IPv6 Deployment Strategies

Correct Answer: Tunneling

The best deployment method for this situation would be 'Tunneling'. Tunneling allows the encapsulation of an IPv6 packet inside an IPv4 packet so it can be transported across an IPv4 network. This strategy is particularly effective when the main headquarters uses IPv6 addressing system while the remote offices are still on IPv4. On the other hand, 'Dual Stack' requires the network to run both IPv4 and IPv6 which might not be feasible for every location. 'Translation' involves translating IPv6 packets into IPv4 packets (or vice versa), but this technique is complex and may result in certain compatibility issues. Lastly, 'Hybrid' is a combination of dual stack and tunneling methods, and is typically used when a network is moving from IPv4 to IPv6, but it can be more complex and resource-intensive than just using tunneling alone.

Correct Answer: Dual Stack

The Dual Stack strategy would be the best for a gradual transition from IPv4 to IPv6. This is because it allows devices to operate in both IPv4 and IPv6 networks simultaneously, which makes the transition smoother. The other strategies could also be used, but they have some disadvantages. For example, Tunneling encapsulates IPv6 packets within IPv4 packets for transportation, which can add complexity and reduce performance. Translation methods convert IPv4 packets to IPv6 packets and vice-versa, but they can create interoperability issues. Hybrid is a combination of dual stack and tunneling, but it can also add complexity.

Correct Answer: Dual-Stack Implementation

Dual-Stack Implementation allows both IPv4 and IPv6 to coexist and operate independently on the same networking devices and infrastructure. During the transition period, devices and services can run IPv4 and IPv6 simultaneously, minimizing impact on the existing IPv4 infrastructure. IPv6 Rapid Deployment is not targeted at maintaining the existing IPv4 infrastructure, but rather at a fast deployment of IPv6, which might not ensure minimal impact on IPv4. IPv4 Replacement Strategy implies a complete switch to IPv6, which would cause significant changes to the current IPv4 infrastructure. IPv6-over-IPv4 Tunneling certainly ensures that both protocols can be used during transition, but it involves encapsulating IPv6 traffic within IPv4 packets, which could be more complex to manage and might not be considered minimal impact compared to running both protocols natively as in Dual-Stack Implementation.