Mobile nodes of various routing protocols in Mobile Ad hoc Networks followdifferent strategies in transmission and receiving of data. Security, packetdelivery and routing overhead are important concerns for any protocol duringdesigning them. The presence and absence of malicious nodes in the networkaffect a lot on the performance of the protocol. This research is mainlyfocused on the study of the threats, attacks and reasons for malicious behaviorof nodes in the network for reactive routing protocols in MANETS. DSR and AODVare the two reactive routing protocols that were considered for the study topropose a second chance strategy to be given to the nodes considering thereason for malicious behavior to improve the packet delivery ratio and reducethe routing overhead in the network. A simulative study has been conductedusing Ad hoc Simulator (ASIM) considering the DSR and AODV routing protocols inthe presence of malicious nodes and in the absence of malicious nodes whichshowed that the packet delivery ratio is low and routing overhead is high inthe absence of malicious nodes. The second chance strategy proposed considersthe reasons for malicious behavior and helps the node to get reintegrated inthe network to improve the packet delivery ratio and reduce the routingoverhead.
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机译：移动自组织网络中各种路由协议的移动节点在数据的传输和接收中遵循不同的策略。安全性，数据包传递和路由开销是设计过程中任何协议的重要考虑因素。网络中是否存在恶意节点会严重影响协议的性能。这项研究主要集中在对MANETS中的反应式路由协议的网络中节点的威胁，攻击和恶意行为的原因进行研究。 DSR和AODV是研究中考虑的两种反应式路由协议，旨在考虑到恶意行为的原因，为节点提供第二种机会策略，以提高数据包的传输率并减少网络中的路由开销。使用Ad hoc Simulator（ASIM）在存在恶意节点和没有恶意节点的情况下考虑DSR和AODV路由协议进行了仿真研究，结果表明，在没有恶意节点的情况下，数据包的传递率很低，路由开销也很高。提出的第二种机会策略考虑了恶意行为的原因，并帮助节点重新集成到网络中，从而提高了数据包的传输率并减少了路由开销。
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