CCNA: Cisco Certified Network Associate — Question 134

Which technique can you use to route IPv6 traffic over an IPv4 infrastructure?

Answer options

• A. NAT
• B. 6 to 4 tunneling
• C. L2TPv3
• D. dual-stack

Correct answer: B

Explanation

The correct answer is B, 6 to 4 tunneling, which specifically allows IPv6 packets to be encapsulated within IPv4 packets for transmission. Other options like NAT do not facilitate IPv6 over IPv4 routing, while L2TPv3 is more about layer 2 tunneling and dual-stack involves running both protocols simultaneously rather than tunneling.