Which of the following is the IPv6 loopback? 08/06/2019 – by Mod_GuideK 0 Which of the following is the IPv6 loopback? A. 1: :/128 B. : :0/128 C. : :1/128 D. 1::1/0 SHOW ANSWERSCorrect Answer: C Explanation/Reference: Download Printable PDF. VALID exam to help you PASS.