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A thicknet MAU. The vampire tap on this specimen is still attached to a piece of "frozen yellow garden hose" 10BASE5 network cable, which has been cut. A thinnet MAU, showing a single BNC and a DA15 connector. Two Medium Attachment Units (MAUs). The units shown are backwards compatibility-oriented 10BASET MAUs, not older 10BASE5 or 10BASE2 MAUs.
10BASE2 (also known as cheapernet, [1] thin Ethernet, thinnet, and thinwire) is a variant of Ethernet that uses thin coaxial cable terminated with BNC connectors to build a local area network. During the mid to late 1980s, this was the dominant 10 Mbit/s Ethernet standard.
The first Ethernet standard, known as 10BASE5 (ThickNet) in the family of IEEE 802.3, specified baseband operation over 50 ohm coaxial cable, which remained the principal medium into the 1980s, when 10BASE2 (ThinNet) coax replaced it in deployments in the 1980s; both being replaced in the 1990s when thinner, cheaper twisted pair cabling came to dominate the market.
10BASE5 (also known as thick Ethernet or thicknet) was the first commercially available variant of Ethernet. The technology was standardized in 1982 [ 1 ] as IEEE 802.3 . 10BASE5 uses a thick and stiff coaxial cable [ 2 ] up to 500 meters (1,600 ft) in length.
This shift led to the decline of 10BASE5 (thicknet) and 10BASE2 (thinnet) which made use of the interface. [6] [7] The electrical AUI connection remained internally within equipment for some time. With the introduction of Fast Ethernet, the AUI interface became obsolete and was replaced by the Media Independent Interface (MII). [8]
The physical-layer specifications of the Ethernet family of computer network standards are published by the Institute of Electrical and Electronics Engineers (IEEE), which defines the electrical or optical properties and the transfer speed of the physical connection between a device and the network or between network devices.
COMMAND.COM, the original Microsoft command line processor introduced on MS-DOS as well as Windows 9x, in 32-bit versions of NT-based Windows via NTVDM; cmd.exe, successor of COMMAND.COM introduced on OS/2 and Windows NT systems, although COMMAND.COM is still available in virtual DOS machines on IA-32 versions of those operating systems also.
The Read(10), Read(12), Read Long, Write(10), Write(12), and Write Long commands all contain a 32-bit LBA address plus various other parameter options. The capacity of a "sequential access" (i.e. tape-type) device is not specified because it depends, amongst other things, on the length of the tape, which is not identified in a machine-readable way.