Abstract: Network Security is always foremost and big issue in wired and wireless network. Wireless network, whether it is infrastructure mode or mobile adhoc mode, breaks the barriers of wired network and are easily accessible to everyone but everything is at a cost, the cost is in the form of increased susceptibilities and vulnerabilities of network. Packet delay is a result of poor utilization of network capacity when it is integrated with routing algorithms. Routing protocol contains very serious security issues in adhoc network. The code of AODV and DSDV are having such issues and new protocol are extended in the form of SEAD, SEAR and SAODV. This paper analyses the ways the security is breached by the hackers who emerge as malicious node in Infrastructure as well as in adhoc mode of network. The handiwork is prepared by way of Developing experimental Testbed and simulation in NS2 then proper measure are proposed in order to overcome all the problems.