What a Gigabit?

Gigabit Ethernet is an extension of the IEEE 802.3 Ethernet standard, with a transmission speed of 1000 megabits per second (that is, 1 Gbps). Initially applied to large campus networks, it can connect existing 10Mbps Ethernet and 100Mbps Fast Ethernet. It can replace 100Mbps FDDI network and is also a strong opponent of ATM technology.

Gigabit Ethernet

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Gigabit Ethernet is an extension of the IEEE 802.3 Ethernet standard, with a transmission speed of 1000 megabits per second (that is, 1 Gbps). Initially applied to large campus networks, it can connect existing 10Mbps Ethernet and 100Mbps

Gigabit Ethernet uses the same CSMA / CD protocol and the same frame format, which is the most natural upgrade path for existing Ethernet, so that users' investment in Ethernet's original equipment management tools can be protected.

Gigabit Ethernet is another option for ultra-high-speed backbone networks. In terms of data, voice, video and other real-time services, although it cannot provide real quality of service (QoS), but Gigabit Ethernet has a high bandwidth, which can overcome some of the original Ethernet

The Gigabit Ethernet Alliance (GEA) proposes the following solutions for the application of Gigabit Ethernet:

* Update fast Ethernet backbone network: Replace the core switch to comprehensively improve the original network performance.

* For switch-to-server links: The server uses a Gigabit Ethernet card, which is directly connected to the Gigabit Ethernet switch, providing a processing capacity of one million packets per second.

* Gigabit Ethernet to desktop desktop. The high-performance workstation is installed with a Gigabit Ethernet card and is directly connected to the Gigabit Ethernet.

* Used for links between switches. Gigabit Ethernet switches are connected with optical fibers to provide a high-performance backbone line.

* Update FDDI trunk: keep existing fiber optic cable and increase bandwidth 10 times

The IEEE802.3Z working group has determined the following set of specifications, collectively referred to as 1000Base-X.

1000Base-LX: Multi-mode fiber transmission distance is 550 meters, and single-mode fiber transmission distance is 3000 meters.

1000Base-SX: 62.5 micron multimode fiber transmission distance is 300 meters, 50 micron multimode fiber transmission distance is 550 meters.

1000Base-CX: used for short-distance equipment connection, using high-speed twisted-pair copper cables, with a maximum transmission distance of 25 meters.

1000Base-T: Category 5 copper cable has a maximum transmission distance of 100 meters.