NEW YORK--(BUSINESS WIRE)--Fitch Ratings has affirmed at 'AAAsf' the senior notes issued by Nelnet Student Loan Trust Series 2005-1. In addition, Fitch has affirmed the subordinate note at 'Asf'. The Rating Outlook remains Stable for all notes. KEY RATING DRIVERS High Collateral Quality: The trust collateral consists of 100% of Federal Family Education Loan Program (FFELP) loans. The credit quality of the trust collateral is high, in Fitch's opinion, based on the guarantees provided by the tran