Excluding the fact that GloMoSim is free and QualNet is licensed, can anybody knows which is the best simulator among GoMoSlim and QualNet? Somebody told me that QualNet has more provisions than GoMoSlim. Is it true?
As far as I know GloMoSim was a basis for QualNet and is not under active development right now. Since QualNet is commercial I would expect it should be developed further and, hence, probably more reliable and up-to-date. I personally use NS-3 and it's nice - easy, extensive, under active development – has a support community and is in line with the latest specifications (and is open-sourced). But, of course, it highly depends on what you intend to simulate.
Yes QualNet communications simulation platform (QualNet) is a planning, testing and training tool that "mimics" the behavior of a real communications network. Simulation is a cost-effective method for developing, deploying and managing network-centric systems throughout their entire lifecycle. Users can evaluate the basic behavior of a network, and test combinations of network features that are likely to work. QualNet provides a comprehensive environment for designing protocols, creating and animating network scenarios, and analyzing their performance