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毕业论文（设计） VLAN在校园网中的高效应用

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宋体、二号字、单倍行距—打印时请删除论文作者：刘秋婷指导教师：杨红强所属学院：数学与计算机科学专业：数学教育本科专科：专科年级： 2008级论文提交日期： 2008年4月20日论文答辩日期 2008年5月30日可为实际日期—打印时请删除

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黑体、小二号字、段前2行、段后2行、行距最小值22磅—打印时请删除宋体、小四号字、行距最小值22磅—打印时请删除毕业论文（设计）学术承诺

本人郑重承诺：所呈交的毕业论文是本人在导师指导下进行的研究工作及取得的研究成果。除了文中特别加以标注和致谢的地方外，论文中不存在抄袭情况，论文中不包含其他人已经发表的研究成果，也不包含他人或其他教学机构取得的研究成果。

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段后2行、行距最小值22磅

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页眉五号、宋体，双线0.5磅—打印时请删除 XX级XX专业毕业论文首先，选中摘要二字，设置为第一层次，然后设置两字字体为黑体、小四号字、行距最小值22磅；顶格写—打印时请删除论文题目：随机变量函数的分布

摘要：概率论是从随机变量的分布出发研究随机现象的统计规律的，因此关于随机变量的分布是概率论中的核心内容，而随机变量函数的分布又是这1核心内容的拓展与深化．对于随机变量函数的分布，楷体、小四号字、行距最小值本文论述了它的重要作用，提炼了它的知识结构，系统地论述了随机变量的各种变换．在此基础上，讨22磅—打印时请删除论了各分布之间的变换关系及性质，并给出了若干应用．这对于概率论知识结构的掌握和应用具有1定的参考价值．

关键词：随机变量函数；分布函数；分布密度；卷积公式．

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柳亚林：VLAN在校园网中的高效应用 By Random Variable Function Distribution

ABSTRACT

Probability theory starting from the distribution of random variables in the statistical study of random

phenomena, and therefore on ution of random variables probability theory is the core content and function of the distribution of random variables is the core content to expand and deepen. Regarding the random variable function distribution, this article elaborated its vital role, has refined its knowledge structure, systematically elaborated random variable each kind of transformation. in this foundation, discussed between each distribution transformation relations and the nature, and produced certain application. this to have the certain reference value regarding theory of probability knowledge structure grasping with the application.

Key word: Random variable function；distribution function；density of distribution；Convolution formula

空两行—打印时请删除一级标题为黑体、小四号字、行距最小值16磅—打印时请删除目录正文字体为黑体、三号字、行距最小值22磅、段前1行、段后1行、居中—打印时请删除摘要 ········································································································································· I Abstract ····································································································· 错误！未定义书签。二、三级标题均为宋体、小四号字、行距最小值16磅—打1 绪论 ········································································································································ 1 印时请删除 ·1.1 VLAN概述 ······················································································································ 1

1.2 Vlan的优点 ······················································································································ 1 1.2.1 控制网络的广播风暴 ······························································································· 1 1.2.2 确保网络安全 ··········································································································· 1 1.2.3 简化网络管理 ··········································································································· 1 2 Vlan的分类 ···························································································································· 2 2.1 基于MAC地址的Vlan ·································································································· 2 2.2.1 MAC地址 ·················································································································· 2 2.2 Vlan划分 ·························································································································· 2 结语 ········································································································································ 2 注释 ········································································································································ 2 参考文献 ···································································································································· 3 致谢 ········································································································································ 4

XX级XX专业毕业论文附录1 ········································································································································· 5

（此处插入分页符---打印时请删除）目录的生成方法：用户先留出目录页，然后设置正文格式，注意三级目录的设置：第一级，首先选中一级标题，单击格式工具栏中“样式”选项，设置为“标题一”，然后按照规范设置字体、自号及行距；依次设置第二级为标题二，相应的字体字号行距；第三级为标题三，相应的字体字号行距；正文设置完毕后，返回目录页，定位插入点。单击“插入”菜单，依次选择“引用”→“索引和目录”项，打开对话框；在对话框中选择“目录”选项卡，打开如图所示的界面。设置相应选项，显示级别为3，前导符为“??”，然后单击“修改”按钮，分别设置标题一、二、三的字体、字号、段前、段后等；设置完毕依次单击确定返回即可设置完目录。 —打印时请删除 III

柳亚林：VLAN在校园网中的高效应用 IV

XX级XX专业毕业论文 1 绪论

1.1 VLAN概述

VLAN（Virtual Local Area Network，虚拟局域网）是指在交换局域网的基础上，采用网络管理软件构建的可跨越不同网段、不同网络的端到端的逻辑网络??

1.2 Vlan的优点

1.2.1 控制网络的广播风暴

网络管理必须解决因大量广播信息带来带宽消耗的问题。Vlan作为一种网络分段技术，可将广播风暴限制在一个Vlan内部??如图1-1所示。

图1-1 Vlan的划分

1.2.2 确保网络安全

共享式局域网上的广播必然会产生安全性问题，因为网络上的所有用户都能监测到流经的业务，??如表1-1所示。

表1-1 大气环境中有害气体的检测方法

气体 SO2 NOx IR CO2 IR,ISE 热传导 O3 Uv Flon IR NH3 ISE 气相色谱 ISE H2S HCl ISE Uv，IR 方法导电率 1.2.3 简化网络管理