VANET is a form of Mobile Ad-Hoc Network or MANET and its different from MANET due to high mobility of nodes and the large scale of networks. The escalating amount of budding applications related to intelligent transportation systems (ITSs) has attracted more number of researchers to the area of vehicular networks (VNs). Some main curriculums of applications have lately gained popularity, i.e., security, scalable, safety, and traffic information and service location applications. In our paper we discussed what the challenges, attacks faced by vehicular networks and we provided solutions for some of the challenges which comprises more important factor. For improving scalability in vehicular network we introduced two sets of protocol (LocVSDPs and GeoVCom) and also suggested a set of resolution to progress the security in VANET.