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11
Introduction
Thank you for choosing D-Link DFE-500TX, the value leader among Fast
Ethernet adapters for PCI−Bus personal computers. This Introduction chapter
will be useful if you are new to Fast Ethernet and other new technology
featured by the DFE-500TX. Otherwise, skip ahead to the Installation chapter.
About Fast Ethernet
Fast Ethernet is a network technology specified by IEEE Standard 802.3. It
extends the traditional 10Mbps Ethernet technology to achieve 100Mbps
transmission and reception, while retaining the same CSMA/CA Ethernet
protocol. Thus while Fast Ethernet provides a tenfold increase in network
capacity, it is wholly compatible with traditional 10Mbps Ethernet network
facilities. This compatibility is the key to easy and efficient upgrades to
100Mbps in your network areas needing greater bandwidth. Upgrading
selected areas to Fast Ethernet does not require hardware or software changes
in network areas where traditional 10Mbps Ethernet is providing good service.
For upgrading existing Ethernet installations to 100Mbps, and especially for
selectively upgrading areas needing upgrade, Fast Ethernet is the clear choice in
terms of cost-effectiveness, as well as convenience and smoothness in
transition.
Fast Ethernet comprises two subtypes: 100Base-T4 and 100Base-TX.
100Base-T4 Fast Ethernet can utilize existing Category 3 or Category 4 UTP
network cabling, but does not provide for full duplex operation. 100Base-TX
requires Category 5 cabling, but does provide full duplex operation. Full duplex
100Base-TX operation allows simultaneous transmission and reception, both at
100Mbps, thus providing service potentially equal to 200Mbps half-duplex
service.