Which method provides IPv6 packets to be transmitted over a standard IPv4 network without explicit tunnels?

The method that provides IPv6 packets to be transmitted over a standard IPv4 network without explicit tunnels is 6to4. This technique allows an IPv6 packet to be encapsulated within an IPv4 packet using a special addressing scheme that facilitates the automatic transmission of IPv6 packets over an IPv4 infrastructure.

With 6to4, any IPv6 address that starts with the prefix "2002::/16" can automatically be assigned to a corresponding IPv4 address. A minimal configuration is required, enabling the seamless communication of IPv6 packets without the need for tunneling protocols that typically require manual setup.

In contrast, Teredo includes mechanisms for creating tunnels but typically relies on a more complex setup that allows IPv6 packets to traverse NAT devices, which may not align with the requirement of transmitting without explicit tunnels. Dual Stack refers to the simultaneous configuration of both IPv4 and IPv6 on the same device, which is not specifically about encapsulating packets. Dynamic ARP Inspection is unrelated to IPv6 or IPv4 transmission methods; it is a security feature in switched networks to mitigate ARP spoofing attacks.