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In many Medium Access Control (MAC) schemes for wireless networks, an Acknowledgment (ACK) packet is transmitted from the data receiver to the data sender to announce the successful reception of the data packet. Such a protocol requirement may become a system weakness when malicious nodes attack these wireless networks. In this paper, we demonstrate the effects of such a Jamming ACK (JACK) attack to networks employing the popular Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)doi:10.1109/glocom.2008.ecp.950 dblp:conf/globecom/ZhangWDQ08 fatcat:yx7iheeyivdotdrodiwtio6rpa