Wireless communication is the transfer of information between two or more points that are not connected by an electrical conductor. In order to communicate each other, the nodes cooperatively forward data packets to other nodes in the network by using the routing protocol; they are vulnerable to many severe attacks. They address so many attacks as wormhole attack, Sybil attacks, man-in-middle attacks, sinkhole attacks, jamming attacks and flooding attacks e.t. Routing is a crucial factor of security in MANET and hence the focus of this paper along with the performance analysis of routing protocols.