计算机网络安全安全与防范摘要众所周知网络是世界上最复杂体系之一,网络布局中的计算机分支也十分复杂。这种复杂包括电脑主机与网络终端两者无法精确层次关系、系统无防御系统外界的可以随意查看其内部结构,同时这两者还造成,使用计算机进入网络查询信息的用户,因为计算机本生漏洞,最终变成带有病毒的软件和目的性黑客的攻击对象,一但攻克系统,这些恶意软件或是黑客则会通过我方计算机非法获取机密文件、攻击其它计算机,这些攻击造成的结果注定我们不愿面对。当今社会网络遍及家家户户,网络安全也越来越被重视,上网时自己获取的内容安全程度和保密程度显得尤为重要,但人们网络中浏览信息时,自我防范意识、防范措施等也不能缺少。关键词:计算机;网络;网络安全AbstractIt is well known that the network is one of the most complex systems in the world. This complex includes mainframe computers and network terminal not precise hierarchy, system no defense system to see its internal structure of the outside world, also caused the two at the same time, using the computer into the network of information users, because the computer Bunsen loophole, eventually become with virus software and purpose of the hacker's attack object, but attack system, the malicious software or hacker will through our computer illegal access to confidential documents, attack other computer, the result of these attacks are destined we don't want to face. Today's social network throughout every household, network security is also more and more attention, Internet access to their own content security and confidentiality is particularly important, but when people browse information in the network, self-awareness, preventive measures can not be lack of.Key words: computer; Network; Network security目 录第一章 引 言...................................................................................................................................................1第二章 网络安全的含义及重要...