Your company has an Active Directory directory service domain. File servers run Windows Server 2003 and are joined to the domain. Client computers run Windows XP Professional. You need to encrypt data communications between file servers and client computers by using IPSec.

Which IPSec transport mode and IPSec authentication method should you use?

A.
Authentication Header (AH) and Kerberos

B.
Authentication Header (AH) and preshared key

C.
Encapsulating Security Payload (ESP) and Kerberos

D.
Encapsulating Security Payload (ESP) and preshared key