What is the purpose of user authentication? a. Collecting biometric data about a user b. Enrolling the user into the system c. Authorizing a user for access to specific information d. Validating the identity of the user Which of the following best describes a digital signature? a. A method to let the receiver of the message prove the source and integrity of a message b. A method of transferring a handwritten signature to an electronic document c. A method to encrypt confidential information d. A method to provide an electronic signature and encryption Which of the following statements are true regarding IEEE 802.1X? a. Network switch configurations must be updated whenever a users credentials are changed to permit access to the networ b. EAP traffic must be blocked by the 802.1X server to prevent unauthorized access c. A AAA server validates network access requests and sends responses to the WAP that originated the request d. Uses firewalls to control access from the WAN