[en] The methodology of reliability analysis for DCN-Q in KNGR was studied through in this paper. The system model for the DCN-Q data communication network is based on the currently proposed architecture for KNGR. Any significant changes to this proposed architecture that may occur in the future, can impact the DCN-Q reliability model as contained herein, and the resultant reliability calculations. The data used for the availability computations are based on a conservative estimate of the hardware MTBF rates as defined in this paper. Since selection of the actual hardware for implementing the DCN-Q data communication network has not yet been determined at the time of this report, conservative MTBF data was utilized to perform the system availability calculations