 Such networks have 2 log2"N" − 1 stages, each containing "N"/2 2×2 crossbar switches, and use a total of "N" log2"N" − "N"/2 2×2 crossbar switches.For example, an 8×8 Beneš network (i.e.with "N" = 8) is shown below; it has 2 log28 − 1 = 5 stages, each containing "N"/2 = 4 2×2 crossbar switches, and it uses a total of "N" log2"N" − "N"/2 = 20 2×2 crossbar switches.