  We discuss multi-hadron production in both inelastic neutrino-nucleon
interactions in the current fragmentation region and neutrino-nucleus
collisions in the target fragmentation region. Our analysis, carried out within
the framework of the quark-gluon string model, is mainly focused on the
difference between these two processes. We show that the $Q^2$ dependence of
hadron multiplicity in the current and target fragmentation regions is indeed
completely different. The study of inelastic $\nu-A$ scattering in the target
fragmentation region also provides new information on nuclear structure at
small $N-N$ distances. The results of the proposed approach are in satisfactory
agreement with the data recently obtained at CERN by the NOMAD Collaboration.
