Amravati.

Today’s mobilizing world, corporation and government agencies are progressively used embedded and wireless technologies. Since the advent of wireless communication, the need for mobile ad hoc networks has been growing exponentially. MANET is a developing research area with applied applications. Due to fundamental characteristics of MANET, it is useful and more popular in mobilizing world. But these features such as open medium, dynamic topology, distributed cooperation and constrained capability are particularly vulnerable to MANET. The security is one of the important challenges in MANET. MANET’s topology poses many new challenges such as routing problem which can be solved by routing protocols. Routing plays an important role in security of the entire network. Routing is the central part of wireless ad hoc network. This paper focuses on the routing protocols and some of the vulnerabilities, specifically discussing attacks against routing protocol and analyzes the role of routing protocols in security