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The problems that arise when setting tasks for determining the vector of a network attack in a corporate information network are considered. The varieties of various techniques that simplify the construction of a network  attack vector used  in the analysis of the reliability of information systems are presented and characterized. The suitability for various procedures for determining vector parameters is considered. When constructing a network attack vector, the specificity of the manifestation of the time parameter was determined as a characteristic indicating a more effective way of spreading compromise. The formation of the vector is considered taking into account the specifics of the networks multilevel organization. The specifics of the simplified vector calculation model including procedures focused on various approaches are determined.

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