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UGC NET CSE | December 2014 | Part 3 | Question: 29

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HDLC(high level data link control) is a classical  bit oriented  code-transparent synchronous data link layer protocol developed by theInternational Organization for Standardization (ISO) protocol

HDLC provides both connection-oriented and connectionless service.

HDLC can be used for point to multipoint connections, but is now used almost exclusively to connect one device to another, using what is known as Asynchronous Balanced Mode (ABM)

refer https://en.wikipedia.org/wiki/High-Level_Data_Link_Control 

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