Due to their natural quality and quantifiability, wireless networks area unit perpetually most popular since the primary day of their invention. Because of the improved technology and reduced prices, wireless networks have gained rather more preferences over wired networks within the past few decades. The defection to wireless technology from wired technology has been a global shift in the past few decades. The open system and remote distribution of nodes make MANET endangered to intruders. An emerging technique EAACK (Enhanced Adaptive ACKnowledgement) method designed for MANET was proposed for intrusion detection.