D-Link DFE-538TX — основы технологии Fast Ethernet: повышение скорости сети до 100Mbps [6/64]

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Technology Basics

About Fast Ethernet

Fast Ethernet is a network technology specified by IEEE Standard 802.3u. It

extends the traditional 10Mbps Ethernet technology to achieve 100Mbps

transmission and reception, while retaining the same CSMA/CD 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, Fast Ethernet is the

clear choice in terms of cost-effectiveness, as well as convenience and smoothness

in transition.

Category 5 cabling is required for 100Base-TX Fast Ethernet in order to provide full

duplex operation. Full duplex 100Base-TX operation allows simultaneous

transmission and reception, both at 100Mbps, thus providing service potentially

equal to 200Mbps full-duplex service.

To provide compatibility in traditional 10Mbps Ethernet environments (where, for

example, DFE-538TX adapters are installed anticipating upgrade of supporting

switch equipment to Fast Ethernet), the DFE-538TX also supports traditional

10Mbps Ethernet operation, in full-duplex as well as half-duplex modes. Selection

of the best operation mode in any given installation is automatically governed by

auto-negotiation.