Which of the following is the shortest valid abbreviation for 2000:0300:0040:0005: 6000:0700:0080:0009?
- 2:3:4:5:6:7:8:9
- 2000:300:40:5:6000:700:80:9
- 2000:300:4:5:6000:700:8:9
- 2000:3:4:5:6:7:8:9
Explanation: This question has many quartets that make it easy to make a common mistake: removing trailing 0s in a quartet of hex digits. To abbreviate IPv6 addresses, only leading 0s in a quartet should be removed. Many of the quartets have trailing 0s (0s on the right side of the quartet), so make sure to not remove those 0s.
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