- (Topic 6)
Which of the following statements pertaining to packet filtering is incorrect?
Correct Answer:
D
Packet filtering is used in the first generation of firewalls and does not keep track of the state of a connection. Stateful packet filtering does.
Source: WALLHOFF, John, CISSP Summary 2002, April 2002, CBK#2 Telecommunications and Network Security (page 6)
- (Topic 2)
Which of the following would best classify as a management control?
Correct Answer:
A
Management controls focus on the management of the IT security system and the management of risk for a system.
They are techniques and concerns that are normally addressed by management. Routine evaluations and response to identified vulnerabilities are important elements of managing the risk of a system, thus considered management controls.
SECURITY CONTROLS: The management, operational, and technical controls (i.e.,safeguards or countermeasures) prescribed for an information system to protect the confidentiality, integrity, and availability of the system and its information.
SECURITY CONTROL BASELINE: The set of minimum security controls defined for a low- impact, moderate-impact,or high-impact information system.
The following are incorrect answers:
Personnel security, physical and environmental protection and documentation are forms of operational controls.
Reference(s) used for this question: http://csrc.nist.gov/publications/drafts/800-53-rev4/sp800-53-rev4-ipd.pdf
and
FIPS PUB 200 at http://csrc.nist.gov/publications/fips/fips200/FIPS-200-final-march.pdf
- (Topic 4)
How often should tests and disaster recovery drills be performed?
Correct Answer:
C
Tests and disaster recovery drills should be performed at least once a year. The company should have no confidence in an untested plan. Since systems and processes can change, frequent testing will aid in ensuring a plan will succeed.
Source: HARRIS, Shon, All-In-One CISSP Certification Exam Guide, McGraw- Hill/Osborne, 2002, chapter 9: Disaster Recovery and Business continuity (page 621).
- (Topic 4)
What would be the Annualized Rate of Occurrence (ARO) of the threat "user input error", in the case where a company employs 100 data entry clerks and every one of them makes one input error each month?
Correct Answer:
D
If every one of the 100 clerks makes 1 error 12 times per year, it makes a total of 1200 errors. The Annnualized Rate of Occurence (ARO) is a value that represents the estimated frequency in which a threat is expected to occur. The range can be from 0.0 to a large number. Having an average of 1200 errors per year means an ARO of 1200
- (Topic 5)
You work in a police department forensics lab where you examine computers for evidence of crimes. Your work is vital to the success of the prosecution of criminals.
One day you receive a laptop and are part of a two man team responsible for examining it together. However, it is lunch time and after receiving the laptop you leave it on your desk and you both head out to lunch.
What critical step in forensic evidence have you forgotten?
Correct Answer:
A
When evidence from a crime is to be used in the prosecution of a criminal it is critical that you follow the law when handling that evidence. Part of that process is called chain of custody and is when you maintain proactive and documented control over ALL evidence involved in a crime.
Failure to do this can lead to the dismissal of charges against a criminal because if the evidence is compromised because you failed to maintain of chain of custody.
A chain of custody is chronological documentation for evidence in a particular case, and is especially important with electronic evidence due to the possibility of fraudulent data alteration, deletion, or creation. A fully detailed chain of custody report is necessary to prove the physical custody of a piece of evidence and show all parties that had access to said evidence at any given time.
Evidence must be protected from the time it is collected until the time it is presented in court.
The following answers are incorrect:
- Locking the laptop in your desk: Even this wouldn't assure that the defense team would try to challenge chain of custody handling. It's usually easy to break into a desk drawer and
evidence should be stored in approved safes or other storage facility.
- Making a disk image for examination: This is a key part of system forensics where we make a disk image of the evidence system and study that as opposed to studying the real disk drive. That could lead to loss of evidence. However if the original evidence is not secured than the chain of custoday has not been maintained properly.
- Cracking the admin password with chntpw: This isn't correct. Your first mistake was to compromise the chain of custody of the laptop. The chntpw program is a Linux utility to (re)set the password of any user that has a valid (local) account on a Windows system, by modifying the crypted password in the registry's SAM file. You do not need to know the old password to set a new one. It works offline which means you must have physical access (i.e., you have to shutdown your computer and boot off a linux floppy disk). The bootdisk includes stuff to access NTFS partitions and scripts to glue the whole thing together. This utility works with SYSKEY and includes the option to turn it off. A bootdisk image is provided on their website at http://freecode.com/projects/chntpw .
The following reference(s) was used to create this question:
For more details and to cover 100% of the exam QUESTION NO: s, subscribe to our holistic Security+ 2014 CBT Tutorial at: http://www.cccure.tv/
and http://en.wikipedia.org/wiki/Chain_of_custody and
http://www.datarecovery.com/forensic_chain_of_custody.asp
