计算机网络安全研究摘要随着我国经济的不断发展，我国互联网的技术也在不断的更新，其中受到外来黑客攻击的事件也是屡见不鲜，严重影响了正常网络的使用，造成了沉重的经济损失。正因为现有计算机网络的先天缺陷，极易被别有用心的攻击者利用，造成目前黑客攻击、病毒入侵的发生。与此同时，随着计算机网络防范新技术、新方法的发展及投入使用，使正常的网络系统稳定性和安全性得到极大的保证。除此之外，计算机网络使用者其自身的安全意识，也会直接影响到其使用互联网的安全。关键词：网络安全防火墙计算机病毒AbstractWiththerapiddevelopmentofInternettechnologyinrecentyears,therehavebeenmanyattacksoncomputernetwork,whichhaveseriouslyaffectedtheuseofnormalnetworkandcausedheavyeconomiclosses.Becauseofthecongenitaldefectsoftheexistingcomputernetwork,itiseasytobeexploitedbyattackerswithulteriormotives,resultinginthecurrenthackerattack,virusinvasion.Atthesametime,withthedevelopmentandapplicationofnewtechnologyandmethod,thestabilityandsecurityofnormalnetworksystemareguaranteedgreatly.Inaddition,theuser'ssecurityawarenessisalsoanimportantaspectofcomputernetworksecurity.Keyword:NetworksecurityFirewallComputervirus目录引言...........................................................................................................................1一计算机网络安全的现状......................................................................................1二计算机网络的主要隐患......................................................................................2（一）环境灾害.................................................................................................2（二）黑客的威胁和攻击.................................................................................2（三）计算机病毒.............................................................................................3（四）垃圾邮件和间谍软件.............................................................................4（五）计算机犯罪.............................................................................................5三计算机网络的安全缺陷及产生原因..................................................................6（一）TCP/IP的脆弱性....................................................................................6（二）网络结构的不安全性.............................................................................6（三）网络窃听.................................................................................................6（四）缺乏安全意识.........................................................................................6四网络攻击和入侵的主要途径..............................................................................8（一）口令入侵.................................................................................................8（二）IP欺骗.....................................................................................................8（三）DNS欺骗................................................................................................8五计算机网络安全的防范策略............................................................................10（一）防火墙技术...........................................................................................10（二）数据加密技术.......................................................................................10（三）用户授权访问控制技术.................................................
