Your network contains two servers named Server1 and Server2 that run Windows Server 2008 R2.  
Server1 has the Active Directory Federation Services （AD FS） Federation Service role service installed.  
You plan to deploy AD FS 2.0 on Server2.  
You need to export the token-signing certificate from Server1， and then import the certificate to Server2.  
Which format should you use to export the certificate（）

Your network contains an Active Directory domain named contoso.com. The domain contains a  
server named Server1. The Active Directory Federation Services （AD FS） role is installed on Server1.
Contoso.com is defined as an account store.  
A partner company has a Web-based application that uses AD FS authentication. The partner company  plans to provide users from contoso.com access to the Web application.  
You need to configure AD FS on contoso.com to allow contoso.com users to be authenticated by the  
partner company.  
What should you create on Server1（）