DNS-Based Application Choice
Question
An architect is creating a migration strategy for a large organization in which the choice made by the application between IPv6 and IPv4 is based on the DNS request.
Which migration strategy does the architect choose?
Answers
Explanations
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The best migration strategy for the organization, in which the choice between IPv6 and IPv4 is based on DNS request, is dual-stack.
Dual-stack is a migration strategy in which both IPv4 and IPv6 protocols are deployed simultaneously on the network infrastructure, providing support for both protocols. This strategy enables the coexistence of IPv4 and IPv6 protocols and allows for a smooth transition from IPv4 to IPv6.
When a DNS request is made, the server can provide both IPv4 and IPv6 addresses in response, and the client can choose which protocol to use based on availability and preference. Dual-stack provides a seamless transition by allowing both protocols to operate at the same time.
AFT for public web presence is a migration strategy that involves using application front-end technology to provide support for IPv6 and IPv4 simultaneously. However, this strategy may not be suitable for the entire organization's network, and it is more commonly used for public-facing web applications.
Host-initiated tunnels and site-to-site IPv6 over IPv4 tunnels are migration strategies that involve tunneling IPv6 traffic over the existing IPv4 infrastructure. However, these strategies can be complex and may not be the best choice for a large organization, especially if there are security concerns.
Therefore, dual-stack is the best migration strategy for a large organization in which the choice between IPv6 and IPv4 is based on DNS request, as it enables the coexistence of both protocols and provides a smooth transition from IPv4 to IPv6.
