Building overall situation to install collectivity is to be on guard although DoS attack comes for years expert of countless networks safety is in the whole world exert oneself develops what DoS atttacks to settle way, but so far yield results is not big, because DoS atttacks the weakness that exploited TCP agreement itself,this is. DoS attack uses relatively simple attack method, can make target system breaks down completely, destroy whole network even. Because this Extreme Networks thinks, have the global have sth in mind from the network only, adopt on each levels of the infrastructure between the net answer measure, include to adopt special measure on level of local area network, reach undertake on network transmission level necessary safety is installed, the DoS with special installation identifies and prevent a tool, ability utmost ground reduces DoS to atttack the loss that causes.

Build the network security system of a such comprehensive systems, the fundamental framework of the network must be with three-layer exchange and road by the intelligence that is core network, go up in this foundation, the safe strategy that offers perfect three-layer above manages a tool, the security that provides pair of major runs the ability that software supports. Extreme Networks is three-layer is reached all the time multilayer the leader that exchanges a technology, offerring powerful bandwidth and rate for the user while, also have a very perfect network management tool, be aimed at DoS especially most the discharge that solves hard attack, extreme Ware management is covered offerred effective identifying mechanism and strong control method.

The will most advanced three-layer trade technology and multilayer and safe be on guard systematic couple rises, it is the optimal choice of the user that serious consideration resists DoS is atttacked. And the design phase that having a network, should transmit the level to undertake be decoratinged reasonably from level of local area network and network.

Problem of level of local area network

On level of local area network, systematic manager can adopt many precautionary measures, the service that prevents DoS attack to bring cannot effect. These precautionary measures include: Carry solid integral management and safe program, be aimed at attack of of all kinds DoS, carry out specific defensive measure to wait a moment. The other method that with specific DoS attack type concerns can include: Shut or limit the specific service that the likelihood is damaged or destroys in the dark. Regretful is, these limitative measure still must give lawful application possibly with its (the influence that if use UDP,brings as the Real Audio) of transmission mechanism has balance. If aggressor can threatening victim is not used beneficial

IP serves or apply legally, so go up in certain level, these hackers had achieved his goal.

The network transmits a problem

Although administrator of local area network is adopted measure is in prevent and is crucial effect in the fundamental job that beat back DoS atttacks, but they still must implement certain and perfect measure in network transmission layer, have effective complement with working to the foundation.
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