Q.

The                    field determines the lifetime of IPv6 datagram

A. use dual-stack approach
B. tunneling
C. no solution
D. replace the system
Answer» B. tunneling
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.
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