3 Yes Yes
Suitability for
fi ber based
implementation
Average Poor Good Excellent
TABLE 1.2 Comparison of Key LAN Technologies During the Late 1980s and Early 1990s)
Figure 1.5 The domination of Ethernet in the LAN versus Token Ring (source: Dell??™Oro Group, 2005)
Total Ethernet Total Token Ring
Ports (Thousands)
400,000
350,000
300,000
250,000
200,000
150,000
100,000
50,000
0
1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004
Ethernet: From LAN to the WAN 17
mostly by the growing popularity of the personal computer. Technologies such as Token
ring and FDDI especially were taking a big share of the market. However, the fortunes
of Token ring and others waned with the declining fortunes of its sponsors (IBM), while
Ethernet with its unique business model and open standards continued to appeal. And
so when the third stage came about, sometime after the mid-1990s when the proliferation
of PCs continued unabated (thanks to Moore??™s law) and networking applications such as
e-mail emerged along with the introduction and growth of the Internet, Ethernet had
already begun to establish its dominance. And by 2000, as Figure 1.
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