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352-001 · Question #85
352-001 Question #85: Real Exam Question with Answer & Explanation
The correct answer is A: 6rd. 6rd (IPv6 Rapid Deployment) uses stateless encapsulation to tunnel IPv6 packets over IPv4 infrastructure between subscriber CPEs and a 6rd Border Relay.
Question
When creating a design plan for IPv6 integration, you decide to use stateless encapsulation of IPv6 packets into IPv4 tunnels between subscriber CPEs and a border relay. Which deployment technique allows for this functionality?
Options
- A6rd
- BDual-Stack Lite
- C4rd
- DDSTM
Explanation
6rd (IPv6 Rapid Deployment) uses stateless encapsulation to tunnel IPv6 packets over IPv4 infrastructure between subscriber CPEs and a 6rd Border Relay.
Common mistakes.
- B. Dual-Stack Lite tunnels IPv4 traffic over an IPv6 network toward an AFTR for NAT, which is the opposite encapsulation direction from what is described.
- C. 4rd (IPv4 Residual Deployment) is designed to carry IPv4 over IPv6 infrastructure, not to encapsulate IPv6 into IPv4 tunnels.
- D. DSTM uses DHCPv6 to assign temporary global IPv4 addresses to IPv6-only hosts and does not perform stateless IPv6-in-IPv4 encapsulation to a border relay.
Concept tested. 6rd stateless IPv6-in-IPv4 tunnel deployment
Reference. https://www.rfc-editor.org/rfc/rfc5969
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