目 录
摘 要 .............................................................................................................................i
第 1 章 绪论 ................................................................................................................1
1.1 课题背景 ...........................................................................................................1
1.2 网络信息安全 ...................................................................................................1
1.3 本章小结 ...........................................................................................................1
第 2 章 计算机网络发展现状 ....................................................................................3
2.1 网络安全现状分析 ...........................................................................................3
2.2 网络安全问题根源 ...........................................................................................3
2.2.1 网络病毒入侵 ...........................................................................................3
2.2.2 安全局限性 ...............................................................................................3
2.2.3 安全问题复杂化 .......................................................................................4
2.2.4 本章小结 ...................................................................................................4
第 3 章 计算机网络的常见安全问题 ........................................................................5
3.1 物理安全威胁 ...................................................................................................5
3.2 内部网络威胁 ...................................................................................................5
3.3 计算机病毒入侵 ...............................................................................................6
3.4 计算机系统缺陷 ...............................................................................................6
3.5 黑客和黑客程序的攻击 ...................................................................................6
3.6 本章小结 ...........................................................................................................7
第 4 章 计算机网络安全技术及防范措施 ................................................................8
4.1 防火墙技术 .......................................................................................................8
4.1.1 防火墙的概念 ...........................................................................................8
4.1.2 防火墙的功能 ...........................................................................................8
4.1.3 防火墙安全访问方式 ...............................................................................8
