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350-501 · Question #385

What are two features of 6RD IPv6 transition mechanism? (Choose two.)

The correct answer is A. It inserts IPv4 bits into an IPv6 delegated prefix. E. It uses stateless automatic 6to4 tunnels between CE routers and the BR router. 6RD (IPv6 Rapid Deployment) is a stateless IPv6 transition mechanism that embeds a customer's IPv4 address within a delegated IPv6 prefix, enabling stateless tunneling of IPv6 packets over an IPv4 infrastructure.

Networking

Question

What are two features of 6RD IPv6 transition mechanism? (Choose two.)

Options

  • AIt inserts IPv4 bits into an IPv6 delegated prefix.
  • BIt uses a native IPv6-routed network between CE routers and the BR router.
  • CIt allows dynamic 1:N translation of IPv6 address.
  • DIt uses stateful automatic 6to4 tunnels between CE routers and the BR router.
  • EIt uses stateless automatic 6to4 tunnels between CE routers and the BR router.

How the community answered

(42 responses)
  • A
    93% (39)
  • B
    2% (1)
  • D
    5% (2)

Why each option

6RD (IPv6 Rapid Deployment) is a stateless IPv6 transition mechanism that embeds a customer's IPv4 address within a delegated IPv6 prefix, enabling stateless tunneling of IPv6 packets over an IPv4 infrastructure.

AIt inserts IPv4 bits into an IPv6 delegated prefix.Correct

A core feature of 6RD is the embedding of the customer's public IPv4 address into a specific IPv6 prefix allocated by the ISP, which allows for stateless address translation and routing.

BIt uses a native IPv6-routed network between CE routers and the BR router.

6RD is designed to operate over an existing IPv4 network between the customer edge (CE) router and the border relay (BR) router, not a native IPv6-routed network.

CIt allows dynamic 1:N translation of IPv6 address.

6RD provides a 1:1 mapping between a customer's public IPv4 address and a block of IPv6 addresses, not a dynamic 1:N translation.

DIt uses stateful automatic 6to4 tunnels between CE routers and the BR router.

6RD (like 6to4) is a stateless tunneling mechanism, meaning it does not maintain per-flow state information like stateful NAT64 would.

EIt uses stateless automatic 6to4 tunnels between CE routers and the BR router.Correct

6RD operates by using stateless tunneling, where IPv6 packets are encapsulated directly into IPv4 packets without maintaining state per tunnel, similar in principle to 6to4 but designed for a single ISP.

Concept tested: IPv6 6RD transition mechanism features

Source: https://datatracker.ietf.org/doc/html/rfc5569

Topics

#IPv6#6rd#IPv6 Transition Mechanisms#Tunneling

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