Convert 2001:0DB8:B8:0000:0000:0000:0000:0000:09A0:CDEF address________________________ (if the answer contains letters, capitalize them.)

Question

Options

• A2001:DB8:B8::9A0:CDEF
• B2001:0DB8:B8:0:0:0:0:09A0:CDEF
• C2001:0DB8:B8:0000:0000:0000:09A0:CDEF
• D2001:DB8:B8::09A0:CDEF

• A
  81% (13)
• B
  6% (1)
• D
  13% (2)

Explanation

Note: The original address in the question contains 10 groups, which is invalid for IPv6 (which requires exactly 8). The intended address is most likely 2001:0DB8:00B8:0000:0000:0000:09A0:CDEF.

Option A (2001:DB8:B8::9A0:CDEF) correctly applies both IPv6 compression rules simultaneously: leading zeros are stripped from each group (0DB8 → DB8, 09A0 → 9A0), and the longest consecutive run of all-zero groups is replaced with :: (the three :0000: blocks become ::). Option B is wrong because it retains leading zeros in 0DB8 and 09A0, and writes out the zero groups explicitly rather than using ::. Option C is wrong for the same leading-zero violations and also fails to apply :: compression. Option D gets the :: right and strips 0DB8 correctly, but leaves the leading zero in 09A0 - it should be 9A0, not 09A0. Memory tip: use the phrase "strip and zip" - first strip all leading zeros from every group, then zip the longest consecutive run of all-zero groups into ::.

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