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Specialized Network Options 281
Table 11.10 Network Distance Limitations Continued
Network Adapter Cable Type Maximum Minimum
Token Ring STP 328 ft. 8 ft.
UTP 148 ft. 8 ft.
ARCnet1 (passive hub)
393 ft. Depends on cable
ARCnet1 (active hub)
1,988 ft. Depends on cable
1. Indicates obsolete for new installations; may be found in existing installations.
Cabling Standards for Fast
Ethernet
Thanks to low costs for cabling, network interface cards, and now
hubs, Fast Ethernet networks can be built today at a cost comparable
to conventional Ethernet networks. Note that the distance limitations
given for 100BASE-TX (the most common type) are the
same as for 10BASE-T. Consider using 100BASE-FX fiber-optic cable
with media converters for longer runs.
Table 11.11 lists the cabling standards for Fast Ethernet.
Table 11.11 100BASE-T Cabling Standards
Standard Cable Type Segment Length
100BASE-TX Category 5 (2 pairs) 100 meters
100BASE-T4 Category 3, 4, or 5 (4 pairs) 100 meters
100BASE-FX 62.5/1251 multimode 400 meters
(2 strands)
1. First figure is core diameter; second figure is cladding diameter; both in micrometers
Properly constructed Fast Ethernet 100BASE-TX Category 5 cable
can be certified for Gigabit Ethernet operation. Gigabit Ethernet
uses all four wire pairs.
Specialized Network Options
The following sections cover specialized networks you might
encounter, including the Home PNA networking and wireless networking
standards.
What About Home Networking?
So-called SOHO (small-office/home-office) users want networks for
Internet connection sharing, printer sharing, and file transfer. To
avoid the cabling problems and protocol configuration and setup
issues of traditional Ethernet networks, the Home Phoneline
Network Association (HomePNA) established the HomePNA 1.0 and
faster 2.0 standards for using existing phone wiring for networking.