网络工程需求分析_参考1XX大学校园网络工程项目学号:姓名:日期:2011年月日目录1(前言 ..................................................................... (2)2(用户业务需求分析 ..................................................................... ................................. 2 (1用户业务类型需求分析...................................................................... ................ 2 22(2网络功能需求分析...................................................................... .. (2)2(2(1信息交流功能 ..................................................................... (2)2(2(2教学服务功能 ..................................................................... (2)2(2(3(学生学习功能 ..................................................................... . (3)2(2(4(学校管理功能 ..................................................................... . (3)3(网络性能需求分析 ..................................................................... ................................. 3 3(1(网络结构需求分析 ..................................................................... (3)3(1(1.拓扑结构需求分析 ..................................................................... .. (3)3(1(2. 网络节点需求分析...................................................................... (4)3(1(3.网络链路需求分析 ..................................................................... ........... 4 3(2(网络扩展性需求分析...................................................................... .. (4)3(2(1(用户业务的扩展性 ..................................................................... (4)3(2(2(网络性能的扩展性 ..................................................................... (4)(2(3(网络结构的扩展性 ..................................................................... ......... 4 33(2(4(网络软件的扩展性 ..................................................................... ......... 5 3(3.网络性能需求分析...................................................................... ....................... 5 3(4.网络安全需求分析...................................................................... .. (5)3(4(1系统软件和硬件的安全需求 (5)3(4(1(数据安全需求: .................................................................... . (5)3(4(2(用户认证需求: .................................................................... ............. 6 3(5.网络可靠性需求分析 ..................................................................... .................... 6 3(6.网络管理需求分析...................................................................... ....................... 6 3(7.网络投资约束条件分析: .................................................................... .. (6)11(前言校园网是利用网络设备、通信介质和适宜的网络技术与协议以及各类系统管理软件和应用软件，将校园内计算机和各种终端设备有机地集成在一起，并用于教学、科研、学校管理、信息资源共享和远程教育等方面工作的计算机局域网络系统。
XX学校作为一所的本二学校，建立校园网络已经成为学校的一项基础建设工作，它直接关系到学校的教学和科研工作的质量水平，关系到学生在人才市场上的受欢迎程度，关系到学校的生存与发展。
2(用户业务需求分析2(1用户业务类型需求分析根据我公司对贵校基本情况的了解，用户信息点在1000个以下，地理分布范围在一个区域内,即一个校区，主要用于学校内部网络通信，也会利用因特网进行外部业务活动，但是，网络流量主要集中于企业内部，因此对网络交换能力要求较高，校园网上网会有多媒体教学，视频点播等多种带宽应用。
是一个典型的中学校园网案例.2(2网络功能需求分析2(2(1信息交流功能信息交流功能主要有两个方面的服务功能:互联网信息服务和校内信息服务。
互联网信息服务可以使任何一个办公室的计算机都能实现网上浏览、查询信息的功能，使教师能够拓宽视野，充分利用互联网上的资源辅助教学，提升教学理念，提高教师的教学能力、教学水平和科研能力。
可以充分利用互联网资源来宣传学校，展示学校的办学能力与办学水平，展示教师的教学能力与科研能力，提升学校的办学形象。
校内信息服务能为教育教学和管理决策提供各项信息服务，能为全校师生提供相互交流、相互学习的平台。
2(2(2教学服务功能构建校园网的主要目的就是提高教学质量，为学校的教育教学服务。
校园网将主要从以下几个方面为教学服务。
,1,建立课件,基件,、教学信息资源库，实现课件点播和辅助教学。
将教学资源库建设成为包括各科的教材、教案、试题、录像、图片等对教师备课有参考价值的多媒体素材库。
,2,利用网络技术，实现多媒体信息交换、视频点播、远程教育等功能。
,3,建立电子备课室、光盘阅览室。
电子备课室为教师提供优越的电脑制作条件，配备各0.01 determined by calibration of the method. Constant component in the determination of standard solution concentration range of rousNa2CO3, calculate the exact concentration of the HCl solution. Most accurate concentrations of the standard solution arequantitative response fully, and then consumed in the titration of aqueous solution of HCl volume and quality of anhyd 1 in dilute solution, and then use the anhydrous Na2CO3 benchmark solution titration accurately weigh the material until both-0.1mol • L 1HCl standard solution, first with a certain amount of concentrated HCl diluted with water, mixed concentration is about-.1mol • Lits exact concentration. This determinesits exact concentration is called calibration. For example, for the preparation of 0 termineItAAAASA Close to the desired solution was prepared, and then use the reference material (or another material standard) to de2"quantity" concept e prepared solution choose what kind of vessel. That accurate, it should be very strict tolerances can be less stringent. Thees; thation should be determined on the balance at the level of the weighing; record should be written to several significant figurd three volumes of water and mix. Preparation of solution, according to the requirements on the accuracy of solution concentrcid anl concentrated H2SO4 volume 1 volume, mix with 1 volume of water. And as 1:3 HCl, the original volume 1 volume hydrochloric ation methods of 1:1 (or 1+1), 1:2 (1+2) volume is expressed as concentration. For example, 1:1 solution of H2SO4, the originaeservaculated using volumetric flasks, pipettes, burets accurate operation, not sloppy. (B) the general solution preparation and pre to four digits after the decimal point. Volume calibration solution, if it were to participate in the concentration are calccurattion solution, everything is very strict and accurate. Weighing standard substances requires the use ofanalytical balance, aeigh in the scales, add the solvent (water), graduated cylinder or measuring cup amounts. But in the whole process of calibraaduated cylinders measuring liquids or solid reagents w1. Ofsolid acid and alkali solution prepared from original, generally only accurate to 1~2 significant figures, it can be gr-solution, it is usually prepared with about 0.1mol • The concentration of Llkali andardsolution, first solution was prepared, and then select the base material calibration. Do the titration with acid and aor is too large, affect the accuracy of the results. 2. calibration cannot be directly made accurate concentrations of the std errwas prepared solution, in principle only be diluted once, if necessary, dilute the secondary. Dilution of too many accumulate essary, corrected volume, and considering the effect of temperature. D calibration good of standardOperated by stock solutionre necs 20mL. C preparation of calibration solutions and use liquor, such as glassware, such as volumetric flasks and pipettes, whew, weighing at least 0.2G above; same titration at the end consumption of standard solutions or too small in size, the best iuce measurement error, weighing the baseline amount of substance should not be too fe in order to red?4, repeated at least three times, and called for determination of the relative deviation is less than 0.2%. -rmination of calibration should be parallel 3 dete?order to improve the accuracy of calibration, calibration should pay attention to the following points: 1, typically according to the components to be tested to select the height of the size of standard solution concentration. In-1 mol • L-1-mol • L 种先进的备课设备，方便教师备课使用,光盘阅览室提供大量的电子读物，发挥电子媒体容量大、体积小、成本低、检索快、易于保存和复制、图文并茂等优点，使教师能够用最短的时间获取最多的信息。