You are designing a plan for migrating an application to the Windows Azure platform.  
All users authenticate by using their Active Directory Domain Services （AD DS） credentials.  The Windows Azure application must provide single sign-on （SSO） for domain-authenticated users.  
You need to recommend an authentication type for the service endpoint behavior. 
What should you recommend？（）

You are designing a service that will use the Windows Azure AppFabric Service Bus.  You need to recommend an approach for controlling access to the service by using the Windows Azure AppFabric Access Control Service.
Which two actions should you recommend？（）

An on-premise application is exposed to external users through a Windows Communication Framework （WCF） service endpoint registered in the Windows Azure AppFabric Service Bus.  You need to recommend an approach for providing transport-level security that maximizes performance and minimizes bandwidth requirements. 
What should you recommend？（）

You are designing an application that will interact with non-Windows applications over unreliable connections.  
Each non-Windows application will have its own security token.  
You need to recommend an approach for non-Windows applications to retrieve messages. 
What should you recommend？（）