论文总字数：22189字

摘 要

由于互联网的广泛普及应用，人们迎来了庞大的信息安全挑战。当今社会中小企业的发展迅速，导致人们对网络的处理和传输性能有了新的要求。由于网络访问路由器和终端访问设备已过时，性能和可伸缩性方面的瓶颈严重影响了客户服务、网络服务的发展和质量。路由器根据网络拓扑找到转发网络数据的最佳路由。错误的路由信息将使网络数据包在网络中的传输效率低下，不正确，甚至使网络瘫痪。考虑到中小企业的背景，本文档概述了中小企业网络项目，以避免设备性能低下的瓶颈问题，从而提高企业网络项目的可扩展性。

本文首先概述了中小企业网络产生的背景和意义，并探讨了中小企业网络的研究开发现状和应用现状。除了常用的路由协议，网络工程还涉及对RIP，OSPF，静态路由，VLAN分区和数据流控制的相关技术理论的分析。其次，该项目讨论企业网络分析和总体设计的需求，包括对IP地址规划和网络拓扑的描述和分析。接着详细讨论了基于OSPF协议的网络工程的设计与实现。最后，对整个网络进行了测试。

关键词：中小型企业网络工程；路由协议；OSPF；链路状态；数据包；身份验证；密钥

Abstract

The widely use of the Internet has brought enormous challenges of people’s information security. With the rapid development of small and medium-sized enterprises, there are new requirements in network processing and transmission performance. Owing to the older age of network access routers and terminal access devices, their performance and scalability cause bottlenecks, which have severe affected the development of network business and the quality of customer service. According to the topology structure, the router looks for the best route to realize the forwarding of network data. In addition, without the correct router information, the efficiency of network packet transmission will be low or incorrect, and may even lead to network paralysis. In short, based on the background of small and medium enterprises, this paper aims at avoid the bottleneck problem caused by the poor performance of equipment in internet engineering of small and medium-sized enterprises, so as to improve the expansion ability of enterprise network engineering.

Above all, this research summarizes the background and significance of small and medium-sized enterprise networks, and discusses its application status and development status. Then the author analyzes the commonly used routing protocols involved in network projects. Besides, the author briefly discusses related technical theories such as OSPF protocol, RIP protocol, VLAN division, static routing, and data flow control. Secondly, combined with the project engineering, this paper discusses the demand analysis and overall design of enterprise internet, which including the analysis and description of the IP address planning, network topology, etc. Thirdly, the design and implementation of network projects based on OSPF protocol are emphatically discussed. At the same time, then the design and implementation of network engineering based on OSPF protocol are discussed in detail. Finally, the entire network was tested.

Keywords: network engineering for small and medium-sized enterprises; routing protocol; OSPF; link state; data packet; identity verification; key

目录

摘要 3

Abstract 4

目录 4

第一章 绪论 6

1.1 网络工程的介绍 6

1.2 企业网的背景及意义 6

1.3 国内外研究现状分析 7

1.4 论文的组织结构 8

第二章 网络工程的相关技术理论介绍 9

2.1 计算机网络的类型 9

2.2路由简介 9

2.3 路由的类型 10

2.4 动态路由的工作原理及类型 10

第三章 OSPF协议的介绍 12

3.1 OSPF协议概述 12

3.2 OSPF协议的特点 12

3.3 OSPF的基本概念 12

3.4 实现单区域OSPF路由协议 15

第四章 工程分析 20

4.1 功能需求分析 20

4.2 网络拓扑分析 21

4.3 可行性分析 21

4.3.1经济可行性 21

4.3.2技术可行性 22

4.4 三层拓扑架构 22

第五章 中小型企业网络工程的总体建设 23

5.1 工程设计的目的和原则 23

5.1.1工程设计的目的： 23

5.2 企业网络拓扑结构 23

第六章 工程实现 24

6.1 IP地址的具体分配 24

6.2 网络工程建设的实现方法 25

6.3 网络测试 26

6.3.1 DHCP测试 26

6.3.2 全网连通性测试 26

6.3.3 ACL测试 28

6.3.4 NAT测试 29

6.4 工程实现的源代码 31

6.4.1 RT1 31

6.4.2 RT2 32

6.4.3 RT3 33

6.4.4 SW1 34

6.4.5 SW2 36

6.4.6 SW3 38

结论 41

致谢 41

参考文献 42

第一章 绪论

1.1 网络工程的介绍

网络工程是根据用户需求和特定条件，结合当今时代网络技术的开发水平，同时对网络产品的适应程度，通过对用户需求和市场研究的全面分析，再确定网络建设计划并实施。

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