单项选择题 Your network contains an Active Directory forest.The forest contains three domain trees.Each domain tree contains multiple domains.You have an Active Directory-integrated DNS zone.You install a Web server named Web1. All of the users in the company will use Web1.You need to ensure that the users can access Web1 by using the URL http://web1. You want to achieve this goal by using the minimum amount of administrative effort.What should you do？（）

单项选择题 Your company has a single active directory forest that has an active directory domain named na.contoso.com. a member server named server2 runs the DNS server role. The server2 DNS service hosts multiple secondary zones including na.contoso.com. you need to reconfigure server2 as a caching-only DNS server. What should you do?（）

单项选择题 Your network consists of single active domain. The domain contains a serve named server1 that runs windows server 2008 all client computers run windows vista. All computers are members of the active directory domain. You assign the secure server (Require Security) IPsec policy to server1 by using a GPO. Users report that they fail to connect to server1. You need to ensure that users can connect to server1. All connections to server1 must be encrypted. What should you do?（）