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- Synchronous_Data_Link_Control abstract "Synchronous Data Link Control (SDLC) is a computer communications protocol. It is the layer 2 protocol for IBM's Systems Network Architecture (SNA). SDLC supports multipoint links as well as error correction. It also runs under the assumption that an SNA header is present after the SDLC header. SDLC was mainly used by IBM mainframe and midrange systems; however, implementations exist on many platforms from many vendors. The use of SDLC (and SNA) is becoming more and more rare, mostly replaced by IP-based protocols or being tunneled through IP (using AnyNet or other technologies).[citation needed]In 1975, IBM developed the first bit-oriented protocol, SDLC, from work done for IBM in the early 1970s. This de facto standard has been adopted by ISO as High-Level Data Link Control (HDLC) in 1979 and by ANSI as Advanced Data Communication Control Procedures (ADCCP). The latter standards added features such as the Asynchronous Balanced Mode, frame sizes that did not need to be multiples of bit-octets, but also removed some of the procedures and messages (such as the TEST message).SDLC operates independently on each communications link, and can operate on point-to-pointmultipointor loop facilities, on switched or dedicated, two-wire or four-wire circuits, and with full-duplex and half-duplex operation.A unique characteristic of SDLC is its ability to mix half-duplex secondary stations with full-duplex primary stations on four-wire circuits, thus reducing the cost of dedicated facilities.Intel used SDLC as a base protocol for BITBUS, still popular in Europe as fieldbus and included support in several controllers (i8044/i8344, i80152). The 8044 controller is still in production by third party vendors. Other vendors putting hardware support for SDLC (and the slightly different HDLC) into communication controller chips of the 1980s included Intel, Zilog, Motorola, and National Semiconductor. As a result, a wide variety of equipment in the 1980s used it and it was very common in the mainframe centric corporate networks which were the norm in the 1980s. The most common alternatives for SNA with SDLC were probably DECNET with DDCMP, BDLC, and ARPANET with IMPs.".
- Synchronous_Data_Link_Control wikiPageExternalLink Synchronous_Data_Link_Control_and_Derivatives.
- Synchronous_Data_Link_Control wikiPageExternalLink www.bitbus.org.
- Synchronous_Data_Link_Control wikiPageExternalLink ibmsj1501C.pdf.
- Synchronous_Data_Link_Control wikiPageID "476943".
- Synchronous_Data_Link_Control wikiPageRevisionID "564810393".
- Synchronous_Data_Link_Control hasPhotoCollection Synchronous_Data_Link_Control.
- Synchronous_Data_Link_Control subject Category:Link_protocols.
- Synchronous_Data_Link_Control type Abstraction100002137.
- Synchronous_Data_Link_Control type Communication100033020.
- Synchronous_Data_Link_Control type Direction106786629.
- Synchronous_Data_Link_Control type LinkProtocols.
- Synchronous_Data_Link_Control type Message106598915.
- Synchronous_Data_Link_Control type Protocol106665108.
- Synchronous_Data_Link_Control type Rule106652242.
- Synchronous_Data_Link_Control comment "Synchronous Data Link Control (SDLC) is a computer communications protocol. It is the layer 2 protocol for IBM's Systems Network Architecture (SNA). SDLC supports multipoint links as well as error correction. It also runs under the assumption that an SNA header is present after the SDLC header. SDLC was mainly used by IBM mainframe and midrange systems; however, implementations exist on many platforms from many vendors.".
- Synchronous_Data_Link_Control label "Synchronous Data Link Control".
- Synchronous_Data_Link_Control label "Synchronous Data Link Control".
- Synchronous_Data_Link_Control label "Synchronous Data Link Control".
- Synchronous_Data_Link_Control label "Synchronous Data Link Control".
- Synchronous_Data_Link_Control label "Synchronous Data Link Control".
- Synchronous_Data_Link_Control label "Synchronous Data Link Control".
- Synchronous_Data_Link_Control label "Synchronous Data Link Control".
- Synchronous_Data_Link_Control sameAs SDLC.
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- Synchronous_Data_Link_Control sameAs Synchronous_Data_Link_Control.
- Synchronous_Data_Link_Control sameAs Synchronous_Data_Link_Control.
- Synchronous_Data_Link_Control sameAs m.02f5w5.
- Synchronous_Data_Link_Control sameAs Q1517778.
- Synchronous_Data_Link_Control sameAs Q1517778.
- Synchronous_Data_Link_Control sameAs Synchronous_Data_Link_Control.
- Synchronous_Data_Link_Control wasDerivedFrom Synchronous_Data_Link_Control?oldid=564810393.
- Synchronous_Data_Link_Control isPrimaryTopicOf Synchronous_Data_Link_Control.