how do you know indexes have been fragmented

i ran dbcc showcontig on my sql server db and it returned following Table: 'Table1' (1621580815); index ID: 1, database ID: 7 TABLE level scan performed. - Pages Scanned................................: 4982 - Extents Scanned..............................: 628 - Extent Switches..............................: 627 - Avg. Pages per Extent........................: 7.9 - Scan Density [Best Count:Actual Count].......: 99.20% [623:628] - Logical Scan Fragmentation ..................: 0.00% - Extent Scan Fragmentation ...................: 99.52% - Avg. Bytes Free per Page.....................: 38.3 - Avg. Page Density (full).....................: 99.53% Based on searching for info on index defrag it seems my Extent Scan Fragmentation percentage is not what it should be (0%) . Is it true and if yes how can you be sure that your indexes have been fragmented. If indexes are really fragmented what is the best way without reindexing(or is that the best way) to defrag the indexes. Thank you Kalpesh