192PPP配置 PPP Architecture oSI layer 3 Upper-layer protocols (such as IP, IPX, Apple Talk Network Control Protocol(NCP) (specific to each network-layer protocol) Link Control Protocol(LCP) High-Level Data Link Control(HDLc) Physical Layer (such as EIA/TIA-232, V24, V.35, ISDN)19.2 PPP配置 PPP Architecture OSI layer Physical Layer (such as EIA/TIA-232, V.24, V.35, ISDN) High-Level Data Link Control (HDLC) Link Control Protocol (LCP) Network Control Protocol (NCP) (specific to each network-layer protocol) Upper-layer protocols (such as IP, IPX, AppleTalk) 3 2 1