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Topic: SDLC

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	SNA Protocols - DLSw \| HPR-APPN \| NHDR \| NLP \| QLLC \| SDLC \| SNA \| SNA Terminology \| SNA TH0 & TH1 \| SNA TH5 \| THDR
		The SDLC (Synchronous Data Link Control) protocol was developed by IBM to be used as the layer 2 of the SNA hierarchical network.
		SDLC is used on multipoint lines and it can support as many as 256 terminal control units or secondary stations per line.
		SDLC supports an extended window size (modulo 128) where the number of possible outstanding frames for acknowledgement is raised from 8 to 128.
	www.protocols.com /pbook/sna.htm (3127 words)

	CAST SDLC Global Serial Channel Controller Core
		The SDLC controller is a synthesizable HDL core of a high-speed synchronous serial communication interface.
		This unit controls the transmit operation of the SDLC and is subdivided into several components responsible for generating properly formatted SDLC/HDLC frames.
		The SDLC core’s functionality was verified by means of a proprietary hardware modeler.
	www.cast-inc.com /cores/sdlc/index.shtml (798 words)

	Dissertation - Appendices - SDLC #1
		The first step of the SDLC process calls for a definition of the problem, an articulation of the opportunities, and a description of the objectives on which the system is based.
		In summary, in the first step of the SDLC process, the two types of problems that are to be addressed in the model system design are the health-related outcomes problems and the technology and design process problems.
		Goals for the system were generated from two sources, the opportunities that are possible because of the development and implementation of the system that is envisioned and the mission statement that is related to the design of the model system.
	www.american.edu /academic.depts/cas/health/nchf/archives/pubsdisssdlc1.html (2181 words)

	JBM SDLC Protocol Tutorial
		SDLC was invented by IBM to replace the older Bisynchronous protocol for wide area connections between IBM equipment.
		The result is that in a SDLC NRZI data stream one is guaranteed a transition every 5 bit times at a minimum, and it is on each transition that the clock readjusts its synchronization.
		Error recovery in SDLC works such that one line error can cause many frames to be retransmitted, thus a noisy line manifests itself as low throughput and long response times.
	www.jbmelectronics.com /product/sdlc.htm (841 words)

	Osborn (1995). SDLC vs. JAD vs. RAD. Babson CIMS WP 95-07
		SDLC emphasizes formal requirements definition documents that build a detailed description of the system on paper before any code is produced.
		SDLC tends to rely on formal approvals that signify the handoff of project materials from one specialized organizational function to another.
		SDLC provides the care and precision needed to computerize large volumes of well-understood transactions, but does not necessarily provide the flexibility to match system development speed to process redesign efforts.
	faculty.babson.edu /osborn/cims/rad.htm (4682 words)

	SDLC Overview
		SDLC Protocol is used to ensure error-free performance over these links, which may be either point-to-point (switched or non-switched) or multipoint configurations.
		The SDLC protocol is an UNBALANCED procedure that provides for the orderly control of multipoint communications activity in complex networks.
		SDLC is an unbalanced procedure that defines the operation and interaction between a primary station (HOST) and one or more secondary stations (TERMINALS).
	www.techfest.com /networking/wan/sdlc.htm (1928 words)

	Using Enterprise OS Software
		The SDLC parameters for a port are inaccessible.
		SDLC polling and response occur locally between the SDLC device and the NETBuilder II bridge/router; the SNA data stream is tunneled through the network using the DLSw protocol.
		In an SDLC environment, datalink connections are initiated by the bridge/router acting as the primary station.
	support.3com.com /infodeli/tools/bridrout/u_guides/html/eos1111/family/using/sdlc.htm (3456 words)

	Synchronous Data Link Control (SDLC)and Derivatives
		The SDLC protocol was developed by IBM in the mid-1970s for use in SNA environments.
		SDLC was the first link-layer protocol based on synchronous, bit-oriented operation, and it remains the primary SNA link layer protocol for WAN links.
		SDLC primaries and secondaries can be connected in four basic configurations: point-to-point, multipoint, loop, and hub go-ahead.
	www.cisco.com /univercd/cc/td/doc/cisintwk/ito_doc/sdlcetc.htm (1677 words)

	SDLC Protocol - Martin Baker
		SDLC is a protocol developed by IBM, unlike Bi-Sync it separates the link control functions from the character set and data content.
		SDLC links this is the most common method of connecting remote nodes together.
		There is a option in SDLC called Non Return to Zero Inverted (NRZI), this is designed to ensure that there are plenty of bit transitions in the data to help with bit synchronisation, this is not required by modern modems.
	www.euclideanspace.com /coms/protocol/sdlc (4833 words)

	SDLC - a Whatis.com definition
		SDLC is equivalent to layer 2 of the Open Systems Interconnection (OSI) model of network communication.
		While SDLC (and normal response mode) are efficient protocols for closed private networks with dedicated lines, other modes of HDLC serve X.25 and frame relay protocols that manage packets on shared-line switched networks like those used by the Internet.
		SDLC is still a commonly encountered and prevalent data link protocol in today's mainframe environment.
	searchnetworking.techtarget.com /gDefinition/0,294236,sid7_gci214192,00.html (310 words)

	SDLC and SDLLC States [IBM Networking] - Cisco Systems
		This router has detected an error and is waiting for a response from the secondary, acknowledging this detection.
		SDLC PRI WAIT—Waiting for primary SDLC to come up.
		SDLC SEC WAIT—Waiting for secondary SDLC to come up.
	www.cisco.com /en/US/tech/tk331/tk336/technologies_tech_note09186a0080094744.shtml (286 words)

	Dissertation - Appendices - SDLC #3
		The goal of step 3 in the SDLC process was to arrive at a recommended set of specifications for the technical and functional needs of the proposed system.
		SDLC step #2 and their value for two stakeholder groups.
		The goal of this step was to define the technical and functional requirements for the proposed system and conduct a comparative analysis of the merits of the proposed system relative to the other options that were evaluated.
	www.american.edu /cas/health/nchf/archives/pubsdisssdlc3.html (3347 words)

	Link Stations, SDLC, IEEE 802.2
		SDLC is based on the "Normal Response Mode" (NRM) subset of HDLC.
		SDLC reflected the technology of 1975, before the invention of the microprocessor.
		When an I-frame is acknowledged on the LAN or SDLC line, this does not mean that the data in it is correct or has been processed.
	www.yale.edu /pclt/COMM/SDLC.HTM (1563 words)

	Services (Site not responding. Last check: 2007-10-08)
		SDLC maintenance is an ongoing program designed to provide continuing education, collaboration, and SDLC competitiveness.
		SDLC workshops can also be used as “refreshers” – a very important resource for long-term projects where attrition and personnel turnaround can create instabilities.
		A report is generated detailing the feedback gathered with expert recommendations for how the SDLC can or should be improved and updated to reflect changes in technology and the business.
	www.blackdiamond.com /html/Services/sdlc_maintenance.html (553 words)

	What is SDLC
		SDLC was the first link-layer protocol based on synchronous, bit-oriented operation.
		Contains the SDLC address of the secondary station, which indicates whether the frame comes from the primary or secondary.
		Despite the fact that it omits several features used in SDLC, HDLC is generally considered to be a compatible superset of SDLC.
	www.pulsewan.com /data101/sdlc_basics.htm (1390 words)

	The SDLC
		The SDLC is a methodology that has been constructed to ensure that systems are designed and implemented in a methodical, logical and step-by-step approach.
		An important component of the SDLC is that at each phase, a conscious decision is made to continue development of the project, or to drop it.
		You might be inclined to skip portions of what the SDLC calls for, but remember that the value of the process is that it forces you to follow a standardized methodology for developing programs and systems.
	www.johnsmiley.com /mybooks/1902745035/appendixc.htm (1434 words)

	SDLC
		SDLC methodology is designed to plan for and develop safe, secure, and reliable system solutions that depend on computer systems and technology to provide services and develop products, administer daily activities, and perform short and long-term management functions.
		SDLC is the process of applying standardized and well-document practices the contribute to well-built systems.
		SDLC is built on proven processes throughout the industry.
	home.earthlink.net /~paulvana/sdlc1.htm (102 words)

	What is SDLC? - A Word Definition From the Webopedia Computer Dictionary
		SDLC is similar to HDLC, an ISO standard.
		SDLC is the process of developing information systems through investigation, analysis, design, implementation and maintenance.
		SDLC is a systems approach to problem solving and is made up of several phases, each comprised of multiple steps:
	www.webopedia.com /TERM/S/SDLC.html (487 words)

	Configuring STUN SDLC over Frame Relay [IP Tunneling] - Cisco Systems
		The relevant states in the show stun command output and state changes in the debug command output are highlighted in the Sample show and debug Output section of this document.
		Note: In the Sample show and debug Output section, the SDLC broadcast address FF is activated first, followed by the end user’s C1 address.
		When you are troubleshooting, remember that many STUN SDLC issues are caused either by incorrect Nonreturn to Zero (NRZ) or Nonreturn to Zero Inverted (NRZI) encoding, or by an SDLC address mismatch.
	www.cisco.com /en/US/tech/tk827/tk369/technologies_configuration_example09186a00800fad6d.shtml (602 words)

	SDLC: Synchronous Data Link Control by IBM
		The Synchronous Data Link Control (SDLC) protocol, an IBM data link layer protocol for use in the Systems Network Architecture (SNA) environment.
		SDLC identifies two types of network nodes: primary and secondary.
		Address- Contains the SDLC address of the secondary station, which indicates whether the frame comes from the primary or secondary.
	www.javvin.com /protocolSDLC.html (510 words)

	SDLC, HDLC and LLC, LAPB
		Although a subset of HDLC, SDLC was developed by IBM before HDLC, and was the first link layer protocol based on synchronous, bit-oriented operation.
		IBM defined SDLC for managing synchronous serially transmitted bits over a data link, and these links can be full/half-duplex, switched or unswitched, point-to-point, point to multipoint or even looped.
		In SDLC, a link station is a logical connection between adjacent nodes.
	www.rhyshaden.com /hdlc.htm (1719 words)

	SDLC Resources LLC (Site not responding. Last check: 2007-10-08)
		SDLC Resources development staff has been in the business for many years, creating and maintaining software for some of the largest companies in the US.
		SDLC is the process of developing information systems through investigation, analysis, design, implementation and maintenance.
		SDLC is also known as information systems development or application development.
	www.sdlcresources.com (892 words)

	Addendum to NETBuilder 8.2 Release Notes--SDLC
		SDLC conversion is available for DLSw configuration across TCP/IP networks, for PU Type 2 devices such as 3270 terminal/cluster controllers.
		Depending on the type of physical connection and the particular type of PU, disabling the port or path, disconnecting the SDLC cable from the PU, or power cycling the PU may be required to recover.
		There are no asynchronous console messages to indicate the SDLC protocol state for a port or station; you must display the appropriate SDLC parameters.
	support.3com.com /notes/relnotes/bridrout/8596_38a.htm (1036 words)

	SDLC
		They offer small groups of upper class students the opportunity to create a unique, self-directed living environment, centered on a common theme, issue, or interest through which the group is expected to share and enrich the campus community.
		The SDLCs are awarded in the spring semester through a very selective application procedure coordinated by a committee of students faculty and staff.
		They strive to promote community awareness and to establish their SDLC as a link between the community and the Milagro House.
	www.etown.edu /ResidenceLife/topic/SDLC.aspx (511 words)

	DOJ Systems Development Life Cycle Guidance Chapter 1
		Using this SDLC will ensure that systems developed by the Department meet IT mission objectives; are compliant with the current and planned Information Technology Architecture (ITA); and are easy to maintain and cost-effective to enhance.
		This SDLC methodology establishes procedures, practices, and guidelines governing the initiation, concept development, planning, requirements analysis, design, development, integration and test, implementation, and operations, maintenance and disposition of information systems (IS) within the DOJ.
		Similarly, the documents called for in the guidance and shown in Appendix C should be tailored based on the scope of the effort and the needs of the decision authorities.
	www.usdoj.gov /jmd/irm/lifecycle/ch1.htm (1402 words)

	IS Auditing Guideline: G23 System Development Life Cycle (SDLC) Review
		Where specific SDLC methodologies and tools are used, the IS auditors should possess adequate knowledge and experience regarding such methodologies and tools and the associated risks.
		Where the review is a pre-implementation review, the IS auditor should study the proposed SDLC model and the related aspects to assess their appropriateness as well as the potential risks and provide the necessary risk mitigation recommendations to the appropriate management.
		In the case of post-implementation reviews, the IS auditor should review the relevant SDLC stages after their completion to highlight issues faced and provide recommendations for downstream corrections (if possible) and to serve as a learning tool for the future.
	www.isaca.org /standard/guide30.htm (1991 words)

	www.myspace.com/sdlcnetlabel
		SDLC est un collectif de jeunes artistes amateurs oeuvrant pour la gratuité de la musique et de la culture.
		At the hour, where, the technology and the advance of progress allow new means of communication to be born, the heavy industries of the disc, the commercial artists and the government want to restrict freedoms and to prohibit the remote loading of music via Internet, collective SDLC is born.
		SDLC is a collective of young artists amateurs working for the exemption from payment of the music and the culture.
	www.myspace.com /sdlcnetlabel (837 words)

	IMB - SDLC Overview
		All contractors engaged to perform all or some of the SDLC Phases are instructed to follow and conform to the SDLC outlined in this document.
		This Phase of the SDLC is required to determine the feasibility of a particular project proceeding, or not.
		This Phase of the SDLC is to prepare for and carry out the implementation of the developed system through user and acceptance testing to a full production system.
	srmwww.gov.bc.ca /imb/3star/sdlc/0overview/overview.htm (2872 words)

	ITG - SDLC/PM - ITG Project Management Office (PMO)
		The SDLC process is an eleven phase project life cycle providing a consistent, effective and repeatable practice that serves as the framework for delivering high quality, on time and on budget IT enabled business solutions.
		SDLC was designed, developed and is continuously improved based on OHSU business requirements, corporate culture and project management maturity.
		Within each phase, detail steps and sub steps define work flow and identify cross functional roles and responsibilities for all IT project stakeholders from customers and executive sponsors to business partners and IT subject matter experts.
	www.ohsu.edu /ohsuedu/central/itg/sdlcpm/sdlc-process.cfm (409 words)

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