300-420 Question 46
Single answerAn enterprise network consists of multiple branch offices connected to the headquarters. The network is currently running IPv4, but the organization plans to migrate to IPv6 to support new IoT devices and meet future scalability requirements. The organization wants to avoid a 'flag day' approach (complete cutover) and ensure a smooth transition while maintaining connectivity between IPv4 and IPv6 nodes during the migration. Which IPv6 migration strategy would best meet the organization's requirements?
- A
Dual-stack deployment
- B
NAT64 translation
- C
6to4 tunneling
- D
IPv6 Rapid Deployment (6rd)
Show answer and explanation
Correct answer: A
Explanation
The dual-stack deployment strategy is the most suitable approach for the organization's requirements. It allows IPv4 and IPv6 to coexist on the same devices and ensures that both protocols can operate simultaneously during the migration process. This avoids service disruptions and provides a gradual transition path. Other strategies like NAT64, 6to4, and 6rd are more targeted solutions for specific scenarios, rather than comprehensive enterprise migration strategies.
- A. Correct.
Dual-stack deployment allows both IPv4 and IPv6 to coexist on the same network devices, ensuring smooth migration. This strategy avoids the need for a 'flag day' and provides connectivity for both IPv4 and IPv6 nodes.
- B. Incorrect.
NAT64 translation enables communication between IPv6 and IPv4 devices but is typically used for specific scenarios, like IPv6-only environments connecting to IPv4-only resources. It is not ideal for a smooth, phased migration of an entire network.
- C. Incorrect.
6to4 tunneling is a transition mechanism that encapsulates IPv6 traffic over IPv4, but it is generally used for specific segments of the network rather than for an enterprise-wide migration strategy.
- D. Incorrect.
IPv6 Rapid Deployment (6rd) is suitable for ISPs to deploy IPv6 quickly over an IPv4 infrastructure but is not designed for enterprise networks transitioning to IPv6.