Information processing systems. Fibre Distributed Data Interface (FDDI) - Media access control-2 (MAC-2)
Information processing systems. Fibre Distributed Data Interface (FDDI) - Media access control-2 (MAC-2)
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1 Scope This part of ISO/IEC 9314 specifies the Media Access Control ( MAC ), the middle sublayer of the Data Link Layer (DLL), for Fibre Distributed Data Interface (FDDI). FDDI (ISO/IEC 9314) provides a high-bandwidth (100 Mbit/s), general-purpose interconnection among information processing systems, subsystems and peripheral equipment, using fibre optics or other transmission media. FDDI can be configured to support a sustained data transfer rate of at least 80 Mbit/s (10 Mbyte/s). FDDI provides connectivity for many nodes distributed over distances of many kilometres in extent. Certain default parameter values for FDDI (e.g. timer settings) are calculated on the basis of up to 1 000 transmission links or up to 200 km total fibre path length (typically corresponding to 500 nodes and 100 km of dual fibre cable, respectively); however, the FDDI protocols can support much larger networks by increasing these parameter values. As shown in figure 1, ISO/IEC 9314 consists of
a) A Physical Layer (PL), which is divided into two sublayers:
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