DCE：Data Terminal Equipment，數(shù)據(jù)電路終端設(shè)備。關(guān)聯(lián)詞：DTE

DDN：Digital Data Network，數(shù)字?jǐn)?shù)據(jù)網(wǎng)

DLCI：data link control identifier，數(shù)據(jù)鏈路控制標(biāo)識(shí)符

DTE：Data Circuit-terminating Equipment，數(shù)據(jù)終端設(shè)備。關(guān)聯(lián)詞：DCE

DXC：Digital Cross Connector，數(shù)字交叉連接器