Free Access to ISC.SSCP.v2025-03-28.q390 with Valid Practice Test (Page 8)

Question 31

Which of the following would be the best reason for separating the test and development environments?

A.To restrict access to systems under test.
B.To control the stability of the test environment.
C.To segregate user and development staff.
D.To secure access to systems under development.

Question 32

What does the simple security (ss) property mean in the Bell-LaPadula model?

A.No read up
B.No write down
C.No read down
D.No write up

Question 33

A potential problem related to the physical installation of the Iris Scanner in regards to the usage of the iris pattern within a biometric system is:

A.concern that the laser beam may cause eye damage
B.the iris pattern changes as a person grows older.
C.there is a relatively high rate of false accepts.
D.the optical unit must be positioned so that the sun does not shine into the aperture.

Correct Answer: D

Because the optical unit utilizes a camera and infrared light to create the images, sun light can impact the aperture so it must not be positioned in direct light of any type. Because the subject does not need to have direct contact with the optical reader, direct light can impact the reader.
An Iris recognition is a form of biometrics that is based on the uniqueness of a subject's iris. A camera like device records the patterns of the iris creating what is known as Iriscode. It is the unique patterns of the iris that allow it to be one of the most accurate forms of biometric identification of an individual. Unlike other types of biometics, the iris rarely changes over time.
Fingerprints can change over time due to scaring and manual labor, voice patterns can change due to a variety of causes, hand geometry can also change as well. But barring surgery or an accident it is not usual for an iris to change. The subject has a high-resoulution image taken of their iris and this is then converted to Iriscode. The current standard for the Iriscode was developed by John Daugman. When the subject attempts to be authenticated an infrared light is used to capture the iris image and this image is then compared to the Iriscode. If there is a match the subject's identity is confirmed. The subject does not need to have direct contact with the optical reader so it is a less invasive means of authentication then retinal scanning would be.
The following answers are incorrect:
concern that the laser beam may cause eye damage. The optical readers do not use laser so, concern that the laser beam may cause eye damage is not an issue. the iris pattern changes as a person grows older. The question asked about the physical installation of the scanner, so this was not the best answer. If the question would have been about long term problems then it could have been the best choice. Recent research has shown that Irises actually do change over time:
http://www.nature.com/news/ageing-eyes-hinder-biometric-scans-1.10722 there is a relatively high rate of false accepts. Since the advent of the Iriscode there is a very low rate of false accepts, in fact the algorithm used has never had a false match. This all depends on the quality of the equipment used but because of the uniqueness of the iris even when comparing identical twins, iris patterns are unique.

Question 34

What is a hot-site facility?

A.A site with pre-installed computers, raised flooring, air conditioning, telecommunications and networking equipment, and UPS.
B.A site in which space is reserved with pre-installed wiring and raised floors.
C.A site with raised flooring, air conditioning, telecommunications, and networking equipment, and UPS.
D.A site with ready made work space with telecommunications equipment, LANs, PCs, and terminals for work groups.

Question 35

Which backup method does not reset the archive bit on files that are backed up?

A.Full backup method
B.Incremental backup method
C.Differential backup method
D.Additive backup method

Question 31

Question 32

Question 33

Question 34

Question 35

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