▁need ▁significantly ▁higher ▁broad band - spe eds . ▁C ertain ▁broad band ▁techn ologies ▁including ▁F iber - to - the - home ▁( FT TH ), ▁high - speed ▁digital ▁subscri ber ▁line ▁( DS L ) ▁and ▁cable ▁broad band ▁are ▁p aving ▁the ▁way ▁for ▁increased ▁broad band ▁spe eds . ▁F T TH ▁can ▁offer ▁broad band - spe eds ▁that ▁are ▁ten ▁times ▁( or ▁even ▁a ▁hundred ▁times ) ▁faster ▁than ▁D SL ▁or ▁cable . ▁ ▁Internet ▁service ▁prov iders ▁in ▁the ▁Z ett aby te ▁Era ▁ ▁The ▁Z ett aby te ▁Era ▁has ▁affected ▁Internet ▁service ▁prov iders ▁( IS P s ) ▁with ▁the ▁growth ▁of ▁data ▁flow ing ▁from ▁all ▁directions . ▁Cong estion ▁occurs ▁when ▁there ▁is ▁too ▁much ▁data ▁flow ing ▁in ▁and ▁the ▁quality ▁of ▁service ▁( Q o S ) ▁weak ens . ▁In ▁both ▁China ▁and ▁the ▁U . S . ▁some ▁I SP s ▁store ▁and ▁handle ▁ex aby tes ▁of ▁data . ▁The ▁response ▁by ▁certain ▁I SP s ▁is ▁to ▁implement ▁so - called ▁network ▁management ▁practices ▁in ▁an ▁attempt ▁to ▁accommod ate ▁the ▁never - ending ▁data - sur ge ▁of ▁Internet ▁subscri bers ▁on ▁their ▁networks . ▁Furthermore , ▁the ▁techn ologies ▁being ▁implemented ▁by ▁I SP s ▁across ▁their ▁networks ▁are ▁evol ving ▁to ▁address ▁the ▁increase ▁in ▁data ▁flow . ▁ ▁Network ▁management ▁practices ▁have ▁brought ▁about ▁deb ates ▁rel ating ▁to ▁net ▁neutral ity ▁in ▁terms ▁of ▁fair