IEEE 802.3u (Fast Ethernet) LAN Standards

The IEEE 802.3u LAN Standards, also known as FAST ETHERNET, are defined as follow:


100BaseT4

>> Medium: Twisted Pair Cat.3 (UTP four pairs);
>> Maximum length per segment: 100 m;
>> Topology: Star;
>> Working Mode: half-duplex;


100BaseT

>> Medium: Twisted Pair Cat.5 (UTP two pairs);
>> Maximum length per segment: 100 m;
>> Topology: Star;
>> Working Mode: full-duplex;


100BaseF

>> Medium: Optical Fiber 2MM (2 strands);
>> Maximum length per segment: 2 km;
>> Topology: Star;
>> Working Mode: full-duplex;




802.3z Standards have:

Data Rate: 100 Mbps;
Coding:
>> 8BGT coding;
>> 4B5B coding;