Communications architecture for distributed systems
The communications-served data-processing system. Today's teleprocessing systems. System trends. Evolution of configuration and function distribution. Improving line utilization. System objectives summary. The architectural layers. Basic concepts of systems network architecture. Higher-level services of sna network. Data flow control. Transmission control. Path control. Data link control. Overview of operations. Putting it together. Finite state architecture. Reliability and security control. Advanced functions. Multidomain networks. Routing techniques. Interfacing to new data networks.
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active application program application subsystem architecture ARPANET BIND command boundary function bracket bytes called carrier CCITT CDRM chain cluster controller communications controller Computer configuration connection control domains CPMGR cross-domain data flow control data link control defined destination device distributed EBCDIC end-user error example facilities FI.FMD field FM header format frame frame check sequence half-duplex half-session HDLC host indicator INITIATE interface logical unit LU services LU-LU session multiple network operator network services nonswitched normal flow NS header packet switching parameters path control physical unit polling presentation services primary LU primary station procedure protocols received recovery reset resource routing SDLC secondary station segment sent sequence number services control point session control shown in Fig SNA network specified SSCP subarea switched network synchronous Systems Network Architecture terminal nodes tion transmitted VTAM