Your companys Windows Server 2003 environment consists of a single Active Directory directory service forest. The forest has multiple domains and three sites named Site1， Site2， and Site3. Site1 is the main office and has four domain controllers. Two of the domain controllers are global catalog servers. Site2 is a branch office with two domain controllers. Site3 is a branch office with a slow and unreliable WAN link and two domain controllers.  You need to improve user logon performance for users in Site2 and Site3. 
Which two actions should you perform？（）

Your company has a single Active Directory directory service forest with multiple domains. The Schema FSMO role is held by one of the domain controllers in the forest root domain. The DomainThe safer ， easier way to help you pass any IT exams. Naming Master FSMO role is held by one of the domain controllers in a child domain. All domain controllers have Windows Server 2003 installed.  You need to upgrade all domain controllers to Windows Server 2003 R2. 
Which two actions should you perform？（）