Building Physical Ethernet LANs with Fiber
The capability of many UTP-based Ethernet standards to use a cable length up to 100 meters
means that the majority of Ethernet cabling in an enterprise uses UTP cables. The distance
from an Ethernet switch to every endpoint on the floor of a building will likely be less than
100m. In some cases, however, an engineer might prefer to use fiber cabling for some links in
an Ethernet LAN, first to reach greater distances, but for other reasons as well. This next sec-
tion examines a few of the tradeoffs after discussing the basics of how to transmit data over
fiber cabling.
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