A.Itdividesthenetworkcommunicationprocessintosmallerandsimplercomponents，thusaidingcomponentdevelopment，design，andtroubleshooting.
B.Itenablesequipmentfromdifferentvendorstousethesameelectroniccomponents，thussavingresearchanddevelopmentfunds.
C.Itsupportstheevolutionofmultiplecompetingstandards，andthusprovidesbusinessopportunitiesforequipmentmanufacturers.
D.Itencouragesindustrystandardizationbydefiningwhatfunctionsoccurateachlayerofthemodel.
E.Itprovidesameansbywhichchangesinfunctionalityinonelayerrequirechangesinotherlayers.