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We study the emulation of Output Queuing (OQ) using Combined Input-Output Queuing (CIOQ) switches in the setting where the emulated OQ switch and the CIOQ switch have buffer capacity B ≥ 1 packets at every output. We analyze the resource requirements of CIOQ policies in terms of the required fabric speedup and the additional buffer capacity needed at the CIOQ inputs. For the family of work-conserving...