network basis  about networks ETHERNET the first name was 'ALTO ALOHA'; it was invented by Bob Metcalfe in 1972 at PARC. ethernet use CSMA/CD (Carrier Sense Multiple Access / Collision Detection) protocol. ethernet was stardized by IEEE in documents: 802.1 - Internetworking 802.2 - The new message format for data on any LAN (LLC) 802.3 - Hardware standards for Ethernet cards and cables CSMA/CD 802.4 - Token Bus LAN 802.5 - Hardware standards for Token Ring LAN 802.6 - MAN (Metropolitan Area network) 802.7 - Broadband Technical Advisory Group 802.8 - Fiber-Optical Technical Advisory Group 802.9 - Integrated Voice / Data Networks 802.10 - Network Security 802.11 - Wireless Networks 802.12 - Demand Priority Access LAN, 100 Base VG protocol name speed cable, connection 10Base5 coaxial, Thicknet 10Mbit/sec coaxial 10mm cable, cable -> vampire connector -> MAU -> AUI -> DB-15 connector -> NIC 10Base2 coaxial (Thinnet) 10 Mbit/sec coaxial cable, BNC (RJ-58) 10BaseT ethernet 10 Mbit/sec UTP cable categ 3 or upper, RJ-45 10BaseFL fiber optic 10Mbit/sec double fiber optic (Tx & Rx for max 2000 meter), 100BaseTX fast ethernet 100 Mbit/sec UTP cable categ 5 or upper, RJ-45 100BaseFX fiber-cabled ethernet 100Mbit/sec fiber optic multi-mode, 1000BaseT gigabit ethernet 1000Mbit/sec UTP cable categ 5E, RJ-45 - 'Thin Wire', 50Ohm Coaxial Cable RJ-58 U/A (BNC connectors) (10Base2) max 185 m @ 10Mbps, with max 30 hosts at min 0,5 m each others. bus and star topology. it needs T connectors with at extremes 'terminators'. - Unshielded Twisted Pairs RJ-45 (10BaseT, 100BaseT, 1000BaseT) max 100 m @ 10Mbps, signal has 20 MHz numeration scheme: color scheme 1 white orange 2 orange 3 white green 4 blue 5 white blue 6 green 7 white brown 8 brown main old stardard and protocols are: - Novell networks - SNA - DECNET - NETBEUI - Xerox DIX system aui to aui cable  links  pictures  list of files hosted   AUI connector.htm   AUI_Cable.htm   aui_2_aui.txt   c1.jpg   w11.jpg   w12.jpg legend directory binary, exec web html file image file ps, pdf archive file text file other >> go on top <<

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