Which of the following types of attacks cannot be prevented by a firewall?
Each correct answer represents a complete solution. Choose all that apply.

You are advising a school district on disaster recovery plans. In case a disaster affects the main IT centers for the district they will need to be able to work from an alternate location. However, budget is an issue.
Which of the following is most appropriate for this client?

The MBR of a hard disk is a collection of boot records that contain disk information such as disk architecture, cluster size, and so on. The main work of the MBR is to locate and run necessary operating system files that are required to run a hard disk. In the context of the operating system, MBR is also known as the boot loader. Which of the following viruses can infect the MBR of a hard disk?
Each correct answer represents a complete solution. Choose two.

Which of the following methods will allow data to be sent on the Internet in a secure format?

Which of the following types of authentication is generally used for public Internet Web sites?