What is the name of the service included with the Windows Server operating system that manages a centralized database containing user account and security information ?

Your network consists of a single Active Directory domain. All network servers run Windows Server 2003 Service Pack 2 (SP2). You share a folder named Research. A user named User1 reports that he cannot access files in the Research share. You confirm that the Domain Users group is granted the Change permission for the Research share. You run the Cacls command as shown in the exhibit:

You need to ensure that User1 can modify files in the Research share. You must prevent User1 from modifying permissions for the Research folder. To which group should you add User1?

Your network contains an application server named Server1 that runs Windows Server 2003 Service Pack(SP2). You open the Performance tab in Task Manager as shown in the exhibit:

You need to improve the performance of Server1. What should you do?

Your network consists of a single Active Directory domain. All servers run Windows Server 2003 Service Pack 2 (SP2). All client computers run Windows XP Service Pack 3 (SP3). You install and configure Microsoft Windows Server Update Services (WSUS) 3.0 on a member server named Server1. You create a new Group Policy Object named GPO1 that enables automatic updating. You link GPO1 to the domain. You need to ensure that each client computer obtains software updates from Server1. What should you do?

Your network consists of a single Active Directory domain that contains two domain controllers. Both domain controllers run Windows Server 2003 Service Pack 2 (SP2). Auditing of successful account logon events is enabled on all computers in the domain. You need to identify the last time a specific user logged on to the domain. What should you do?