Cloud computing network and next-generation network is now widely used, which brings more security threats. Based on the process and the network tuples communication to construct defense system, the key technologies of defense under IPv4/IPv6 dual stack network are researched. It presents the NRLS Sunday based on improvement of the longest unique substring and Sunday algorithm, to avoid excessive repetitive character comparison and improve the matching efficiency of a single pattern string. Compared with BM, Sunday algorithm, the experiment shows the improved algorithm optimizes its time complexity. Under high-speed network, packet data contents is carried on rapid detection and analysis. Based on intelligent traffic restrictions for process and network, the intrusion detection and defense is conducted for network. In this paper, parallel packet detection method is studied under the high speed. Application web collaboration, and the unified arrangements and issued policies is applied in a complex network environment, proposing and realizing the effective method of defense in the complex network environment.
KEYWORDS: Switches, Switching, Signal processing, Remote sensing, Associative arrays, Data communications, Mobile communications, Signal analyzers, Motion analysis, Manganese
The idea of SDN provides a new way to solve the problems faced by mobility management of network layer in traditional networks. However, the existing mobility management schemes in SDN still face problems such as large network overhead and prolonged switching time in the process of user mobility. In this paper, the mobility management mechanism of network layer supporting IPv6 in SDN is studied. Firstly, by analyzing and designing two key technologies of mobility awareness and mobility handover, and combining with the position prediction theory, an IPv6 mobility management mechanism supporting pre-handover in SDN is proposed. Secondly, according to the result of position prediction, this mechanism calculates and issues the switching path runoff table before the movement, which reduces the signaling overhead and switching delay of the mobile node in the process of movement. Finally, according to the performance evaluation and analysis method, the signaling cost and switching delay of OPMIPv6-C scheme which is also implemented based on SDN are compared.
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