A security consultant decides to use multiple layers of anti-virus defense, such as end user desktop anti-virus and E-mail gateway. This approach can be used to mitigate which kind of attack?

_________ is a tool that can hide processes from the process list, can hide files, registry entries, and intercept keystrokes.

What file system vulnerability does the following command take advantage of?

type c:\anyfile.exe > c:\winnt\system32\calc.exe:anyfile.exe