Your company has a single Active Directory directory service domain. All servers in your environment run Windows Server 2003. Client computers run Windows XP or Windows Vista. You plan to create a security update scan procedure for client computers. You need to choose a security tool that supports all the client computers. 
Which tool should you choose？ （）

You are the network administrator for your company. The network consists of a single Active Directory domain. All computers on the network are members of the domain. The domain contains a Windows Server 2003 computer named Server1. You are planning a public key infrastructure （PKI） for the company. You want to deploy a certification authority （CA） on Server1. You create a new global security group named Cert Administrators. You need to delegate the tasks to issue， approve， and revoke certificates to members of the Cert Administrators group.
 What should you do？（）