of the VPN connection, as well as the application or the service, regardless or irrespective of the intermediate or the intermediate systems or networks that are involved or included in the VPN connection, as well as the application or the service.
TKIP is not the protocol that adds end-to-end security inside the L2TP IPSec connection, although it may be a benefit or a consequence of using TLS.


NEW QUESTION # 823
Which of the following is used to interrupt the opportunity to use or perform collusion to subvert operation for fraudulent purposes?

  • A. Principle of need-to-know
  • B. Key escrow
  • C. Principle of least privilege
  • D. Rotation of duties

Answer: D

Explanation:
Job rotations reduce the risk of collusion of activities between individuals.
Companies with individuals working with sensitive information or systems where there might be the opportunity for personal gain through collusion can benefit by integrating job rotation with segregation of duties. Rotating the position may uncover activities that the individual is performing outside of the normal operating procedures, highlighting errors or fraudulent behavior.
Rotation of duties is a method of reducing the risk associated with a subject performing a
(sensitive) task by limiting the amount of time the subject is assigned to perform the task before being moved to a different task.
The following are incorrect answers:
Key escrow is related to the protection of keys in storage by splitting the key in pieces that will be controlled by different departments. Key escrow is the process of ensuring a third party maintains a copy of a private key or key needed to decrypt information. Key escrow also should be considered mandatory for most organization's use of cryptography as encrypted information belongs to the organization and not the individual; however often an individual's key is used to encrypt the information.
Separation of duties is a basic control that prevents or detects errors and irregularities by assigning responsibility for different parts of critical tasks to separate individuals, thus limiting the effect a single person can have on a system. One individual should not have the capability to execute all of the steps of a particular process. This is especially important in critical business areas, where individuals may have greater access and capability to modify, delete, or add data to the system. Failure to separate duties could result in individuals embezzling money from the company without the involvement of others.
The need-to-know principle specifies that a person must not only be cleared to access classified or other sensitive information, but have requirement for such information to carry out assigned job duties. Ordinary or limited user accounts are what most users are assigned. They should be restricted only to those privileges that are strictly required, following the principle of least privilege. Access should be limited to specific objects following the principle of need-to-know.
The principle of least privilege requires that each subject in a system be granted the most restrictive set of privileges (or lowest clearance) needed for the performance of authorized tasks. Least privilege refers to granting users only the accesses that are required to perform their job functions. Some employees will require greater access than others based upon their job functions. For example, an individual performing data entry on a mainframe system may have no need for Internet access or the ability to run reports regarding the information that they are entering into the system. Conversely, a supervisor may have the need to run reports, but should not be provided the capability to change information in the database.
Reference(s) used for this question:
Hernandez copyright, Steven (2012-12-21). Official (ISC)2 Guide to the copyright CBK, Third
Edition ((ISC)2 Press) (Kindle Locations 10628-10631). Auerbach Publications. Kindle
Edition.
and
Hernandez copyright, Steven (2012-12-21). Official (ISC)2 Guide to the copyright CBK, Third
Edition ((ISC)2 Press) (Kindle Locations 10635-10638). Auerbach Publications. Kindle
Edition.
and
Hernandez copyright, Steven (2012-12-21). Official (ISC)2 Guide to the copyright CBK, Third
Edition ((ISC)2 Press) (Kindle Locations 10693-10697). Auerbach Publications. Kindle
Edition.
and
Hernandez copyright, Steven (2012-12-21). Official (ISC)2 Guide to the copyright CBK, Third
Edition ((ISC)2 Press) (Kindle Locations 16338-16341). Auerbach Publications. Kindle
Edition.


NEW QUESTION # 824
......

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