- A. B514 : 82C3 : 0029 : EC7A : EC72
- B. B514 : 82C3 :: 0029 : EC7A : EC72
- C. B514 : 82C3 : 0029 :: EC7A : 0000 : EC72
- D. B514 : 82C3 :: 0029 : EC7A : 0 : EC72
There are two ways that an IPv6 address can be additionally compressed: compressing leading zeros and substituting a group of consecutive zeros with a single double colon (::). Both of these can be used in any number of combinations to notate the same address. It is important to note that the double colon (::) can only be used once within a single IPv6 address notation. So, the extra 0’s can only be compressed once.