数据链路 shùjùliànlù data link Definitions Defs Origin Strokes Stroke Words Sentences Sents 数据链路层 shùjùliànlùcéng data link layer The second layer of the OSI model for network communications数据链路连接标识 shùjùliànlùliánjiēbiāozhì data link connection identifier a computer networking term, often abbreviated as DLCI