Before revision: A typical switch may have a 2×2 and 4×4 down sorter, followed by an 8×8 up sorter, followed by a 2×2 crosspoint Banyan switch network, resulting in a 3 level sorting for a 3 stage banyan network switch.
After revision: A typical switch may have a 2×2 and 4×4 down sorter, followed by an 8×8 up sorter, followed by a 2×2 crosspoint Banyan switch network, resulting in a 3 level sorting for a 3-stage banyan network switch.