300-420 · Question #104
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 correct answer is C. dual stack. To support applications that dynamically choose between IPv4 and IPv6 based on DNS requests, the dual stack migration strategy is most appropriate.
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?
Options
- AAFT for public web presence
- Bhost-initiated tunnels
- Cdual stack
- Dsite-to-site IPv6 over IPv4 tunnels
How the community answered
(59 responses)- A8% (5)
- B15% (9)
- C73% (43)
- D3% (2)
Why each option
To support applications that dynamically choose between IPv4 and IPv6 based on DNS requests, the dual stack migration strategy is most appropriate.
AFT for public web presence involves translation between IPv4 and IPv6, not a direct application choice based on DNS.
Host-initiated tunnels are a mechanism for encapsulating IPv6 over IPv4, not a comprehensive migration strategy for application protocol selection.
Dual stack allows network devices and applications to simultaneously operate using both IPv4 and IPv6 protocols. This enables applications to query DNS for both A (IPv4) and AAAA (IPv6) records and then choose the preferred protocol for communication, directly meeting the design requirement.
Site-to-site IPv6 over IPv4 tunnels are a specific tunneling method, not a general strategy enabling applications to choose protocols via DNS.
Concept tested: IPv4/IPv6 migration strategies, dual stack operation
Source: https://learn.microsoft.com/en-us/windows-server/networking/ipv6/ipv6-transition-technologies
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