Which IPv6 address is the equivalent of the IPv4 interface loopback address 127.0.0.1?
A. ::1 B. :: C. 2000::/3 D. 0::/10
Correct Answer: A
Explanation:
In IPv6 the loopback address is written as, ::1
This is a 128bit number, with the first 127 bits being ‘0’ and the 128th bit being ‘1’. It’s just a single address, so could also be written as ::1/128.