Correct Answer: B

NAP enforces health policies by inspecting and assessing the health of client computers, restricting network access when client computers are noncompliant with health policy, and remediating noncompliant client computers to bring them into compliance with health policy before they are granted full network access. NAP enforces health policies on client computers that are attempting to connect to a network; NAP also provides ongoing health compliance enforcement while a client computer is connected to a network. Reference: http://technet.microsoft.com/en-us/library/cc754378(v=ws.10).aspx

Correct Answer: A

The network layer defines the mechanisms that allow data to be passed from one network to another.

Answer: B is incorrect. The session layer is responsible for data synchronization between the applications on the sending device and the receiving device. Answer: C is incorrect. The physical layer is the lowest layer of the OSI model. The

physical layer is responsible for packaging and transmitting data over physical media. This layer controls the way in which data is sent and received over a physical medium.

Answer: D is incorrect. The data-link layer is responsible for error free transfer of data frames.

Correct Answer: D

A Heuristic antivirus protection solution uses certain behaviors to identify a file as a virus, even if it is not on any known antivirus list.

Correct Answer: A

A polymorphic virus has the ability to change its own signature at the time of infection. This virus is very complicated and hard to detect. When the user runs the infected file in the disk, it loads the virus into the RAM. The new virus starts making its own copies and infects other files of the operating system. The mutation engine of the polymorphic virus generates a new encrypted code, thus changing the signature of the virus. Therefore, polymorphic viruses cannot be detected by signature-based antivirus. Answer: B is incorrect. A Master boot record (MBR) virus replaces the boot sector data with its own malicious code. Every time when the computer starts up, the boot sector virus executes. It can then generate activity that is either annoying (system will play sounds at certain times) or destructive (erase the hard drive of the system). Because the code in the Master Boot Record executes before any operating system is started, no operating system can detect or recover from corruption of the Master Boot Record.

Answer: D is incorrect. A macro virus is a virus that consists of a macro code which infects the system. A Macro virus can infect a system rapidly. Since this virus has VB event handlers, it is dynamic in nature and displays random activation. The victim has only to open a file having a macro virus in order to infect the system with the virus. DMV, Nuclear, and Word Concept are some good examples of macro viruses. Answer: C is incorrect. A boot sector virus infects the master boot files of the hard disk or floppy disk. Boot record programs are responsible for booting the operating system and the boot sector virus copies these programs into another part of the hard disk or overwrites these files. Therefore, when the floppy or the hard disk boots, the virus infects the computer.

Correct Answer: C

The policy of maximum password age defines a time duration before a password is required to be changed.