ocr: IEEE 802.9 PROTOCOL ARCHITECTURE IEEE 802.9 OSI 802 Appropriate - Ss Layer 2 LAPD Data- Protocol for Link - - sochronous Service (B,C) (D] Layer Hybrid Multiplexing (MUX) Layer Mgmt. Physical Signaling (PS] Physical Entity Layer Physical Media Dependent (PMD) Physical edum - FIGURE 2: Like other JEEE LAN standards, the IEEE 802.9 protocol architecture corresponds to the Physical and Data-Link layers (DLL) off the OSlreference model.