Your network contains an Active Directory domain that contains five domain controllers. You have  a management computer that runs Windows 7.  
From the Windows 7 computer， you need to view all account logon failures that occur in the  domain.    
The information must be consolidated on one list.  
Which command should you run on each domain controller（）

Your network contains an Active Directory domain named contoso.com. The domain contains five  domain controllers.
You add a logoff script to an existing Group Policy object （GPO）. You need to verify that each  domain controller successfully replicates the updated group policy.    
Which two objects should you verify on each domain controller（）