Question

Suppose two IPv6 nodes want to interoperate using IPv6 datagrams, but they are connected to each other by intervening IPv4 routers. The best solution here is ________

(a) Use dual-stack approach

(b) Tunneling

(c) No solution

(d) Replace the system

This question was posed to me during an interview.

I want to ask this question from IPv6 in division TCP/IP Protocol Suite of Computer Network

Answer 1

Correct option is (b) Tunneling

The explanation: The IPv4 routers can form a tunnel in which at the sender’s side, the IPv6 datagram is encapsulated in to IPv4, and at the receiver’s side of the tunnel, the IPv4 packet is stripped and the IPv6 packet is sent to the receiver.