Gigabit Ethernet

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Gigabit Ethernet

An Ethernet standard that transmits at 1 gigabit per second. Gigabit Ethernet (GbE, GE) connects PCs and servers in local networks and is commonly employed along with a mix of 10/100 Mbps devices. For example, a 10/100/1000 switch supports all three rates and adjusts to the highest speed between sender and receiver. All new computers and most network devices support Gigabit Ethernet.

GbE transmits full duplex from point to point using Ethernet switches and half duplex in a shared Ethernet hub environment (see CSMA/CD).

IEEE 1000Base-T (802.3ab)
The 1997 standard (IEEE 802.3z) required multimode fiber or shielded copper cables, but two years later, 1000Base-T enabled GbE to run on ordinary Cat 5 copper and be readily used in existing networks. Four wire pairs each transmit 250 Mbps in both directions.

TIA 1000Base-TX
A competing standard created by the TIA that never caught on used simpler electronics but required Cat 6 cabling. However, 1000Base-T is often erroneously labeled 1000Base-TX. See Ethernet and 10 Gigabit Ethernet.

COPPER CABLEEncoding   Cable  RangeStandard     Method     Type  (meters)1000Base-T802.3ab      4D-PAM5  Cat5-UTP  100

   1000Base-TXTIA/EIA-854  4D-PAM5  Cat6-UTP  100

   1000Base-CX802.3z       8B/10B   Cat1-STP   25

   OPTICAL CABLE (8B/10B Encoding)Fiber            ModalDiameter       Bandwidth   Range(microns)      (MHz-km)   (meters)1000Base-SX 802.3z
   62.5 multimode   160        220
   62.5 multimode   200        275
   50 multimode     400        500
   50 multimode     500        550

   62.5 multimode   500        550
   50 multimode     400        500
   50 multimode     500        550
    9 singlemode    ---       5000
References in periodicals archive ?
Force10's new S55 delivers on that requirement while rounding out the company's line of high-performance 1/10 GbE ToR switches and paves the way for an expanded set of 10/40 GbE offerings in the future.
The Napatech NT40E2-1 is the first 40 GbE network adapter on the market with intelligent features that allow frame decoding, intelligent flow detection and distribution to up to 32 CPU cores, which can off-load and accelerate the performance of network appliances.
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In conjunction with the deployment of 120 8x10G Series blades, which doubles the Brocade MLX capacity threshold to 256 wire-speed 10 GbE ports in a single chassis, AMS-IX has more than met its objectives.
Our customers are implementing the new LSI GbE PHY to meet those demands today.
As our research and education customers require increasingly more network capacity to support their research projects, technologies such as 100 GbE can help them scale their networks quickly and efficiently," said Opher Kahane, senior vice president and general manager of the High End Systems Business Unit at Juniper Networks.
GbE is Ethernet that provides speeds of one billion bits per second.
For more information about ADC's solutions to support 100 GbE and 40 GbE go to http://www.
The most significant difference between the two OSN secondary storage solutions is that with the OSN GbE solution, the NDMP server functionality is distributed by being embedded directly within the tape library.
To help its data center customers to consolidate and simplify network layers, Force10 is currently preparing to deliver end-to-end, edge-to-core 40 GbE switch/router solutions.
Our new GbE Controller and Switch solutions set new benchmarks in footprint, power consumption and price.
the global technology leader that data center, service provider and enterprise customers rely on when the network is their business, today announced that the company plans to incorporate 40 Gigabit Ethernet (40 GbE) into its switch/router solutions to provide the most economical incremental step from 10 GbE for dynamic data centers.