a. Primary purpose is to secure wireless traffic payloads. b. Authentication is performed by a Remote Authentication Dial-In User Service. c. In robust security networks, supplicants must use 802.1X to access the network. d. The wireless access point is referred to as the "authenticator". Which of the following methods are used by attackers to deliver malware via instant messaging (IM)? (Select all that apply.) a. Social engineering via a message containing a phrase like "Click here to get a great antivirus tool" from a contact in the recipient's contact list. b. Sending a file infected with a virus. c. Sending a URL containing active malicious code. d. Sending a specially crafted message that exploits a vulnerability in the client software