Efanetikusinthandi mtundu wakusinthayomwe imatumiza deta yochokera pa Efaneti, ndi Efaneti ndi njira yogawana media yotumizira mabasi. Kapangidwe ka Ethernetkusintha: doko lililonse la Ethernetkusinthaimalumikizidwa mwachindunji ndi wolandirayo, ndipo nthawi zambiri imakhala mumtundu waduplex. Thekusinthaimathanso kulumikiza ma doko angapo nthawi imodzi, kotero kuti gulu lililonse la makamu omwe amalumikizana amatha kutumiza deta popanda mikangano. Efanetikusinthandiyenso ntchito yotchuka kwambiri, ndipo mtengo wake ndi wotsika mtengo. Chifukwa chake, gawo logwiritsira ntchito ndi lalikulu kwambiri, ndipo ma switch a Efaneti amatha kuwoneka mu ma LAN akulu ndi ang'onoang'ono. Kusintha kwa Ethernet nthawi zambiri kumakhala ndi madoko angapo mpaka angapo. M'malo mwake, ndi mlatho wamadoko ambiri. Kuonjezera apo, mlingo wake wa doko ukhoza kukhala wosiyana, ndipo mawonekedwe ake ogwira ntchito angakhalenso osiyana, monga kupereka 10M ndi 100M bandwidth, kupereka theka-duplex, full-duplex, ndi modes adaptive work modes. Mfundo ya Ethernetkusintha: Efanetikusinthandi makina pa data link layer. Ethernet imagwiritsa ntchito ma adilesi (adilesi ya MAC), 48 bits, ndi 6 byte. Mfundo yake yogwirira ntchito ndi yakuti pamene chimango chowulutsa chikalandiridwa, chidzatumiza ku madoko onse kupatula doko lolandira. Chimango cha unicast chikalandiridwa, yang'anani adilesi yomwe ikupita ndikugwirizana ndi tebulo la adilesi ya MAC. Ngati pali adilesi yopitira, itumizidwa. Ngati palibe, idzasefukira (kuwulutsa). Pambuyo pa kuwulutsa, ngati palibe wolandira yemwe adilesi yake ya MAC ili yofanana ndi adilesi ya MAC ya chimango, idzatayidwa. Ngati pali wolandila yemwe adilesi ya MAC ili yofanana, idzawonjezedwa patebulo lake la adilesi ya MAC.
