Your network contains an Active Directory domain. The relevant servers in the domain are  configured as shown in the following table：    
Server name  Operating System  Server role  Server1  Windows 2008  Domain controller  
Server2  Windows 2008 R2  Enterprise root certification authority （CA）  
Server3  Windows 2008 R2  Network Device Enrollment Service （NDES）    
You need to ensure that all device certificate requests use the MD5 hash algorithm.    
What should you do（）

Your network contains an Active Directory forest. All domain controllers run Windows Server 2008  
Standard. The functional level of the domain is Windows Server 2003.  You have a certification authority （CA）.  
The relevant servers in the domain are configured as shown in the following table.  Server name  Operating system  Server role  
Server1  Windows Server 2003  Enterprise root CA  Server2  Windows Server 2008  Enterprise subordinate CA   
Server3  Windows Server 2008 R2   
Web Server  
You need to ensure that you can install the Active Directory Certificate Services （AD CS） Certificate  
Enrollment Web Service on the network.  
What should you do（）