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Mobile ad hoc networks are often deployed in environments where the nodes of the networks are unattended and have little or
no physical protection against tampering. The nodes of mobile ad hoc networks are thus susceptible to compromise. The networks
are particularly vulnerable to denial of service (DoS) attacks launched through compromised nodes or intruders. In this paper,
we investigated the effects of flooding attacks in network simulation 2 (NS-2) and measured the packet delivery ratio and
packet delay under different flooding frequencies and different numbers of attack nodes. Simulation results show that with
the increase the flooding frequencies and the numbers of attack nodes, network performance drops. But when the frequency of
flooding attacks is greater than a value, the performance decrease gets smooth. Meanwhile the packet delay firstly increases
and then declines to a value of stability at the end. 相似文献
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