局域网监听防范措施.docVIP

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局域网监听的基本原理及防范措施 日期:2005-09-07 Along with calculator technical development, the network has already become the necessary tool in the life increasingly, but follows of the illegal entry also has been threaten the safety of the calculator network system. All local area network scanned when a lot of hackers invade be its most basic step and means with wiretap, reason is want obtain password etc. important information. But on the other hand,when we start to investigate the invading activity of hackers and other network crimes,we can also use the network si technique to obtain the information of the necessity. The protocols of network using now,was designed long time ago. Many of these protocols was base on a kind of very friendly of,both parties of the correspondence trust well of foundation.So lots of information are sent by clear statement. When the data is delivered,the data can got by other computers that are conjunction together . Because the data reports delivering a medium target host is to connect to read through a network into the data, carrying on a check, if taking in the data of the physical address is own to broadcast an address perhaps, then handing over to the data the upper level agreement software be also the IP layer software, otherwise throwing this away.For each arrive a network to connect the oscular data, all want to carry on this process. If informations such as the account and password etc. of the customer also deliver on the net by clear statement, but at this time a black guest or the network aggressor under way the network wiretap, as long as have first step of the network and TCP/IP negotiate knowledge, then the ability on a platter withdraws an interested in part from the wiretap to of the information.Manage together, the right usage network wiretap technique can also discover invade combines to be to the invader carry on tracking a fixed position, at carry on to the network crime investigate to obtain evidence obtain relevant

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