网络工程设计方案网络构架 毕业论文.doc

1专科生毕业设计 网网络络工工程程设设计计方方案案 -网网络络构构架架摘 要中小企业在一国的经济中发挥的作用具有不可替代性，但其进一步的发展却受到许多因素制约，这些因素中最突出的表现就是融资难中小企业融资难是一个普遍性的问题，包括融资渠道不畅、融资结构失衡、融资成本高等一系列融资难的问题已经对我国中小企业的进一步发展构成了瓶颈制约中小企业在融资方面的“营养”不良以及由此带来的“健康”状况上的每况愈下正引起人们的广泛关注本文立足企业和银行，着眼于整个社会信用环境和政府职能，遵循提出问题、分析问题以及依据国情并借鉴其他国家做法解决问题的基本思路，对我国中小企业融资问题的现状、成因和解决办法进行了深入的分析和探讨，力图做到系统综合，标本兼治[关键词] 中小企业 融资 成因 现状 解决对策ABSTRACTSME s roles playing in one national economy cannot be substituted by anything else, but SME s further development will subject to many factors, the most prominent aspect of which is SME s financing difficulty. SME s financing difficulty is a widespread issue, but the solutions of different countries or areas to it should be based differently upon their conditions in terms of what type of financing channels should be used in resolving financing issue. In present periods of our economic development,. This article based on enterprises and banks, focusing on the entire social credit environment and government 2functions, to follow questions, analyze problems and in accordance with national conditions and practices in other countries to solve the problem of the basic ideas, on China's small and medium enterprises financing the current situation, causes and solutions an in-depth analysis and discussion of trying to do systems integration, both temporary and permanent cures.[Key[Key words]words] SMEs Financing Innovation 目目 录录摘 要.........................................................................................................................................................................3 ABSTRACT................................................................................................................................................................3 目目 录录.........................................................................................................................................................................4 引 言.........................................................................................................................................................................2 第一章 项目需求分析...............................................................................................................................................2 1.1.项目背景项目背景.................................................................................................................................................3 1.2 需求分析需求分析.......................................................................................................................................................4 第二章 网络总体建设目标.......................................................................................................................................5 2.1网络建设目标网络建设目标.........................................................................................................................................5 2.2网络及系统建设内容及要求网络及系统建设内容及要求.................................................................................................................6 2.3网络设计原则网络设计原则.........................................................................................................................................8 第三章第三章 网络总体设计网络总体设计...............................................................................................................................................9 3.13.1 网络总体拓扑图网络总体拓扑图.........................................................................................................................................9 3.23.2 网络层次化设计网络层次化设计.......................................................................................................................................10 3.33.3 核心层设计核心层设计...............................................................................................................................................11 3.43.4 接入层设计接入层设计...............................................................................................................................................12 3.53.5 内联接入内联接入...................................................................................................................................................13 第四章第四章 路由设计路由设计.....................................................................................................................................................13 4.14.1 路由协议选择路由协议选择...........................................................................................................................................13 4.1.14.1.1 OSPFOSPF 协议主要优点：协议主要优点：..................................................................................................................13 4.1.24.1.2 SPFSPF 算法算法........................................................................................................................................13 4.1.34.1.3 OSPFOSPF 规定有层次的网路结构，规定有层次的网路结构，OSPFOSPF 将网络分为若干区域：将网络分为若干区域：.................................................14 4.1.44.1.4 OSPFOSPF 路由器在完全邻接之前路由器在完全邻接之前, ,所经过的几个状态所经过的几个状态: :............。