A. All automatic tunnels encapsulate data in the same way.

B. The 6to4 automatic tunnel requires the use of a specific IP6 address segment, and the assigned address segment is preceded by 3ffe::/16

C. When configuring manual tunneling on the VRP platform, a Tunnel interface is generally created; When configuring automatic tunneling, a Vrua-Template interface is usually created

D. The ISATAP tunnel determines the destination IPV4 address of the tunnel based on the destination IP6 address.

E. Automatic tunneling has great advantages over manual tunneling, and manual tunneling will be phased out