In high level data link control (HDLC), the part of data station that supports the primary control functions of the data link, generates commands for transmission, and interprets received responses. Specific responsibilities assigned to the primary include initialization of control signal interchange, organization of data flow, and actions regarding error control and error recovery functions. 在高級數据鏈路控制(HDLC)規程中,數据站的一部分,它支持數据鏈路主要控制 功能,產生傳]命令及解釋收到的應答信息。指定給主站的特定職責有控制信郊瘣囿漯 始化、數据流的組q以及涉及差錯控制和差錯恢复的]理。對照secondary。
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