毕业设计（论文）-VPN技术分析与实现.doc

摘要 PAGE I 摘要 PAGE I 摘要 随着Internet已成为全社会的信息基础设施，企业端应用也大都基于IP，在Internet上构筑应用系统已成为必然趋势，因此基于IP的VPN业务获得了极大的增长空间。本文介绍了虚拟专用网的技术原理和特点，以及利用VPN技术构建企业虚拟专用网的优势，提出利用公网的资源作为企业各级单位间传输信息的通道，在建设内部网实现信息安全共享的同时降低建设和维护成本，因此具有很好的应用前景。首先对VPN的技术的发展、优点等进行了分析；其次阐述了VPN的解决方案；最后，结合一个网络公司的实例说明企业VPN网络的具体实现。 关键词：虚拟专用网；虚拟局域网；网络安全；隧道技 Abstract Abstract Abstract As the Internet has become a society-wide information infrastructure, enterprise-based applications are mostly IP, to build applications on the Internet have become an inevitable trend, so the service which based on the IP-VPN was great room for growth. This paper presents a virtual private network technology principles and characteristics, and presents the advantages that the companies use the VPN technology to build the virtual private network, by using public networks at all levels of resources as a business unit of the channel to transmit information, in building internal networks to share information security At the same time reduce the cost of construction and maintenance, so VPN has good prospects. The article first tell us something about the development of technologies VPN and other advantages of an analysis ; and secondly about the VPN solutions; Finally, it combinates a securities company examples of the specific enterprise VPN network to achieve. Key words: VPN; VLAN; network security; tunnel 目录 第 PAGE III 页 目录 目录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc280796519 第一章 VPN技术概述 PAGEREF _Toc280796519 \h 1 HYPERLINK \l _Toc280796520 1.1 VPN产生的背景 PAGEREF _Toc280796520 \h 1 HYPERLINK \l _Toc280796521 1.2 VPN的定义 PAGEREF _Toc280796521 \h 1 HYPERLINK \l _Toc280796522 1.3 VPN的特点 PAGEREF _Toc280796522 \h 2 HYPERLINK \l _Toc280796523 1.4 VPN带来的好处 PAGEREF _Toc280796523 \h 3 HYPERLINK \l _Toc280796524 第二章 隧道技术 PAGEREF _Toc280796524 \h 5 HYPERLINK \l _Toc280796525 2.1概述 PAGEREF _Toc280796525 \h 5 HYPERLINK \l _Toc280796526 2.2隧道协议 PAGEREF _Toc280796526 \h 5 HYPERLINK \l _Toc280796527 2.2.1隧道协议 PAGEREF _Toc280796527 \h 5 HY