unreferenced date January 2011 Image 10base2 cable.png thumb right 10BASE2 cable showing BNC Connector end. Image 10base2 t piece.png thumb right 10BASE2 cable with BNC T Connector. Image 10base2 terminator.png thumb right 10BASE2 cable end Terminator. Image RG 59.jpg thumb right Coaxial cable is used to transmit 10BASE 2 Ethernet Image Ead outlet.jpg thumb right EAD outlet Image AAUI examples.jpg thumb right Different types of T Connectors, with AAUI s 10BASE2 also known as cheapernet , thin Ethernet , thinnet , and thinwire is a variant of Ethernet that uses thin coaxial cable RG 58 RG 58A U ... cable, and the popularity of 802.11 wireless networks, both 10BASE2 and 10BASE5 have become increasingly ... The name 10BASE2 is derived from several characteristics of the physical medium. The 10 comes from ... design 10BASE2 coax cables had a maximum length of 185 meters 607 ft . The maximum practical number of nodes that can be connected to a 10BASE2 segment is limited to 30. In a 10BASE2 network ... with the least resistance. When wiring a 10BASE2 network, special care has to be taken to ensure .... For this reason, 10BASE2 networks could be difficult to maintain and were often replaced by Ethernet ... has been established by the introduction of EAD socket s. Comparisons to 10BASE T 10BASE2 ... but these never became widespread, possibly due to a lack of standardization. 10BASE2 systems ... be sourced from the nearest computer. These characteristics mean that 10BASE2 is ideal for a small .... Unfortunately for 10BASE2, by the time multiple home computer networks became common, the format ... 10BASE2 compatible network cards as distinct pieces of equipment, and integrated LAN controllers ... Commons category 10BASE2 10BASE5 thicknet 10BASE T Local area network Electrical termination Computer ... DEFAULTSORT 10base2 Category Ethernet cs 10Base2 de 10BASE2 et 10Base2 es 10Base2 fr 10BASE2 id 10BASE2 it 10Base2 mk 10BASE2 pl 10BASE2 pt 10BASE2 ru 10BASE 2 sr fi 10Base2 ... more details
Image Apple AAUI transceiver and cable.jpg thumb right 300px Apple AAUI Transceiver for 10BASE2 with cable Image AAUI examples.jpg thumb right 300px 2x AAUI combo Tranceivers for 10BASE T and 10BASE 2 Linksys MACT2T & LL8 LEENET C , and one AAUI that is actually a 3 port hub Farallon Image Asante aaui.jpg thumb right 300px AAUI Tranceiver for 10BASE T Apple Attachment Unit Interface AAUI is a mechanical re design by Apple Inc. Apple of the standard Attachment Unit Interface AUI used to connect Ethernet transceiver s to computer equipment. AUI was popular in the era before the dominance of 10BASE T networking that started in the early 1990s AAUI was an attempt to make the connector much smaller and more user friendly. FriendlyNet AAUI was part of a system of Ethernet peripherals that tried to make connecting to Ethernet much easier. At the time, Ethernet systems usually were 10BASE2 , also known as thinnet. Apple s system was called FriendlyNet. A FriendlyNet 10BASE2 system did not use BNC T connectors or separate 50 Ohm Electrical termination terminators . Instead of a single BNC connector that was inserted into a T connector placed inline in the cable, the AAUI transceiver had two BNC connectors, one on each side to which the cables were attached. The transceiver would automatically terminate the network if a cable was not attached to one of the sides. Additionally, Apple 10BASE2 cables would terminate the network if no device was attached to them. Thus the number of mistakes that could be made hooking up a thinnet network was reduced considerably. Since any of these mistakes ..., AAUI held no advantage for any system other than 10BASE2 and thus as 10BASE T became ubiquitous ... 10BASE2 cabling, including T connectors and manual termination. Additionally, Apple s 10BASE2 ... Apple and non Apple 10BASE2 devices, there were many seemingly natural configurations of cables ... the value of the complex and proprietary Apple 10BASE2 wiring system. Connector and signals ... more details
Unreferenced date December 2006 Image 10base2 terminator.png thumb right 10BASE2 cable end Terminator. Electrical termination of a Signalling telecommunication signal involves providing a terminator at the end of a wire or cable to prevent an Radio frequency RF signal from being reflected back from the end, causing Interference communication interference . The terminator is placed at the end of a transmission line or Daisy chain electrical engineering daisy chain Electrical bus bus such as in SCSI , designed to impedance matching match Characteristic impedance impedance and hence minimize signal Reflection electrical reflections . Types of terminators Passive Passive terminators consist of a simple resistor . Limited usage for highspeed applications. There are two types a resistor between signal and ground like in Ethernet, or a resistor from the positive rail to signal and a resistor from the signal to negative rail like in SCSI . Active Active terminators consist of a Linear regulator voltage regulator that keeps the voltage used for the terminating resistor s at a constant level. Forced Perfect Termination FPT Forced Perfect Termination can be used on Single ended signalling single ended buses where diode s remove Overshoot signal over and undershoot conditions. The signal is locked between two actively regulated voltage levels, which results in superior performance over a standard active terminator. Applications File SCSI terminator exposed hdr 0a.jpg thumb right SCSI terminator. SCSI All parallel SCSI units use terminators. SCSI is primarily used for storage and backup. Controller Area Network Controller area network , commonly known as CAN Bus, uses terminators consisting of a 120 ohm resistor. Dummy load Main Dummy load Dummy loads are commonly used in HF to EHF frequency circuits. Ethernet coaxial 50 ohm Ethernet terminator redirects here 10BASE2 networks absolutely ... used for internet connections however RG 6 should not be used for 10BASE2 which should use RG ... more details
Image Ead outlet.jpg thumb EAD outlet EAD is an abbreviation for German Ethernet Anschlussdose . The EAD standard defines wall mounted Ethernet connection outlets that enjoy a higher reliability than standard BNC connector BNC T connectors . EAD outlets have been developed from TAE connector s for telephony applications but they are intended for connecting coaxial network cables like 10BASE2 . A different mechanical encoding Type E prevents mix up with phone plugs. EAD cables are duplex connections replacing two thin wire cables. The contacts of an EAD outlet are closed if no connector is plugged in. When a cable is plugged in, the normally closed contacts in the socket are opened so that signals pass through the loop cable. Links http www.itwissen.info index.php?aoid 7016&id 31 Description of the EAD system at itwissen.info in German Dead link date December 2009 Ethernet Category Coaxial connectors Category Ethernet cables de Ethernet Anschlussdose ... more details
applies only to 10BASE5 and 10BASE2 Ethernet segments. ref cite title An Educator s Guide to School ... when 10BASE5 and 10BASE2 were the only types of Ethernet network available. The rule only applies ... more details
RG 58 U is a type of coaxial cable often used for low power signal and Radio Frequency RF connections. The cable has a characteristic impedance of either 50 or 52 Ohm unit . RG was originally a unit indicator for bulk RF cable in the U.S. military s Joint Electronics Type Designation System . There are several versions covering the differences in core material solid or braided wire and shield 70 to 95 coverage . The outside diameter of RG 58 is around 0.2 inches 5 mm . Plain RG 58 cable has a solid center conductor. The RG 58A U features a flexible 7 or 19 strand center conductor. Most two way radio communication systems, such as marine, CB radio , amateur radio amateur , police, fire, Wireless LAN WLAN antennas etc., are designed to work with a 50 cable. RG 58 cable is often used as a generic carrier of signals in laboratories, combined with BNC connector s that are common on test and measurement equipment such as oscilloscope s. RG 58 in versions RG 58A U or RG 58C U was once widely used in thin Ethernet 10BASE2 , where it provides a maximum segment length of 185 meters. However, it has been almost completely replaced by twisted pair cabling such as category 5 and similar cable in data networking applications. RG 58 cable can be used for moderately high frequencies. Its signal attenuation depends on the frequency, e.g. from 0.11 dB m at 50 MHz to 1.4 dB m at 2 GHz. ref http www.bcar.us cablespec.htm Coaxial Cable Loss and Dynamics by Benton County ARES RACES ref References references See also RG 59 A similar cable but with an impedance of 75 Coaxial cable BNC connector common connector for RG 58 cables Category Signal cables Electron stub ... more details
VAXmate was an IBM compatible IBM PC AT compatible personal computer introduced by Digital Equipment Corporation in September, 1986. The replacement to the Rainbow 100 , in its standard form it was the first commercial diskless personal computer. OS and files The operating system and files would normally served from a VAX VMS server running the company s Pathworks VAX VMS Services for MS DOS software , which went through several name changes, finally becoming Pathworks . Alternatively an optional expansion box containing either 20 MB or 40 MB hard disk could be purchased which allowed it to operate as a more conventional stand alone PC. Original Price The basic system contained an 8 MHz Intel 80286 CPU with 1 Mbyte of RAM, a 1.2 MB RX33 5 inch floppy disk drive, a 14 inch diagonal amber or green monochrome cathode ray tube CRT and a 10BASE2 thinwire Ethernet interface all contained in the system unit. It was also provided with a parallel printer port and a serial communications port. A separate mouse and LK250 keyboard was used with the device. As well as the expansion box, an Intel 80287 80287 MHz numeric coprocessor could be ordered as an option, and the memory could be expanded by 2 MB with another option to 3 MB. In North America, an internal modem was also available. DECstation It was superseded by the DECstation 200 and 300 in January 1989. References cite book url http vt100.net mirror hcps pc500td1.pdf title VAXmate technical description publisher Digital Equipment Corporation ID part number EK PC500 TD 001 year 1987 Notes references External links http research.microsoft.com gbell Digital timeline 1986 3.htm VAXmate at research.microsoft.com DEC hardware Category IBM PC compatibles Category DEC hardware Category 1986 introductions ... more details
nofootnotes date August 2009 File Sparcstation ipc 01.jpg thumb A SPARCstation IPC workstation. SPARCstation IPC is a workstation sold by Sun Microsystems . It is based on the sun4c architecture, and is enclosed in a lunchbox chassis. Specifications CPU support The SPARCstation IPC incorporate a Fujitsu MB86901A or a LSI L64801 25 MHz processor. The SPARCstation IPC is limited to use as a single processor machine. Memory The SPARCstation IPC has twelve DSIMM slots for memory expansion. Slots can be filled individually giving a maximum of 48Mb memory. Disk drives The SPARCstation IPC can hold one internal 50 pins, single ended, fast narrow SE SCSI drives and a floppy. It also supports external SCSI devices. There is no IDE ATAPI support. Network support The SPARCstation IPC comes with an on board AMD Lance ethernet chipset providing 10Base2 and 10Base5 via an Attachment Unit Interface AUI transceiver. The OpenBoot ROM is able to boot from network, using RARP and TFTP. Like all other SPARCstation systems, the IPC holds system information such as MAC address and serial number in NVRAM. If the battery on this chip dies, then the system will not be able to boot. Operating systems The following operating systems will run on a SPARCstation IPC SunOS 4.0.3c onwards Solaris Operating Environment Solaris 2.0 to Solaris 7 Linux Some but not all distribution still support this SPARC32 sub architecture NetBSD sparc32 since 1.0 OpenBSD sparc32 See also SPARCstation SPARCstation 5 External links http www.obsolyte.com sun ipc Obsolyte SPARCstation IPC http www.sunstuff.org hardware systems sun4 sun4c SPARCstationIPC Parts List for SPARCstation IPC http sunsolve.sun.com handbook pub validateUser.do?target Systems Sun4c CPU Station IPC SunSolve Documentation Category Sun workstations Category SPARC microprocessor products ... more details
A network segment is a portion of a computer network . The nature and extent of a segment depends on the nature of the network and the device or devices used to interconnect end stations. ref cite web url http www.linfo.org network segment.html title Network Segment Definition date 2 October 2005 accessdate 2010 09 03 ref Ethernet According to the defining IEEE standards for Ethernet, a network segment is an electrical connection between networked devices. ref cite section 1.4.318 quote segment The medium connection, including connectors, between Medium Dependent Interfaces MDIs in a CSMA CD local area network. publisher IEEE title 802.3 2008 Part 3 Carrier sense multiple access with Collision Detection CSMA CD Access Method and Physical Layer Specifications date 26 December 2008 ref In the original 10BASE5 and 10BASE2 Ethernet varieties, a segment would therefore correspond to a single coax cable and any devices tapped into it. At this point in the evolution of Ethernet, multiple network segments could be connected with repeaters in accordance with the 5 4 3 rule to form a larger collision domain . By the IEEE definition, on modern twisted pair Ethernet , a network segment would correspond to the individual connection between end station to network equipment i.e. repeater , Ethernet hub hub or Network switch switch or the connections between different pieces of network equipment. Although the above definition would indicate that, through the use of repeaters or hubs, it is possible to have multiple network segments within a collision domain, the term is sometimes used as a synonym for collision domain . ref cite web url http www.linktionary.com s segment.html title Segment Network accessdate 2010 09 03 ref ref cite web url http compnetworking.about.com od networkdesign l bldef segment.htm title Segment accessdate 2010 09 03 ref Token ring All end stations connected to the same Media Access Unit for token ring are part of the same network segment. Citation needed da ... more details
twisted pair twisted pair Ethernet is generally more robust than coaxial cable based Ethernet e.g. 10BASE2 ... and deal with loops, for example by implementing the spanning tree protocol . A hub with a 10BASE2 port can be used to connect devices that only support 10BASE2 to a modern network. The same goes ... more details
Image Cisco 1900 switch inside.jpg 250px right thumbnail The inside of a Cisco 1900 series switch The Cisco Catalyst 1900 is a 19 rack mountable, managed configurable 10baseT Ethernet switch with 100baseTX 100baseFX uplink ports. This product was popular in small office networks because of its features and price. This switch was sold until 2002, reaching end of life EOL in 2007 and is no longer supported by Cisco ref http www.cisco.com en US prod collateral switches ps5718 ps597 prod end of life notice0900aecd8055eb4d.html ref . Models The switch was available in 12 port and 24 port models with either two 100baseTX uplink ports or one fibre and one copper 100 Mbit s uplink ports. In addition to this, one Attachment Unit Interface AUI port was available on the rear panel for connecting to fiber or legacy 10Base2 or 10Base5 networks. This switch is closely related to the Cisco Catalyst 2820 series, which uses the same software, and shares many of the same features Software The 1900 series software was available in two editions. Whilst the enterprise edition s Command Line Interface CLI had a strong similarity to Cisco IOS IOS , the switches ran a unique software which was neither IOS or CatOS . Standard Edition Menu based configuration. No CLI access available. Could be software upgraded to Enterprise Edition. Enterprise Edition Same as standard but with extra features enabled. CLI access is possible. The last software version released was 9.00.07 2003 . Features Cisco Inter Switch Link ISL trunking on fast Ethernet ports VLAN S 4 can be configured Simple Network Management Protocol SNMP Optional web based configuration IEEE 802.1D Spanning Tree Protocol support. Support for 1024 MAC Addresses. Up to 320 Mbit s maximum forwarding bandwidth. Up to 450,000 packets per second aggregate packet forwarding rate. Hardware Processor Intel 80486 RAM 2 MB Flash memory FLASH 1 MB Backplane 1 Gbit s MAC Address table size 1024 10BaseT ports 12 or 24 Full Duplex 100BaseTX ports 1 ... more details
nofootnotes date August 2009 File Sparcclassic 01.jpg thumb A SPARCclassic workstation. SPARCstation Classic is a workstation formerly manufactured by Sun Microsystems . It is based on the sun4m architecture, and is enclosed in a lunchbox chassis. Specifications CPU support The SPARCstation Classic incorporates a single 50 MHz microSPARC processor. Memory The SPARCstation Classic has three banks with two DSIMM slots each. The official maximum configuration uses 16MB modules, but the first bank can also hold 32MB modules giving a maximum of 128Mb memory. Disk drives The SPARCstation Classic can hold one internal 3.5 inch 50 pin, single ended, fast narrow SCSI drive and a floppy. It also supports external SCSI devices. There is no Integrated Drive Electronics IDE ATAPI support. Network support The SPARCstation Classic comes with an on board AMD Lance Ethernet chipset providing 10BaseT networking as standard and 10Base2 and 10Base5 via an Attachment Unit Interface AUI transceiver. The OpenBoot ROM is able to boot from network, using RARP and TFTP. Like all other SPARCstation systems, the SSC holds system information such as MAC address and serial number in NVRAM. If the battery on this chip dies, then the system will not be able to boot. Operating systems The following operating systems run on a SPARCstation Classic SunOS 4.1.3c onwards Solaris Operating Environment Solaris 2.3 Edition II to Solaris 9 Linux Some but not all distributions still support this sparc32 sub architecture NetBSD sparc32 OpenBSD sparc32 Differences between Classic and LX The SPARCstation Classic was designed to be an entry level workstation with a lower price point than the SPARCstation LX it has a lower end CG3 framebuffer rather than the LX s accelerated CG6. The SPARCclassic also features 8 bit audio as opposed to 16 bit audio for the LX. The motherboards of the two systems are otherwise similar, and both use the same chassis. See also SPARCstation SPARCstation 4 SPARCstation 5 External link ... more details
No footnotes date August 2009 Mergeto Sun 4 architecture workstations date September 2009 Merge SPARCstation IPX date September 2009 SPARCstation LX is a workstation sold by Sun Microsystems . It is based on the sun4m architecture, and is enclosed in a lunchbox chassis. Specifications CPU support The SPARCstation LX incorporates a single 50 MHz microSPARC processor. Memory The SPARCstation LX has three banks with two DSIMM slots each. The official maximum configuration uses 16MB modules, but the first bank can also hold 32MB modules giving a maximum of 128Mb memory. Disk drives The SPARCstation LX can hold one internal 50 pin, single ended, fast narrow SCSI drive and a floppy. It also supports external SCSI devices. There is no IDE ATAPI support. Network support The SPARCstation LX comes with an on board AMD Lance ethernet chipset providing 10BaseT networking as standard and 10Base2 and 10Base5 via an Attachment Unit Interface AUI transceiver. The OpenBoot ROM is able to boot from network, using RARP and TFTP. Like all other SPARCstation systems, the SSC holds system information such as MAC address and serial number in NVRAM. If the battery on this chip dies, then the system will not be able to boot. Operating systems The following operating systems will run on a SPARCstation LX SunOS 4.1.3c onwards Solaris Operating Environment Solaris 2.3 Edition II to Solaris 9 Linux Some but not all distribution still support this sparc32 sub architecture NetBSD sparc OpenBSD sparc Differences between Classic and LX The SPARCstation LX has an accelerated CG6 framebuffer compared to the SPARCstation Classic s CG3. The LX also features 16 bit audio as opposed to 8 bit audio for the SPARCclassic. The motherboards of the two systems are otherwise similar, and both use the same chassis. See also SPARCstation SPARCstation 4 SPARCstation 5 External links http obsolyte.com sun lx Obsolyte SPARCstation Classic and LX http www.sunstuff.org hardware systems sun4 sun4m SPARCstationClassic P ... more details
No footnotes date August 2009 Mergeto Sun 4 workstation architecture date September 2009 Merge SPARCstation LX date September 2009 SPARCstation IPX is a workstation sold by Sun Microsystems . It is based on the sun4c architecture, and is enclosed in a lunchbox chassis. Specifications CPU support The SPARCstation IPX incorporates a Fujitsu MB86903 or Weitek W8701 40 MHz processor. Weitek provided 80 MHz after market SPARC POWERuP 2000A 080 GCD processors which work well in an IPX and require a rom update to v2.9. The SPARCstation IPX is limited to use as a single processor machine. Memory The SPARCstation IPX has four 72 pin SIMM slots for memory expansion. The memory uses parity Fast Page Memory FPM SIMM s with speeds of 50 80ns. Slots can be filled individually giving a maximum of 64Mb memory. Paired memory modules decrease access times via bank interleaving resulting in faster memory and overall system performance. Additional 32 and 64mb SBUS Above Board RAM expanders will fit and work the IPX using the 8 pin J101 header which contains additional power and clock signals next to the DMA Cache controller. Disk drives The SPARCstation IPX can hold one internal 50 pin IDC SCSI drive and a floppy. It also supports external SCSI devices. There is no IDE ATAPI support. Modern 80 pin drives can work with an adapter, but do not fit inside the case due to the size of the adapter. Network support The SPARCstation IPX comes with an on board AMD Lance Ethernet chipset providing 10BaseT networking as standard and 10Base2 and 10Base5 via an Attachment Unit Interface AUI transceiver. The OpenBoot ROM is able to boot from network, using RARP and TFTP. Like all other SPARCstation systems, the IPX holds system information such as MAC address and serial number in NVRAM. If the battery on this chip dies, then the system will not be able to boot. Operating systems The following operating systems will run on a SPARCstation IPX SunOS 4.1.1 onwards Solaris Operating Environment Solaris 2. ... more details
Mac specs Image Macintosh IIsi 2.jpg Introduced October 15, 1990 MSRP 2999 CPU Motorola 68030 CPUspeed 20 MHz OS System 6.0.7 to 7.6.1 RAM 1 Megabyte MB , expandable to 65 MB RAMtype 100 ns 30 pin SIMM s Discontinued March 15, 1993 Image Macintosh IIsi Ports.jpg thumb 250px Macintosh IIsi rear showing ports, including 10base2, 10baseT and optional AUI Ethernet card. The Macintosh IIsi was a compact three box desktop unit, effectively a cut down Macintosh IIci in a smaller case used for no other Macintosh model , made cheaper by the redesign of the motherboard and the deletion of all but one of the expansion card slots a single Processor Direct Slot . It was introduced as a low cost alternative to the professional desktop models for home use, but offered more features and performance than the Macintosh LC LC series. It had color and could drive a number of different external monitors, with a maximum screen resolution of 640 480 in eight bit color. It shipped with either a 40 MB or 80 MB internal hard disk, and a 1.44 MB floppy disk drive. The Motorola 68882 MC 68882 floating point unit FPU was an optional extra, mounted on a special plug in card. Ports included SCSI , two serial ports, an Apple Desktop Bus ADB port, a floppy drive port, and 3.5mm stereo headphone sound output and microphone sound input sockets. The IIsi was the first Macintosh released with built in sound in capabilities. The Macintosh LC , which was announced at the same time and also had a sound in port, was released a number of months after the IIsi. A bridge card was available for the IIsi to convert the Processor Direct slot to a standard internal NuBus card slot, compatible with the other II series Macintoshes. The bridge card included a math co processor to improve floating point performance. The NuBus card was mounted horizontally above the motherboard. To cut costs, the IIsi s video shared the main system memory, which also had the effect of slowing down video considerably, especially as the ... more details
Unreferenced date July 2009 Forwarding is the relaying of Packet information technology packet s from one network segment to another by node networking nodes in a computer network . Image unicast forwarding.png frame A unicast forwarding pattern, typical of many networking technologies including the overwhelming majority of Internet traffic Image multicast forwarding.png frame A multicast forwarding pattern, typical of Protocol Independent Multicast PIM Image broadcast forwarding.png frame A broadcasting networks broadcast forwarding pattern, typical of bridging networking bridged Ethernet The simplest forwarding model unicast ing involves a packet being relayed from link to link along a chain leading from the packet s source to its destination. However, other forwarding strategies are commonly used. Broadcasting networks Broadcasting requires a packet to be duplicated and copies sent on multiple links with the goal of delivering a copy to every device on the network. In practice, broadcast packets are not forwarded everywhere on a network, but only to devices within a broadcast domain , making broadcast a relative term. Less common than broadcasting, but perhaps of greater utility and theoretical significance, is multicast ing, where a packet is selectively duplicated and copies delivered to each of a set of recipients. Networking technologies tend to naturally support certain forwarding models. For example, fiber optics and copper cables run directly from one machine to another form natural unicast media data transmitted at one end is received by only one machine at the other end. However, as illustrated in the diagrams, nodes can forward packets to create multicast or broadcast distributions from naturally unicast media. Likewise, traditional Ethernet 10BASE5 and 10BASE2 , but not the more modern 10BASE T are natural broadcast media all the nodes are attached to a single long cable and a packet transmitted by one device is seen by every other device attached to t ... more details
nofootnotes date August 2009 Image Sparcstation5.jpg thumb 250px Sun Microsystems SPARCstation 5 SPARCstation 5 or SS5 code named Aurora is a workstation sold by Sun Microsystems . It is based on the sun4m architecture, and is enclosed in a pizza box chassis. A simplified, cheaper version of the SS5 was later released as the SPARCstation 4 . Sun also marketed these same machines under the Netra brand, without framebuffers or keyboards and preconfigured with all the requisite software to be used as web server s. Specifications CPU support The SPARCstation 5 may incorporate one of the following processors 70, 85, or 110 MHz Sun Microsystems microSPARC II, or a 170 MHz Fujitsu Microelectronics, Inc. FMI TurboSPARC . Fujitsu also provided a 160 MHz TurboSPARC CPU Upgrade Kit for upgrading 70, 85 and 110 MHz microSPARC II models. The SPARCstation 5 has no MBus and thus is limited to use as a single processor machine. Memory The SPARCstation 5 has eight DSIMM slots for memory expansion. Slots can be filled individually with either 8Mb or 32Mb modules giving a maximum of 256Mb memory. The memory used is identical to that of the SPARCstation 4 . Disk drives The SPARCstation 5 can hold two internal 80 pin Single Connector Attachment SCA , single ended, fast narrow SCSI drives, a SCSI CD ROM drive and a floppy. It also supports external SCSI devices. There is no IDE ATAPI support. Network support The SPARCstation 5 comes with an on board AMD Lance ethernet chipset providing 10BaseT networking as standard and 10Base2 and 10Base5 via an Attachment Unit Interface AUI transceiver. A 10 100Mbit s hme Happy Meal NIC can be added for faster connections. The OpenBoot ROM is able to boot from network, using RARP and TFTP. Like all other SPARCstation systems, the SS5 holds system information such as MAC address and serial number in NVRAM. If the battery on this chip dies, then the system will not be able to boot. AFX The SPARCstation 5 had three SBus expansion slots ... more details
for the Ethernet coax cable 10BASE2 Recently revised date March 2009 Advert date April 2008 Infobox Software name ThinWire logo Image ThinWireLogo.png screenshot caption author developer released June 22, 2006 latest release version latest release date latest preview version latest preview date programming language Java programming language Java operating system Cross platform Java Virtual Machine JVM platform language status genre Ajax framework license LGPL website URL http www.sourceforge.net projects thinwire ThinWire is an open source , Java Sun Java based web application framework that uses Ajax programming Ajax techniques to give Web application Web Applications the look and feel of traditional Graphical user interface GUI applications. The project encourages all users to contribute and enhance the product. ThinWire attempts to differentiate itself from the plethora of Ajax framework s by bringing the event driven programming model of desktop applications to web programming. The source code of a ThinWire based application will more closely resemble that of a traditional desktop GUI application than it will a web application. ThinWire handles all the web rendering and browser server communication automatically. Features Familiar Event driven programming event driven Graphical user interface GUI programming model Reconnects the flow of logic, no request response Maintains State computer science state naturally via Variable programming variables , not via Session computer science session Develop exclusively in a server side language ThinWire downloads once, just over 100K Completely Dynamic, single page for entire application Content is sent incrementally and only when needed The ThinWire Concept The first thing ThinWire does is accept that HTML & HTTP were designed to deliver static content pages in the form that we see on news and magazine web sites. They are not intended to be used as is for business process, data centric application development. HTML forms provide ... more details
Image ThicknetTransceiver.jpg thumb 10BASE5 vampire tap Medium Attachment Unit Transceiver Image 10Base5transcievers.jpg thumb 10BASE5 transceivers, cables, and tapping tool Image Xerox PARC ethernet cable.jpg thumb 10BASE5 cable with N connectors and transceivers 10BASE5 also known as thick ethernet or thicknet was the original commercially available variant of Ethernet . For its Ethernet physical layer physical layer it used cable similar to RG 8 U coaxial cable but with extra braided shielding. This is a stiff, convert 0.375 in sing on diameter cable with an impedance of 50 Ohm unit ohm s , a solid center conductor, a foam insulating filler, a shielding braid, and an outer jacket. The outer sheath was often yellow to orange brown foam fluorinated ethylene propylene for fire resistance so it often is called yellow cable , orange hose , or sometimes humorously frozen yellow garden hose . ref All in One Network Certification Exam Guide , Mike Meyers, 3rd Ed., McGraw Hill, 2004, p. 79. ref 10BASE5 has been superseded due to the immense demand for high speed networking, and the low cost of Category 5 cable Category 5 cable. Both 10BASE2 and 10BASE5 became obsolete after the introduction of Ethernet over twisted pair . Name origination The name 10BASE5 is derived from several characteristics of the physical medium. The 10 refers to its transmission speed of 10 megabit per second Mbit s . The BASE is short for baseband signalling as opposed to broadband , and the 5 stands for the maximum segment length of convert 500 m . citation needed date July 2011 Network design 10BASE5 coax cables had a maximum length of 500 meters 1,640 ft . The maximum number of nodes that can be connected to a 10BASE5 segment is 100. ref cite web url http computernetworkingnotes.com n plus certifications 10base ethernet.htm title 5 4 3 rule accessdate 2010 06 30 ref Transceivers may be installed only at precise 2.5 metre intervals. This distance was chosen to not correspond to the wavelen ... more details
File Transceiver Workshop Cologne 06 .jpeg thumb right Two Medium Attachment Units or transceivers. The units shown are backwards compatibility oriented 10BASET MAUs, not the more typical 10BASE5 MAUs cf. article. A Medium Attachment Unit MAU is a transceiver which converts signals on an Ethernet cable to and from Attachment Unit Interface AUI signals. On original 10BASE5 Thick Ethernet, the MAU was typically clamped to the Ethernet cable. With later standards it was generally integrated into the network interface controller and eventually the entire Ethernet controller was often integrated into a single integrated circuit chip to reduce cost. In most modern switched or hubbed Ethernet over twisted pair systems, neither the MAU nor the AUI interfaces exist apart, perhaps as notional entities for the purposes of thinking about layering the interface , and the Category 5 cable category 5 CAT5 cable connects directly into an Ethernet socket on the host or router. For backwards compatibility with equipment which still has external AUI interfaces, MAUs are still available with 10BASE2 or 10BASET connections. However, the tradition of using a separate low level I O device in networking has continued in fast optical fiber network interfaces, where the GBIC , XENPAK , XFP , and enhanced small form factor pluggable transceiver enhanced small form factor pluggable SFP pluggable transceiver modules using the XAUI interface play a similar role. Objectives of MAU Provide the physical means for communication between local network data link entities. It defines a physical interface that can be implemented independently among different manufacturers of hardware and achieve the intended level of compatibility when interconnected in a common local network. Provide a communication channel capable of high bandwidth and low bit error ratio performance. Provide for ease of installation and service. Provide for high network availability ability of a station to gain access to the medium an ... more details
about the standards working group Ethernet frame data format Ethernet frame IEEE 802.3 is a working group and a collection of IEEE standards produced by the working group defining the physical layer and data link layer s media access control MAC of wired Ethernet . This is generally a local area network technology with some wide area network applications. Physical connections are made between nodes and or infrastructure devices Network hub hub s, Network switch switches , router computing router s by various types of copper or Optical fiber fiber cable . 802.3 is a technology that supports the IEEE 802.1 network architecture. Communication Standards class wikitable Ethernet Standard Date Description Experimental br Ethernet 1973 ref cite web url http americanhistory.si.edu collections object.cfm?key 35&objkey 96 title Ethernet Prototype Circuit Board publisher Smithsonian National Museum of American History accessdate 2007 09 02 ref 2.94 Mbit s 367 kilobyte kB s over coaxial cable coax bus network bus Ethernet II br DIX v2.0 1982 10 Mbit s 1.25 megabyte MB s over thick coax. Frames have a Type field. This frame format is used on all forms of Ethernet by protocols in the Internet protocol suite . IEEE 802.3 1983 10BASE5 10 Mbit s 1.25 MB s over thick coax. Same as Ethernet II above except Type field is replaced by Length, and an IEEE 802.2 802.2 LLC header follows the 802.3 header 802.3a 1985 10BASE2 10 Mbit s 1.25 MB s over thin Coax a.k.a. thinnet or cheapernet 802.3b 1985 10BROAD36 802.3c 1985 10 Mbit s 1.25 MB s repeater specs 802.3d 1987 Fiber optic inter repeater link 802.3e 1987 1BASE5 or StarLAN 802.3i 1990 10BASE T 10 Mbit s 1.25 MB s over twisted pair 802.3j 1993 10BASE F 10 Mbit s 1.25 MB s over Fiber Optic 802.3u 1995 100BASE TX , 100BASE T4 , 100BASE FX Fast Ethernet at 100 Mbit s 12.5 MB s w autonegotiation 802.3x 1997 Full Duplex and Ethernet flow control flow control also incorporates DIX framing, so there s no longer a DIX 802.3 split 802.3y 1998 100 ... more details
refimprove date March 2011 Infobox Computer Hardware Generic name Network interface controller image Network card.jpg caption A 1990s Ethernet network interface controller card which connects to the motherboard via the now obsolete ISA bus . This combination card features both a BNC connector left for use in now obsolete 10BASE2 networks and an 8P8C connector right for use in 10BASE T networks. invent date invent name conn1 Motherboard via1 1 Integrated via1 2 Peripheral Component Interconnect PCI Connector via1 3 Industry Standard Architecture ISA Connector via1 4 PCI E via1 5 FireWire via1 6 USB conn2 Network via2 1 Fast Ethernet via2 2 Gigabit Ethernet via2 3 Optical fiber via2 4 Token ring class name Speeds class1 10 Mbit s class2 100 Mbit s class3 1000 Mbit s class4 up to 160 Gbit s manuf1 Novell manuf2 Intel manuf3 Realtek manuf4 3Com A network interface controller also known as a network interface card , network adapter , LAN adapter and by similar terms is a computer hardware component that connects a computer to a computer network . Whereas network interface controllers were commonly implemented on expansion card s that plug into a computer bus , the low cost and ubiquity of the Ethernet standard means that most newer computers have a network interface built into the motherboard . Purpose The network controller implements the electronic circuitry required to communicate using a specific physical layer and data link layer standard such as Ethernet , Wi Fi , or Token Ring . This provides a base for a full network protocol stack , allowing communication among small groups of computers on the same LAN and large scale network communications through routable protocols, such as Internet Protocol IP . File EISA TokenRing NIC.JPG thumb left 250px Madge Networks Madge nowrap 4 16 Mbit s TokenRing Industry Standard Architecture ISA 16 NIC Although other network technologies exist e.g. token ring , Ethernet has achieved near ubiquity since the mid 1990s. Every Ethernet ... more details
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