1. Right Answer: D
Explanation: Automated controls are generally more effective in preventing improper actions. Policies and standards provide some deterrence, but are not as effective as automated controls.
2. Right Answer: B
Explanation: Some patches can conflict with application code. For this reason, it is very important to first test all patches in a test environment to ensure that there are no conflicts with existing application systems. For this reason, choices C and D are incorrect as they advocate automatic updating. As for frequent server updates, this is an incomplete (vague) answer from the choices given.
3. Right Answer: D
Explanation: Security incidents are configured to capture system events that are important from the security perspective; they include incidents also captured in the security access logs and other monitoring tools. Although, in some instances, they could wait for a few days before they are researched, from the options given this would have the greatest risk to security. Most often, they should be analyzed as soon as possible. Virus signatures should be updated as often as they become available by the vendor, while critical patches should be installed as soon as they are reviewed and tested, which could occur in 24 hours.
4. Right Answer: C
Explanation: The purpose of a metric is to facilitate and track continuous improvement. It will not permit the identification of all security weaknesses. It will raise awareness and help in justifying certain expenditures, but this is not its main purpose.
5. Right Answer: C
Explanation: Due to the complexity of firewall rules and router tables, plus the sheer size of intrusion detection systems (IDSs) and server logs, a physical review will be insufficient. The best approach for confirming the adequacy of these configuration settings is to periodically perform attack and penetration tests.