  In this paper we explore the validity of the Rosenfeld and the Dzugutov
relation for the Lennard-Jones (LJ) system, its repulsive counterpart, the WCA
system and a network forming liquid, the NTW model. We find that for all the
systems both the relations are valid at high temperature regime with an
universal exponent close to 0.8. Similar to that observed for the simple
liquids, the LJ and the WCA systems show a breakdown of the scaling laws at the
low temperature regime. However for the NTW model, which is a simple liquid,
these scaling laws are valid even at lower temperature regime similar to that
found for ionic melts. Thus we find that the NTW model has mixed
characteristics of simple liquids and ionic melts. Our study further reveals a
quantitative relationship between the Rosenfeld and the Arrhenius relations.
For strong liquids, the validity of the Rosenfeld relation in the low
temperature regime is connected to it following the Arrhenius behaviour in that
regime. Finally we explore the role of pair entropy and residual multiparticle
entropy in the dynamics as a function of fragility of the systems.
