When an intrusion into an organization network is deleted, which of the following should be done FIRST?
Correct Answer: D
Explanation The first thing that should be done when an intrusion into an organization network is detected is to identify nodes that have been compromised. Identifying nodes that have been compromised is a critical step in responding to an intrusion, as it helps determine the scope, impact, and source of the attack, and enables the implementation of appropriate containment and recovery measures. The other options are not the first things that should be done when an intrusion into an organization network is detected, as they may be premature or ineffective without identifying nodes that have been compromised. Blocking all compromised network nodes is a containment measure that can help isolate and prevent the spread of the attack, but it may not be possible or feasible without identifying nodes that have been compromised. Contacting law enforcement is a reporting measure that can help seek external assistance and comply with legal obligations, but it may not be necessary or appropriate without identifying nodes that have been compromised. Notifying senior management is a communication measure that can help inform and escalate the incident, but it may not be urgent or accurate without identifying nodes that have been compromised. References: CISA Review Manual (Digital Version), Chapter 4, Section 4.2.2
Question 412
Which of the following is the MOST effective type of antivirus software?
Correct Answer: C
Integrity checkers compute a binary number on a known virus-free program that is then stored in a database file. This number is called a cyclical redundancy check (CRC). When that program is called to execute, the checker computes the CRC on the program about to be executed and compares it to the number in the database. A match means no infection; a mismatch means that a change in the program has occurred. A change in the program could mean a virus. Scanners look for sequences of bits called signatures that are typical of virus programs. They examine memory, disk boot sectors, executables and command files for bit patterns that match a known virus. Therefore, scanners need to be updated periodically to remain effective. Active monitors interpret DOS and ROM basic input-output system (BIOS) calls, looking for virus-like actions. Active monitors can be misleading, because they cannot distinguish between a user request and a program or virus request. As a result, users are asked to confirm actions like formatting a disk or deleting a file or set of files. Vaccines are known to be good antivirus software. However, they also need to be updated periodically to remain effective.
Question 413
Which of the following would BEST prevent data from being orphaned?
Correct Answer: B
Question 414
The MOST significant reason for using key performance indicators (KPIs) to track the progress of IT projects against initial targets is that they:
Correct Answer: D
Section: Information System Acquisition, Development and Implementation
Question 415
Which of the following is the BEST source of information for examining the classification of new data?
Correct Answer: C
Explanation The best source of information for examining the classification of new data is the risk assessment results, because they provide an objective and consistent basis for determining the value, sensitivity, and criticality of the data, as well as the potential impact of unauthorized disclosure, modification, or loss of the data12. The risk assessment results can help to define the appropriate classification levels and criteria for the data, such as public, internal, confidential, or restricted12. Input by data custodians, security policy requirements, and current level of protection are not the best sources of information for examining the classification of new data, because they may not reflect the actual risk exposure or business needs of the data. References: 1: CISA Review Manual (Digital Version), Chapter 5, Section 5.4.2 2: CISA Online Review Course, Module 5, Lesson 4
