Mark works as a Network Administrator for Infonet Inc. The company has a Windows 2003 domainbased network. The network contains five Windows 2003 member servers and 300 Windows XP Professional client computers. Mark is setting up a wireless network for the company. He is planning to implement 802.1x authentication for this new wireless network. Mark is not planning to use a public key infrastructure (PKI) and certificates for authentication. Mark also wants an encrypted authentication channel and a fast reconnect using cached session keys. Which of the following authentication methods will he use to accomplish the task?