Which of the following attack vectors are addressed by Xinetd and TCP Wrappers?

A Host-based Intrusion Prevention System (HIPS) software vendor records how the Firefox Web browser interacts with the operating system and other applications, and identifies all areas of Firefox functionality. After collecting all the data about how Firefox should work, a database is created with this information, and it is fed into the HIPS software. The HIPS then monitors Firefox whenever it's in use. What feature of HIPS is being described in this scenario?

Which of the following protocols implements VPN using IPSec?

Which of the following Unix syslog message priorities is the MOST severe?

Which of the following utilities provides an efficient way to give specific users permission to use specific system commands at the root level of a Linux operating system?