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Topic: High-Level Data Link Control


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In the News (Wed 23 Dec 09)

  
 High-Level Data Link Control Protocol White Papers, High-Level Data Link Control Protocol Webcasts, High-Level Data Link Control Protocol Case Studies and High-Level Data Link Control Protocol Product Information
High-Level Data Link Control Protocol White Papers, High-Level Data Link Control Protocol Webcasts, High-Level Data Link Control Protocol Case Studies and High-Level Data Link Control Protocol Product Information
click on the links above to find null on related topics.
Please direct any comments or questions to: webmaster@bcr.com.
whitepapers.bcr.com /rlist/term/High-Level-Data-Link-Control-Protocol.html   (103 words)

  
 What Is...HDLC (High-level Data Link Control) (a definition)
HDLC (High-level Data Link Control) is a group of protocols or rules for transmitting data between network points (sometimes called nodes).
Now an ISO standard, HDLC is based on IBM's Synchronous Data Link Control (SDLC) protocol, which is widely used by IBM's large customer base in mainframe computer environments.
Layer 3 is the higher level that has knowledge about the network, including access to router tables that indicate where to forward or send data.
www.cc.jyu.fi /~eerwall/hdlc.html   (414 words)

  
 Point to Point Data Link Control
HDLC: High level data link control (Data link used to be considered “high layer” in protocol stack!
one sender, one receiver, one link: easier than broadcast link:
www.cs.umd.edu /~shankar/417-F01/Slides/chapter5c-aus/tsld011.htm   (27 words)

  
 Synchronous Data Link Control Protocol ( SDLC) Definition
Standards > Data Link Protocols > High-Level Data Link Control Protocol >
Synchronous Data Link Control Protocol -- 1 Product
Synchronous serial connectivity is an appropriate choice when rigorous security and intensive data integrity protocols are required for high-speed serial communication.
www.bitpipe.com /tlist/Synchronous-Data-Link-Control-Protocol.html   (243 words)

  
 Class Four of CS 354 Data Link & Multiplexing
High Level Data Link Control [ HDLC ] is the basis for almost all modern networking systems.
Data Transparency is the ability of a binary data message to contain bit sequences that are equal to flag sequences, yet not be processed as flag sequences.
Flow Control is process of sending messages at a rate that does not overwhelm the receiver, yet optimizes the channel.
home.comcast.net /~johnblumberg/CS354FOR.HTM   (408 words)

  
 High Level Data Link Control (HDLC) Protocol
The HDLC protocol is a general purpose protocol which operates at the data link layer of the OSI reference model.
Each piece of data is encapsulated in an HDLC frame by adding a trailer and a header.
The frames are separated by HDLC flag sequences which are transmitted between each frame and whenever there is no data to be transmitted.
www.erg.abdn.ac.uk /users/gorry/course/dl-pages/hdlc.html   (156 words)

  
 High-level data link control packet assembler/disassembler - Patent 4951278
In one embodiment, separate high level data link control (HDLC) PADs are provided at each end of the PSN operationally associated with the host computer and the plurality of end user devices, respectively.
That data packet (as X.25 DCE) is received by the host HPAD, which waits until the next poll for the line/control unit designated as part of the information contained in the received packet and then transmits to the host an SDLC RD response frame for that line/control unit.
In a full duplex link, modems servicing the link support simultaneous transmission in both directions on the link, as a result either of having a four wire circuit or of the ability to support simultaneous transmission on different frequencies in different directions and to disable echo suppressors on a two wire circuit.
www.freepatentsonline.com /4951278.html   (6399 words)

  
 HDLC - High-level Data-Link Control
There is a control field at the start of each frame that allows error detection, and data link setup and data link termination.
It is a bit-oriented data link control procedure under which all data transfer takes place in frames.
A ITU-T specified, bit-oriented, data link control protocol on which most other bit-oriented protocols are based.
www.auditmypc.com /acronym/HDLC.asp   (457 words)

  
 HDLC - High Level Data Link Control
The two basic functions in the protocol are link management and data transfer (which includes error and flow control).
Layer 2 of the OSI model is the data link layer.
Data is transmitted in the data field, which can vary in length depending upon the protocol using the frame.
www2.rad.com /networks/1994/hdlc/hdlc.htm   (748 words)

  
 High Level Data Link Control (HDLC)
High-level Data Link Control (HDLC) is an enhanced derivative of SDLC from IBM.
Nearly all other routers on the market use PPP for link control.
HDLC is the default serial link protocol for Cisco routers.
www.inetdaemon.com /tutorials/wan/hdlc   (58 words)

  
 High-Tech Dictionary Definition
(SDLC).A data transfer protocol used in IBM's SNA networks.SDLC conforms to ISO’s High-level Data Link Control (HDLC) and ANSI’s Advanced Data Communication Control Procedures (ADCCP).
www.computeruser.com /resources/dictionary/definition.html?lookup=7768   (25 words)

  
 Synchronous data link control network
A communications discipline that conforms to subsets of the Advanced Data Communication Control Procedures (ADCCP) of the American National Standards Institute (ANSI) and high-level data link control (HDLC).
A form of communications line control that uses commands to control the transfer of data over a communications line.
SDLC supports traditional AS/400 communication protocols, such as APPC, but does not support TCP/IP.
www.redbooks.ibm.com /pubs/html/as400/v4r5/ic2924/info/RZAJTRZAJTSDLCCON.HTM   (107 words)

  
 X.25 Protocol
The link level uses data link control procedures which are compatible with the High Level Data Link (HDLC) standardized by ISO, and with the Advanced Data Communications Control Procedures (ADCCP) standardized by the U.S.American National Standards Institute (ANSI).
The link level (also called level 2, or frame level) ensures reliable transfer of data between the DTE and the DCE, by transmitting the data as a sequence of frames (a frame is an individual data unit which contains address, control, information field etc.).
The packet level (also called level 3 or network level) creates network data units called packets which contain control information and user data.
www2.rad.com /networks/1996/x25/x25.htm   (2341 words)

  
 HDLC - High-level Data-Link Control
High Level Data Link Control: An ITU-TSS link layer protocol standard for point-to-point and multi-point communications.
High-Level Data Link Control, a bit level link layer protocol developed by the ISO
It is a bit-oriented data link control procedure under which all data transfer takes place in frames.
www.auditmypc.com /acronym/HDLC.asp   (457 words)

  
 Link level - Wikipedia, the free encyclopedia
Link level: In the hierarchical structure of a primary or secondary station, the conceptual level of control or data processing logic that controls the data link.
Note: Link-level functions provide an interface between the station high-level logic and the data link.
Link-level functions include (a) transmit bit injection and receive bit extraction, (b) address and control field interpretation, (c) command response generation, transmission and interpretation, and (d) frame check sequence computation and interpretation.
en.wikipedia.org /wiki/Link_level   (99 words)

  
 Data-Link Switching (DLSw)
Transport utilization—If the link between two DLSw partners reaches a high level of utilization, the window size can be reduced to lower the level of link utilization and to prevent packet loss between the nodes.
Switch-to-Switch Protocol (SSP) is a protocol used between DLSw nodes (routers) to establish connections, locate resources, forward data, and handle flow control and error recovery.
This has the normal advantages of a reliable transport protocol, in which the data flow is monitored and retransmitted if any data is lost (sequence numbers and acks).
www.cisco.com /univercd/cc/td/doc/cisintwk/ito_doc/dlsw.htm   (3452 words)

  
 LLC (Logical Link Control) (Linktionary term)
It is a subclass of HDLC (High-level Data Link Control), which is used on wide area links.
The LLC is part of the data link layer in a protocol stack.
Note that LLC resides on the upper half of the data link layer.
www.linktionary.com /l/llc.html   (355 words)

  
 Definition: advanced data communication control procedures
Note: ADCCP closely resembles high-level data link control (HDLC) and synchronous data link control (SDLC).
Advanced Data Communication Control Procedures (ADCCP): A bit-oriented Data-Link-Layer protocol used to provide point-to-point and point-to-multipoint transmission of data frames that contain error-control information.
www.atis.org /tg2k/_advanced_data_communication_control_procedures.html   (76 words)

  
 Toggit Certification Home for MCSE CCNA A+ study guides and test prep
It is equivalent to the HDLC (High-level Data Link Control) asynchronous balanced mode, in which a station can start a transmission without receiving permission from a control station.
This link is often the most expensive and least efficient connection in the telephone company’s system and is often a barrier to high-speed services.
Link rot occurs when the page indicated by the link is moved or erased.
www.toggit.com /Library/pedia/techno.asp?Term=l&Techno=Letter   (76 words)

  
 HDLC - High Level Data Link Control
The two basic functions in the protocol are link management and data transfer (which includes error and flow control).
Layer 2 of the OSI model is the data link layer.
The length of the address field is commonly 0,8 or 16 bits, depending on the data link layer protocol.
www2.rad.com /networks/1994/hdlc/hdlc.htm   (748 words)

  
 HDLC - High Level Data Link Control
The two basic functions in the protocol are link management and data transfer (which includes error and flow control).
The length of the address field is commonly 0,8 or 16 bits, depending on the data link layer protocol.
SNRM and SABM frames, for example, are used both to set up logical link between the primary and the secondary station and to inform the secondary station of the mode of operation to be used.
www2.rad.com /networks/1994/hdlc/hdlc.htm   (748 words)

  
 High Level Data Link Control (HDLC) Protocol
The HDLC protocol is a general purpose protocol which operates at the data link layer of the OSI reference model.
Each piece of data is encapsulated in an HDLC frame by adding a trailer and a header.
The frames are separated by HDLC flag sequences which are transmitted between each frame and whenever there is no data to be transmitted.
www.erg.abdn.ac.uk /users/gorry/course/dl-pages/hdlc.html   (156 words)

  
 HDLC: High Level Data Link Control
The High Level Data Link Control (HDLC) protocol, an ISO data link layer protocol based on the IBM SDLC, is to ensure that data passed up to the next layer has been received exactly as transmitted (i.e error free, without loss and in the correct order).
Protocol Structure - HDLC: High Level Data Link Control
FCS - The Frame Check Sequence (FCS) enables a high level of physical error control by allowing the integrity of the transmitted frame data to be checked.
www.javvin.com /protocolHDLC.html   (464 words)

  
 High-Level Data Link Control (HDLC)
High-Level Data Link Control (HDLC) this protocol was developed for unbalanced link level operations for one main station which is refer master.
The primary station is responsible for the data link, retraining control of the link at any times, initiating the error recovery procedures, a and transmission flow to and from the primary.
This protocol is important for two basic reasons one is widely used for standardized data link and the other control operations it uses.
iris.nyit.edu /~qrahma01/HDLC.html   (1738 words)

  
 Troubleshooting DLSw: Ethernet and Qualified Logical Link Control  [IBM Networking] - Cisco Systems
Logical Link Control (LLC) is a subset of High-Level Data Link Control (HDLC).
This document explains how to implement Qualified Logical Link Control (QLLC) in Cisco routers and message flows, for a call connection in a topology where a front-end processor (FEP) is connected through Ethernet and where remote devices (either physical unit [PU] type 2.0 or PU type 2.1) are connected to the X.25 network.
A dumb PU 2.0 is coaxially attached to an IBM 3174 Establishment Controller.
www.cisco.com /en/US/tech/tk331/tk336/technologies_tech_note09186a00800a6935.shtml   (3473 words)

  
 Definition: high-level data link control
high-level data link control (HDLC): A Link-Level protocol used to facilitate reliable point-to-point transmission of a data packet.
www.atis.org /tg2k/_high-level_data_link_control.html   (72 words)

  
 High-level Data Link Control - Computing Reference - eLook.org
High-level Data Link Control - Computing Reference - eLook.org
IBM's SDLC (Synchronous Data Link Control), the forerunner of HDLC and ANSI's ADCCP (Advanced Data Communications Control Procedure).
(HDLC) A general-purpose data link control protocol defined by ISO for use on both point-to-point and multipoint (multidrop) data links.
www.elook.org /computing/high-level-data-link-control.htm   (89 words)

  
 LLC (Logical Link Control) (Linktionary term)
It is a subclass of HDLC (High-level Data Link Control), which is used on wide area links.
The data link layer controls access to the network medium and defines how upper-layer data in the form of packets or datagrams is inserted into frames for delivery on a particular network.
The MAC (Medium Access Control) sublayer is where individual shared LAN technologies such as Ethernet are defined.
www.linktionary.com /l/llc.html   (89 words)

  
 network performance stress testing traffic generation and network simulation - IP traffic generator - satellite comms link simulator
The Vocality Simulator 2 ® is a high performance simulator of synchronous satellite or leased line links, with complete control of delay, data rates, error conditions and test facilities.
The Simulator 2 works at the bitstream level, allowing realistic and worst-case testing of applications and transmissions over a wide range of simulated communications links.
Advanced features include:- emulation of Routing & Bridging, Diff Serv with traffic conditioning, ToS emulation, IP monitoring, packet counters and timers, Tcl scripting language, network capture & replay, packet modifiers, multiple LAN, WAN nd ATM network interfaces, network queues, and remote control.
www.test-performance.co.uk   (89 words)

  
 VESA’s Digital Packet Video Link Standard Defines High Level Video Stream Protocol for Enhanced Display Content
DPVL decouples the video transmission rate from the display device’s refresh rate, resolving the bandwidth problem and allowing high data content and cascaded monitors to be updated efficiently
 The DPVL standard defines video packet formats for meta data, which must be embedded in the video stream.
  The standard also includes video packet structures that enable functional extensions and add flexibility to the video interface, along with a capability management scheme for negotiating protocol parameters between a host and a monitor, and a monitor control program that defines a set of commands that enhance the video stream protocol.
www.vesa.org /DPVLpr.htm   (89 words)

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