Which configuration is used for IP6-over-IP4 tunnels?

The correct choice for configuring IPv6-over-IPv4 tunnels involves specifying the destination IP address for the tunnel interface. Setting the tunnel destination establishes the endpoint of the tunnel for packets being encapsulated. In this context, by using a command to set the tunnel destination to an IPv4 address (such as 10.0.0.1), you are directing where the encapsulated IPv6 packets will be sent through the IPv4 network.

IPv6-over-IPv4 tunneling is a method used to carry IPv6 packets over an IPv4 infrastructure. This encapsulation technique relies on establishing both a tunnel source and a tunnel destination. While the chosen option addresses the destination, it’s worth noting that the source configuration is also crucial for establishing the tunnel connection correctly.

The other options either pertain to different configurations, such as defining the encapsulation type which is typically needed for IPv6 traffic, or setting up addresses on the tunnel interface itself rather than specifying the parameters needed to establish the tunnel. Therefore, focusing on the tunnel destination in the correct configuration is a vital step in enabling IPv6-over-IPv4 tunneling.