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This scientific paper is devoted to the fault-tolerant local area networks with three functional layers: core, distribution and access. The reliability analysis of three-layer networks using the reliability model of the group of identical and independent restorable elements and offered by the author formulas for calculation of the stationary availability factor of three-layer local area networks with single and multiple distribution subgroups are discussed. Finally, an example of calculation of the stationary availability factor of the fault-tolerant three-layer local area network with two distribution subgroups is presented.

Analysis of the stationary availability factor of fault-tolerant three-layer local area networks