Abstract: “Mobile ad-hoc networks (MANETs) are a set of mobile nodes that communicate with each other within a common wireless media without the presence of a predefined infrastructure or a central control authority. The absence of preexisting infrastructure is the characteristic that make them ideal for different applications as the military applications. Ad hoc networks rely on routing protocols that are used by nodes to find and maintain routes. AOMDV is one of the well-known multi path routing protocols designed to this kind of networks. AOMDV is vulnerable to different attacks as the black hole attack like any other wireless routing protocol. Black-hole is a network layer attack that deteriorates network performance by capturing data traffic of neighboring nodes and then dropping all received packets. Therefore, securing routing protocols are the most important condition for any secure communication. Numerous solutions were proposed to protect AOMDV against black-hole attacks. A new cross-la”

Keywords: mobile, networks, AOMDV, black, hole, attack, cross, layer, interaction, performance evaluation.