What is the major difference between a worm and a Trojan horse?

Which of the following statements are true about an application-level gateway?
Each correct answer represents a complete solution. Choose all that apply.

Which type of attack is the unauthorized access of information from a wireless device through a Bluetooth connection, often between phones, desktops, laptops, and PDAs?

Which of the following statements about reconnaissance is true?

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?