The mass/charge transfer characteristics in a simulated MOLB (mono-block-layer built)-type solid-oxide fuel cells have been studied numerically. The transport phenomena within a linear MOLB module, including flow channels, active porous electrodes, electrolyte, and interconnections, are simulated using the finite volume method. The gas flow in the porous electrodes is governed by the isotropic linear resistance model with constant porosity and permeability. The diffusions of reactant species in the porous electrodes are described by the Stefan-Maxwell relation. Effective diffusivities for porous layers follow the Bruggman model. Porous electrochemistry is depicted via surface reactions with a constant surface-to-volume ratio, tortuosity, and average pore size. Results of the cathode-supported cell and the anode-supported cell are obtained, discussed, and compared thereafter for the first time.