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In a simple data communication system, terminals and other remote I/O devices are linked with one or more central processors to receive input data and capture output information. Connecting equipment and software, sometimes referred to as interface elements, are used to bridge the different physical and operating environments that exist between I/O devices and central processors.
Some possible DDP configurations are:
Star DDP Network: A central host computer(s) communicates and controls a second level of satellite or node processors. These nodes in turn communicate with I/O terminals.
Hierarchical Variation of Star DDP Network: Here the central host Link Removed computer (s) is still linked to regional node processors but these regional nodes may, in turn, act as hosts to subordinate small processors.
In addition to proceeding local applications, the small third level processors may support local-level intelligent terminals. NICNET has adopted this configuration with some variation.
Ring DDP Network: It is a no-host ring arrangement of communication equals. Each ring processor may have communicating subordinates, but within the ring, there is no master computer.
Some possible DDP configurations are:
Star DDP Network: A central host computer(s) communicates and controls a second level of satellite or node processors. These nodes in turn communicate with I/O terminals.
Hierarchical Variation of Star DDP Network: Here the central host Link Removed computer (s) is still linked to regional node processors but these regional nodes may, in turn, act as hosts to subordinate small processors.
In addition to proceeding local applications, the small third level processors may support local-level intelligent terminals. NICNET has adopted this configuration with some variation.
Ring DDP Network: It is a no-host ring arrangement of communication equals. Each ring processor may have communicating subordinates, but within the ring, there is no master computer.
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In a data communication system, terminals and remote I/O devices are connected to central processors to exchange input data and output information. To bridge the physical and operational variations between these devices, interface elements are used. Different configurations can be employed in such setups: 1. Star DDP Network: - In a Star DDP Network configuration, a central host computer or computers manage a network of satellite or node processors. - These node processors then interact with I/O terminals. - This setup allows for centralized control from the host computer to the peripheral devices. 2. Hierarchical Variation of Star DDP Network: - This variation maintains the concept of a central host computer linked to regional node processors. - Regional nodes, however, may themselves function as hosts to smaller subordinate processors. - The subordinate processors at the third level can support local applications and intelligent terminals at a local level. - NICNET has utilized this configuration with some modifications to facilitate local functions efficiently. 3. Ring DDP Network: - The Ring DDP Network adopts a no-host ring communication model, with all processors in the ring sharing communication equally. - While ring processors can communicate with their subordinates, there is no master computer within the ring. - This setup fosters a distributed and interconnected network without a central controlling entity.