Gigabit Ethernet Zach Kokkeler and Jeff Schroeder
Early Adoption • High capacity backbone networks • Not widely used by consumers • Too expensive for desktop use • GbE could not be utilized (PCs too slow) • 20% - 30% network utilization • 200Mbps actual throughput • Unreliable over Cat5 cables
Market Growth • Prices have dropped dramatically • Implementation over Cat5e cabling • Faster PCs WideBand Corporation www.wband.com
Increased Productivity • Through a multitude of technological advances, GbE has provided great advances in data transfer rates. WideBand Corporation www.wband.com
Uses for GbE • Digital photography • Satellite imaging • Faster database access • Streaming video • Real-time file transfers • Back-ups
Media Types • 1000BASE-SX and 1000BASE-LX over fiber. • 1000BASE-T over copper. (1000BASE-CX) • Switched full-duplex only.
GbE over Cat5e • Older standards (10BASE-T and 100BASE-TX) did not use all four pairs of wires. • 5-level pulse amplitude modulation (PAM-5) allows multiple signals to be sent. 125 megapulses per second. Wikipedia
Optical • Optical wiring uses fibers of glass or plastic • Total internal reflection allows rays of light to travel through the core, reflecting off the cladding.
Beyond GbE • Seven different media types • 10GBASE-T over Cat5e, Cat6, and Cat7 • All other media types rely on fiber-optic transmission.
10 GbE and 40 GbE • By using multiplexers with optical wiring, speeds up 40 GbE may be obtained. • With wavelength division multiplexing, separate colors are multiplexed, sent together, and de-multiplexed at the receiving end.
100 GbE • Recent technologies have broken the 100 GbE barrier.
Sources • http://www.nanog.org/ • http://www.wikipedia.org/ • http://www.networkworld.com/ • http://www.hardwaresecrets.com • http://www.internetnews.com