Question : Odd tracert result

I have occesionally seen tracert results like the following and do not understand where the large number is coming from or what would cause it.

I cannot give the whole trace for security reasons but would like an explanation of the 4294967295 result.

Thanks

Code Snippet:

1: 2: 3: 4: 5: 6: 7: 8: 9: 10: 11: 12: 13: 14: 15:

5 4294967276 ms 4294967266 ms 4294967276 ms ae-32-52.ebr2.miami1.level3.net [4.69.138.126] 6 4294967283 ms 4294967280 ms 4294967281 ms ae-2.ebr2.atlanta2.level3.net [4.69.140.142] 7 4294967293 ms 4294967280 ms 4294967280 ms ae-63-60.ebr3.atlanta2.level3.net [4.69.138.4] 8 4294967294 ms 1 ms 2 ms ae-2.ebr1.washington1.level3.net [4.69.132.86] 9 4294967294 ms 4294967295 ms 1 ms ae-61-61.csw1.washington1.level3.net [4.69.134.130] 10 4294967294 ms 4294967294 ms 31 ms ae-13-69.car3.washington1.level3.net [4.68.17.5] 11 31 ms 31 ms 4294967293 ms savvis-level3-te.washington1.level3.net [4.68.110.102] 12 4294967295 ms 4294967295 ms 4294967294 ms cr1-tengig0-7-2-0.washington.savvis.net [204.70.197.242]

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Answer : Odd tracert result

Bumped points as I would really like to find a solution for this.