H12-821_V1.0 · Question #906
IPv6 address 2001:FC1A:8BAD:0112:0000:1200:0000:0001/64 is abbreviated to 2001:FC1A:8BAD:112:0:1200::1/64
The correct answer is A. TRUE. Option A is correct because both IPv6 abbreviation rules have been applied properly: leading zeros are stripped from each group (0112 → 112, 0000 → 0, 0001 → 1), and the single all-zero group (0000) in the seventh position is replaced with ::. The :: notation is valid even when…
Question
Options
- ATRUE
- BFALSE
- C
- D
How the community answered
(32 responses)- A78% (25)
- B3% (1)
- C13% (4)
- D6% (2)
Explanation
Option A is correct because both IPv6 abbreviation rules have been applied properly: leading zeros are stripped from each group (0112 → 112, 0000 → 0, 0001 → 1), and the single all-zero group (0000) in the seventh position is replaced with ::. The :: notation is valid even when it replaces just one group of zeros - it simply means one or more consecutive all-zero groups were omitted. Option B is wrong because the abbreviated form accurately represents the original address - expanding ::1 back gives 0000:0001, and restoring all leading zeros reconstructs the original exactly.
Memory tip: Think of IPv6 shortening as two separate passes - first "drop leading zeros" (0112 → 112), then "collapse one run of zero groups into ::" - and remember that :: can collapse as few as one group.
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