Which of the following are used to suppress gasoline and oil fires? Each correct answer represents a complete solution. Choose three.

The IPSec protocol is configured in an organization's network in order to maintain a complete infrastructure for secured network communications. IPSec uses four components for this. Which of the following components reduces the size of data transmitted over congested network connections and increases the speed of such networks without losing data?

In which of the following access control models can a user not grant permissions to other users to see a copy of an object marked as secret that he has received, unless they have the appropriate permissions?