A lokacin da Ethernet sauya sanya wannan a ba batun (saboda kowane canji tashar jiragen ruwa ne a karo yankin), da hankali ya juya zuwa rage girman data link Layer watsa yankin. VLANs aka farko amfani da su raba da dama watsa yankin fadin daya jiki matsakaici. A VLANs kuma iya zama da amfani ga ƙuntata damar yin amfani da hanyar sadarwa albarkatun ba tare da la'akari da jiki topology na cibiyar sadarwa. VLANs aiki a data link Layer na OSI model. Administrators sau da yawa saita a VLAN zuwa taswira kai tsaye zuwa wani IP cibiyar sadarwa, ko subnet, wanda ya ba da bayyanar da cibiyar sadarwa Layer. Kullum, VLANs a cikin wannan kungiyar za a sanya daban-daban wadanda ba a overlapping cibiyar sadarwa adiresoshin ba tare da removing daban-daban ba. Wannan ba wani batun da ake bukata na kowane VLANs tare da raba IP adiresoshin. Tambaya 190.16: Abin da ya sa VLANs ba zai yiwu a yi haka ba tare da kowane VLANs raba raba.
sau da yawa segmented jiki LANs da nufin rage girman da Ethernet karo yankin