Your network contains two servers named Server1 and Server2 that run Windows Server 2008 R2.
Network Access Protection (NAP) is deployed on Server1. Server2 has the Routing and Remote
Access service (RRAS) role service installed. You need to configure Server2 to use NAP VPN
enforcement. Which authentication method should you enable on Server2?

A.
Microsoft encrypted authentication version 2 (MS-CHAP v2)

B.
Extensible authentication protocol (EAP)

C.
Allow machine certificate authentication for IKEv2

D.
Encrypted authentication (CHAP)