Which term describes the process of encapsulating IPv6 packets inside IPv4 packets?

A.
tunneling

B.
hashing

C.
routing

D.
NAT

Explanation:
This question is to examine the IPv6 application.
There are three IPv6 transition mechanisms:
1. Dual stack
2. 6to4 Tunneling
3. NAT-PT
This question describes the 6to4 Tunneling.