Explanation: Confidentiality is a term that refers to the protection of data against unauthorized access. Administrators can provide confidentiality by encrypting data. Symmetric encryption is a relatively fast encryption method. Hence, this method of encryption is best suited for encrypting large amounts of data such as files on a computer. Answer: A is incorrect. Integrity ensures that no intentional or unintentional unauthorized modification is made to data. Answer: C is incorrect. Auditing is used to track user accounts for file and object access, logon attempts, system shutdown etc. This enhances the security of the network. Before enabling auditing, the type of event to be audited should be specified in the Audit Policy in User Manager for Domains.