单项选择题 You are a help desk technician for your company. The company network consists of a single Active Directory domain. All client computers run Windows XP Professional. The help desk technicians use Remote Assistance to remotely control user sessions to provide online support to users. The users currently use Microsoft Exchange and Microsoft Outlook to submit Remote Assistance invitations to the help desk technicians. Stephen is a user in the sales department. Stephen has a portable computer and frequently travels to customer locations. While Stephen is in the corporate office, he submits a Remote Assistance invitation to the help desk. When you attempt to answer the invitation and establish the Remote Assistance session, you receive the error message shown in the exhibit. You verify that Stephens computer is connected to the network and that he did not cancel the invitation. You also verify that the invitation did not expire. You do not experience similar problems when establishing Remote Assistance sessions with other computers. You need to be able to establish a Remote Assistance session with Stephens computer. What should you do?（）

单项选择题 You are the help desk manager for your company. The company network consists of a single Active Directory domain. All client computers run Windows XP Professional. All help desk technicians are members of the Help Desk Technicians group. They use Remote Assistance to remotely control user sessions to provide online support and training to users. The users currently use Windows Messenger to submit Remote Assistance invitations to the help desk technicians. You want to reduce the time required for help desk technicians to respond to Remote Assistance requests. To accomplish this goal, you want to configure the client computers to allow help desk technicians to establish a Remote Assistance session with a client computer without requiring an invitation from a user. What should you do?（）

单项选择题 You are a help desk technician for your company. A portion of your company’s network is shown in the exhibit. Michael is an employee in your company’s marketing department. Michael uses a Windows XP Professional computer that is located on Subnet A. You use a Windows XP Professional computer that is located on Subnet B. The company’s firewall does not use Network Address Translation (NAT). Michael sends you a Remote Assistance invitation. In Windows Messenger, you accept the invitation, but you cannot connect to Michael’s computer. Next, you run the Ping command, which verifies connectivity to Michael’s computer. You need to establish a Remote Assistance connection with Michael’s computer. What should you do next?（）