December 2019
Beginner
510 pages
12h 7m
English
Content preview from Networking Fundamentals
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Dropping leading zeroes
The one rule that everyone seems to remember is, in each group of numbers, we can drop the leading zeroes. Using our preceding example, I have emboldened the leading zeroes:
2001:0034:09FA:F3B2:20E4:1030:0001:4BC2
Removing them would give us the following legitimate IPv6 address:
2001:34:9FA:F3B2:20E4:1030:1:4BC2
The important thing to note is that it is only leading zeroes, not intermediate nor trailing zeroes. I'll give you a couple of examples to highlight why we specify only leading. Look at the sixth group of numbers:
1030
If we could remove leading AND trailing zeroes, we would be left with the following:
103
We would have no way to find out whether the original number was 0103 or 1030. This would be even worse ...
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