200-301 Question 52

Community Discussion

Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.

• Chose B1

  The correct answer is B. 6 to 4 tunneling. This technique allows IPv6 packets to be encapsulated inside IPv4 packets so they can be routed over an IPv4-only infrastructure, enabling communication between IPv6 networks across an IPv4 backbone. While NAT and L2TPv3 are used for different purposes (address translation and Layer 2 tunneling, respectively), and dual-stack allows devices to run both IPv4 and IPv6 simultaneously, 6to4 tunneling specifically addresses routing IPv6 over IPv4.

• 1

  6 to 4 tunnel

• 14

  B. 6 to 4 tunneling Imagine you have two groups of friends, one group that talks using a secret code with letters and numbers (IPv6), and another group that talks using regular words (IPv4). But you want these two groups to talk to each other, even though they use different ways of talking. Now, think of a big tunnel that connects these two groups. When someone from the first group wants to send a message to someone in the second group, they put their message in a special envelope and send it through the tunnel. When the message comes out of the tunnel on the other side, it looks like a message from the second group, even though it started with the first group's way of talking. In the same way, 6 to 4 tunneling helps the two different ways of talking, IPv6 and IPv4, to understand each other. It wraps the IPv6 message in an IPv4 wrapper and sends it through a tunnel. This way, they can communicate even though they use different codes.