Which of the following is an IPv6 transition mechanism in which network devices utilize IPv4 and IPv6 at the same time?
A.
6to4 B.
ISATAP C.
Teredo D.
Dual stack.
D.
Which of the following is an IPv6 transition mechanism in which network devices utilize IPv4 and IPv6 at the same time?
A.
6to4
B.
ISATAP
C.
Teredo
D.
Dual stack.
D.
The correct answer is D. Dual stack.
IPv6 transition mechanisms are techniques used to enable the transition from IPv4 to IPv6. IPv6 is not backward compatible with IPv4, so during the transition period, network devices and applications must be able to support both protocols. One of the ways to achieve this is through the use of dual stack.
Dual stack is a mechanism that allows network devices to support both IPv4 and IPv6 simultaneously. In a dual stack environment, a device has two IP stacks, one for IPv4 and another for IPv6. This means that the device is capable of communicating using both protocols.
When a dual stack device communicates with another device, it selects the protocol to use based on the destination address. If the destination address is an IPv4 address, the device will use the IPv4 stack, and if the destination address is an IPv6 address, it will use the IPv6 stack.
Dual stack is one of the recommended IPv6 transition mechanisms because it is simple to implement and provides the best interoperability between IPv4 and IPv6 networks. However, it requires a significant amount of resources to maintain both IPv4 and IPv6 stacks, and it may not be suitable for all environments.
The other options listed in the question are also IPv6 transition mechanisms. 6to4 is a mechanism that allows IPv6 traffic to be carried over an IPv4 network, while ISATAP is a mechanism that allows IPv6 traffic to be transmitted over an IPv4 infrastructure using an IPv4-in-IPv6 tunnel. Teredo is a tunneling protocol that enables IPv6 traffic to be transmitted over an IPv4 network by encapsulating the IPv6 packets within UDP datagrams.