International Journal of Computer Science Issues

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In this paper permutation capabilities analysis of fault tolerant [1] Multistage Interconnection Networks have been presented. I have examined some popular FT(Four Tree)[8], MFT(Modified Four Tree)[2], PHI(Phi Network )[11], NFT(New Four Tree)[4], IFT(improved Four Tree)[5], IASN(Irregular Augmented Shuffle)[14] and IIASN(Improved Irregular Augmented Shuffle)[3] networks which are irregular in nature[11].Permutation capabilities are measured in terms of incremental and identical basis by introducing various faults at the different stages of the networks.