300-420 Question 48
Single answerAn enterprise network is planning to migrate from IPv4 to IPv6. The network currently uses private IPv4 addressing and NAT to connect to the internet. The organization wants to ensure minimal disruption to existing IPv4 traffic while gradually introducing IPv6. Which IPv6 migration strategy should the organization implement?
- A
Dual-stack implementation
- B
NAT64 translation
- C
Tunneling via GRE
- D
IPv6-only deployment
Show answer and explanation
Correct answer: A
Explanation
Dual-stack implementation is the recommended strategy for migrating from IPv4 to IPv6 in a gradual manner. It allows both protocols to operate simultaneously, ensuring that existing IPv4 traffic is not disrupted while IPv6 is introduced. This approach provides flexibility and supports a seamless transition.
- A. Correct.
Dual-stack implementation allows both IPv4 and IPv6 to coexist on the same network, enabling a gradual migration while maintaining support for existing IPv4 traffic. This strategy minimizes disruption and provides flexibility.
- B. Incorrect.
NAT64 translation is used to enable IPv6-only hosts to communicate with IPv4 hosts. However, it is not suitable for a gradual migration where IPv4 traffic must be maintained alongside IPv6.
- C. Incorrect.
Tunneling via GRE is a technique to encapsulate IPv6 packets within IPv4 for communication over an IPv4-only network. While useful in some scenarios, it does not support coexistence of both protocols within the same network.
- D. Incorrect.
IPv6-only deployment involves replacing IPv4 entirely with IPv6. This approach is not gradual and would disrupt existing IPv4 traffic, making it unsuitable for the given scenario.