Tare da haɓaka gabaɗaya da aikace-aikacen fasahar cibiyar sadarwa, haɓakar masu sauyawa ya kuma sami manyan canje-canje.Maɓalli na farko sun samo asali daga sauƙaƙan sauƙaƙan maɓalli zuwa Layer 2 switches, sannan daga Layer 2 ya canza zuwa Layer 3.Don haka, menene aLayer 3 canza?

Layer 3 canzawaHaƙiƙa sune fasahar sauya fasalin Layer 2 + fasahar turawa Layer 3.Ba yana nufin cewa akwai "launi uku" na masu sauyawa ba.ALayer 3 canzacanji ne tare da wasu ayyukan na'ura mai ba da hanya tsakanin hanyoyin sadarwa.Mafi mahimmancin manufarLayer 3 canzashine don sauƙaƙe musayar bayanai a cikin babban LAN.Hakanan aikin da yake da shi yana ba da sabis don wannan dalili, kuma ana iya sarrafa shi sau ɗaya kuma a tura shi sau da yawa.

Fasahar sauyawa a cikin ma'anar gargajiya tana aiki a kan Layer na biyu na samfurin daidaitaccen tsarin cibiyar sadarwa na OSI - Layer link Layer, yayin da fasaha mai sauyawa uku ya kammala babban saurin isar da fakitin bayanai a Layer na uku na samfurin hanyar sadarwa.Haɗin kai na lokaci-lokaci kamar isar da fakitin bayanai ana cika su da sauri ta hanyar kayan aiki, amma ayyuka kamar haɓaka bayanai, kulawar tebur, lissafin tuƙi, da tabbatar da hanyar sadarwa ana kammala su ta software.Ba wai kawai zai iya gane aikin tuntuɓar hanyar sadarwa ba, har ma ya tabbatar da mafi kyawun aikin cibiyar sadarwa don yanayin cibiyar sadarwa daban-daban.