Ivan Ryant

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Layered OSI architecture usually applies to computer networks. Nevertheless, it is system architecture. It shows any system from seven essential viewpoints. It raises the essential ideas and discovers the essential 15roblems. The figure shows what are the seven OSI layers. A system built of objects is a kind of network, Associations provide channels that(More)
Many systems analysts believe that strictly following a methodology prevents them from producing incorrect system specification. In fact, banking systems, telephone exchanges and other information and control systems may fail in any moment because of hidden errors. This article explains that the most widespread methodologies nowadays aid rising of dangerous(More)
D o squares form a subclass of rectangles? Baclawski and Indurkhya [1] explain that finding the answer is not easy. Inheritance is commonly viewed as a problem in which semantic relations mix with design concepts and the particular mechanisms of programming languages. But inheritance is more than a source of ambiguity and misunderstanding. We see another(More)
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