单项选择题 Your company has a main office and a branch office. The network contains an Active Directory forest. All users on the network access the Internet from their computers. The company hires a temporary employee who has his own portable computer. The employee connects his portable computer to the network. When the employee attempts to join the computer to the domain, the connection fails. A help desk technician reports the following about the employee. He has a domain user account.His computer can access Internet Web sites.His computer can contact domain controllers by using the domain controllers IP addresses. You need to ensure that the employees computer can join the domain. The solution must ensure that the computer can access resources on the Internet. What should you do?（）

单项选择题 All client computers on your company network were recently upgraded from Windows Vista to Windows7. Several employees use a scanner to import document images into a database. They install a new scanning application on their computers. The application updates the device driver for the scanners as part of the installation process. Employees report that the application can no longer connect to the scanner. You need to ensure that the employees can use the scanner. What should you do?（）

单项选择题 All client computers on your company network were recently migrated from Windows XP to Windows 7. Employees use Internet Explorer 8. Each time employees access a Web application, they are prompted to install an add-on. After each installation, the application restarts and prompts the employees to install the add-on again. You need to ensure that employees can run the application. What should you do?（）