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The strategy used when two computers using IPv6 want to communicate with each other and the packet must pass through a region that uses IPv4 is ______________

(a) Dual stack

(b) Header translation

(c) Conversion

(d) Tunneling

The question was asked in an interview for internship.

My doubt stems from Transition from IPV4 to IPV6 topic in portion TCP/IP Protocol Suite of Computer Network

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Correct choice is (d) Tunneling

Explanation: In tunneling, 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.

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