GCIA · Question #89
Which of the following IPv4 to IPv6 transition methods uses encapsulation of IPv6 packets to traverse IPv4 networks?
The correct answer is C. Tunneling. This question tests knowledge of IPv4-to-IPv6 transition mechanisms, specifically which method wraps IPv6 traffic inside IPv4 packets to cross IPv4-only infrastructure.
Question
Which of the following IPv4 to IPv6 transition methods uses encapsulation of IPv6 packets to traverse IPv4 networks?
Options
- ADual-stack
- BTranslation
- CTunneling
- DStack
How the community answered
(42 responses)- A2% (1)
- B7% (3)
- C79% (33)
- D12% (5)
Why each option
This question tests knowledge of IPv4-to-IPv6 transition mechanisms, specifically which method wraps IPv6 traffic inside IPv4 packets to cross IPv4-only infrastructure.
Dual-stack configures devices to run both IPv4 and IPv6 simultaneously without encapsulating one protocol inside the other.
Translation converts packet headers between IPv4 and IPv6 (e.g., NAT64) rather than encapsulating one inside the other.
Tunneling encapsulates IPv6 packets inside IPv4 packets, allowing them to traverse IPv4-only network segments without requiring those segments to understand IPv6. Techniques such as 6in4, 6to4, and ISATAP all rely on this encapsulation approach. The IPv4 network simply sees the outer IPv4 header and forwards the packet normally, with the IPv6 payload extracted at the tunnel endpoint.
Stack is not a defined IPv4-to-IPv6 transition mechanism; it is a distractor.
Concept tested: IPv6 tunneling transition mechanism encapsulation
Source: https://learn.microsoft.com/en-us/azure/virtual-network/ipv6-overview
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