between category 5e and category 6 is in the transmission performance,and extension pf the available bandwidth from 100Mhz for category 5e to 250Mhz for categoty6, this includes better insertion loss,near end crosstalk(NEXT),return loss,,and equal level far end crosstalk(ELFEXT)These improvements provide a higher sighal-to-noise ratio,allowing higher reliability for current applications and higher data rates for fitire applications.

Applications: 

  Gigabit Ethernet

  ATM 622 or higher

  Broadband Video(77 s 550MHz)