单项选择题 You have a windows server 2008 compute that has an IP address of 172.16.45.9/21. The server is configured to use ipv6 addressing. You need to test IPv6 communication to a server that has an ip address of 172.16.40.18/21, what should you do from a command prompt?（）

单项选择题 Your network contains two Web servers named Web1 and Web2. Web1 hosts the companys corporate Web site. Web2 is a test server that contains a copy of the Web site.Users connect to Web1 by using the URL http://www.contoso.com.A Web developer named User1 plans to test updates to the Web site on Web2.You need to ensure that User1 connects to Web2 by using the URL http://www.contoso.com. The solution must ensure that all other computers connect to Web1.What should you do？（）

单项选择题 our company has a main office and 15 branch offices. The company has a single active directory domain. All servers run windows server 2008.You need to ensure that the VPN connections between the office and the branch offices meet the following requirements:All data must be encrypted by using end-to-end encryption.The vpn connection must use computer-level authentication.User names and passwords cannot be used for authentication.What should do?（）