Apple Talk Physical and Data Link Layers
As with other popular protocol suites, such as TCP/IP and IPX, the AppleTalk architecture maintains media-access dependencies on such lower-layer protocols as Ethernet, Token Ring, and FDDI. Four main media-access implementations exist in the AppleTalk protocol suite: EtherTalk, LocalTalk, TokenTalk, and FDDITalk.
These data link; layer implementations perform address translation and other functions that allow proprietary AppleTalk protocols to communicate over industry-standard interfaces, which include IEEE 802.3 (using EtherTalk), Token Ring/IEEE 802.5 (using TokenTalk), and FDDI (using FDDITalk). In addition, AppleTalk implements its own network interface, known as LocalTalk. Figuue 38-6 illustrates how the AppleTalk media-access implementations map to the OSI reference model.
Post a comment