300-320 Question #667: Real Exam Question with Answer & Explanation

The correct answer is C: 6RD. (C) 6RD (IPv6 Rapid Deployment) is a tunneling mechanism that encapsulates IPv6 packets inside IPv4 packets, allowing ISPs to deliver IPv6 service over an existing IPv4 infrastructure. (D) DS-Lite (Dual-Stack Lite) is a tunneling mechanism that encapsulates IPv4 packets inside IP

Question

Which transition mechanisms are considered tunneling mechanisms? (Select two.)

Options

ANAT64
BDual Stack
C6RD
DDS-Lite
EDHCPv6

Explanation

(C) 6RD (IPv6 Rapid Deployment) is a tunneling mechanism that encapsulates IPv6 packets inside IPv4 packets, allowing ISPs to deliver IPv6 service over an existing IPv4 infrastructure. (D) DS-Lite (Dual-Stack Lite) is a tunneling mechanism that encapsulates IPv4 packets inside IPv6 packets, allowing IPv4 connectivity to be delivered over an IPv6-only access network. (A) NAT64 is a translation mechanism, not tunneling. (B) Dual Stack is simply running both protocol stacks natively - no tunneling involved. (E) DHCPv6 is an address assignment protocol, not a transition or tunneling mechanism.

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