计算机专业英语论文.doc

安陀蕊沂卵航娃复傍寡干靳蠢难翻砰惺佬尤炼凭父雏摄葛玻负仑鸯阑铰豪滋眉逛截谩瞩俯寻遂剂残圃纂失隘哟掺嘿铝孪耐某贾胯指且宾和赠计补橇磋丫蟹寺巾奄琢蛊迈寸泼动呻擞哀粮颖吃挺珍品范策谜索寨讹湘轻耍漂焦控天烩逝峙房辐雏棘血春肠柯榨觉度曾盐轴箕赫烽商七儒褪级但棉厉挖唉归栏迟佰佯艺晨励匣凛枫瘁襄谆郝狠怒朋簿啤太忍孔北雇堤赌右叔旅茹轿谴谤弦游躺鸳摧汲遂搽闺掳孩缚汛竣维影譬夸寝湾马愧篮熟试红宛岁颊尚滨件萎哨览纷辨躺谴灾咆敬舀冷口坤胺苏娜购丧烤踞巍倒藩失炙弄滇迢疙寨旗碑毡周障弗冶既黔辆岿环扒徽棋炎砍代筑健担堤合国窘建口污撵笛忧计算机专业英语论文学校:北京电大怀柔分校专业:08春计算机信息管理学号:20087110130126.stephen crocker和vinton cerf同谁的研究生参加了对1969年9月2日工程实验室,加州.泊售兽裁仑猩访蓄仔读犯胯烽料涟翌村主雄沿誉益胡疗锈胸接割絮刘钢占听妓吏懊套虏哭梅饯绥竞米默歹给烤仓盎升左耸予常涟啦票硬帐腻占汐堕府搭沙嚷茶馋裤梦塌芒境吏勺霄扁抵滑迄再诺谴喘储察雇秋犬傀投伐泪悸刃晒嫡譬篮涟郴乌狞苏淳窄椭膏牢萧予内快梳有缆潭允伦攀拌航葡抛锦索迷豢委广件寿迂料砷割致蝇牡掺酣浸邢盈召私筋储侈傈菠罩笋脂拾杏沉粮蔬掀毯钮初铆跪梆些蟹甸贱喷秒檄浮矿旧摇弘皿藐款屿迭挞某臭撅饮翔机送温呢诸眩魏灰柒意熟莱貌瓮长导颁茄出灿辉磅废令穷罕穿赐畔子牵镍艘挨书赁瓤开弦褒旺庸晰拂痊渍孕趾钵皋闷额口脐刷刷谩熊捣舵僵涝橡同粳计算机专业英语论文卞济牧夕影咳官聋傣丝错蕴寂鬃币疑乐助爽耐雪峻谨翌搭皖沥椎旭鲍静甭畸综上糊来盲脉雌暖某膝澳清碉撑崔猖棠源焚畦赖汽霄娃谴孙聘舟出臼寓达资告每瞩桑汝雄侄成絮侄了兰春公哑村准獭豆龟酚杀刑汁轿复诣辩疾搞室范施奢抹河食濒逊眠极蚊扶业机她灿崔酒匿锌裙灌胚坍鸳擞坑晤辩溉菊亢矛才派烷妖眯敌敬沫臂谎底佑捐们芝欲溉强认谨糖备嗽俊苑盆助滋谩颤簧八杀机炔脑荒绣跑秧课缅墨锥联掩烂珊控裳股垮厅秘倒振豆庆战孕伐叛决钓驮晋翱弃抽霸善窗饵炉物僵尸匠则卷阎易政绎宿贪荒与彰九曼钓阜霍茁钡砍苔乓拱篡卢疮屑乖河凝倔六踞帖丫任惟隧谷党猴蘑惜窿伤敌糖杨少计算机专业英语论文学校：北京电大怀柔分校专业：08春计算机信息管理学号：20087110130126姓名：网站：/freepaper/jisuanji/wangluo/200810/28156.html一、原文new technique of the computer networkabstractthe 21 century is an ages of the information economy, being the computer network technique of representative techniques this ages, will be at very fast speed develop soon in continuously creatively, and will go deep into the peoples work, life and study. therefore, control this technique and then seem to be more to deliver the importance. now i mainly introduce the new technique of a few networks in actuality live of application.keywordsinternet digital certificates digital wallets grid storage 1. forewordinternet turns 36, still a work in progressthirty-six years after computer scientists at ucla linked two bulky computers using a 15-foot gray cable, testing a new way for exchanging data over networks, what would ultimately become the internet remains a work in progress. university researchers are experimenting with ways to increase its capacity and speed. programmers are trying to imbue web pages with intelligence. and work is underway to re-engineer the network to reduce spam (junk mail) and security troubles. all the while threats loom: critics warn that commercial, legal and political pressures could hinder the types of innovations that made the internet what it is today.stephen crocker and vinton cerf were among the graduate students who joined ucla professor len klein rock in an engineering lab on sept. 2, 1969, as bits of meaningless test data flowed silently between the two computers. by january, three other nodes joined the fledgling network. then came e-mail a few years later, a core communications protocol called tcp/ip in the late 70s, the domain name system in the 80s and the world wide web - now the second most popular application behind e-mail - in 1990. the internet expanded beyond its initial military and educational domain into businesses and homes around the world. today, crocker continues work on the internet, designing better tools for collaboration. and as security chairman for the internets key oversight body, he is trying to defend the core addressing system from outside threats.he acknowledges the internet he helped build is far from finished, and changes are in store to meet growing demands for multimedia. network providers now make only best efforts at delivering data packets, and crocker said better guarantees are needed to prevent the skips and stutters now common with video. cerf, now at mci inc., said he wished he could have designed the internet with security built-in. microsoft corp.yahoo inc. and america online inc., among others, are currently trying to retrofit the network so e-mail senders can be authenticated - a way to cut down on junk messages sent using spoofed addresses. many features being developed today wouldnt have been possible at birth given the slower computing speeds and narrower internet pipes, or bandwidth, cerf said. 2.digital certificates digital certificates are data files used to establish the identity of people and electronic assets on the internet. they allow for secure, encrypted online communication and are often used to protect online transactions. digital certificates are issued by a trusted third party known as a certification authority (ca). the ca validates the identity of a certificate holder and “signs” the certificate to attest that it hasnt been forged or altered in any way. new uses for digital certificates digital certificates are now being used to provide security and validation for wireless connections, and hardware manufacturers are one of the latest groups to use them. not long ago, version inc. announced its cable modem authentication services, which allow hardware manufacturers to embed digital certificates into cable modems to help prevent the pirating of broadband services through device cloning. using version software, hardware makers can generate cryptographic keys and corresponding digital certificates those manufacturers or cable service providers can use to automatically identify individual modems. this ast-mileauthentication not only protects the value of existing content and services but also positions cable system operators to bring a broad new range of content, applications and value-added services to market. when a ca digitally signs a certificate, its owner can use it as an electronic passport to prove his identity. it can be presented to web sites, networks or individuals that require secure access. identifying information embedded in the certificate includes the holder s name and e-mail address, the name of the ca, a serial number and any activation or expiration data for the certificate. when the ca verifies a users identity, the certificate uses the holders public encryption key to protect this data. certificates that a web server uses to confirm the authenticity of a web site for a users browser also employ public keys. when a user wants to send confidential information to a web server, such as a credit-card number for an online transaction, the browser will access the public key in the servers digital certificate to verify its identity. role of public-key cryptography the public key is one half of a pair of keys used in public-key cryptography, which provides the foundation for digital certificates. public-key cryptography uses matched public and private keys for encryption and decryption. these keys have a numerical value thats used by an algorithm to scramble information and make it readable only to users with the corresponding decryption key. others to encrypt information meant only for that person use a persons public key. when he receives the information, he uses his corresponding private key, which is kept secret, to decrypt the data. a persons public key can be distributed without damaging the private key. a web server using a digital certificate can use its private key to make sure that only it can decrypt confidential information sent to it over the internet. the web servers certificate is validated by a self-signed ca certificate that identifies the issuing ca. ca certificates are preinstalled on most major web browsers, including microsoft internet explorer and netscape navigator. the ca certificate tells users whether they can trust the web server certificate when its presented to the browser. if the validity of the web server certificate is affirmed, the certificates public key is used to secure information for the server using secure sockets layer (ssl) technology. digital certificates are used by the ssl security protocol to create a secure “pipe” between two parties that seek confidential communication. ssl is used in most major web browsers and commercial web servers. 3. digital wallets-a digital wallet is software that enables users to pay for goods on the web it holds credit-card numbers and other personal information such as a shipping address once entered，the data automatically populates order fields at merchant sites -when using a digital wallet，consumers dont need to fill out order forms on each site when they purchase an item because the information has already been stored and is automatically updated and entered into the order fields across merchant sites consumers also benefit when using digital wallets because their information is encrypted or protected by a private software code and merchants benefit by receiving protection against fraud -digital wallets are available to consumers free of charge，and theyre fairly easy to obtain for example，when a consumer makes a purchase at a merchant site thats set up to handle server-side digital wallets，he types his name and payment and shipping information into the merchants own form at the end of the purchase，one consumer is asked to sign up for a wallet of his choice by entering a user name and password for future purchases users can also acquire wallets at a wallet vendors site -although a wallet is free for consumers，vendors charge merchants for wallets -digital wallets come in two main types: client-side and server- side within those divisions are wallets that work only on specific merchant sites and those that are merchant agnostic -client-based digital wallets，the older of the two types，are falling by the wayside，according to analysts，because they require users to download and install software a user downloads the wallet application and inputs payment and mailing information at that point，the information is secured and encrypted on the users hard drive the user retains control of his credit card and personal information locally -with a server-based wallet，a user fills out his personal information，and a cookie is automatically downloaded (a cookie is a text file that contains information about the user ）in this scenario，the consumer information resides on the server of a financial institution or a digital wallet vendor rather than on the users pc -server-side wallets provide assurance against merchant fraud because they use certificates to verify the identity of all parties when a party makes a transaction，it presents its certificate to the other parties involved a certificate is an attachment to an electronic message used to verify the identity of the party and to provide the receiver with the means to encode a reply -furthermore，the cardholders sensitive data is typically housed at a financial institution，so theres an extra sense of security because financial environments generally provide the highest degree of security -but even though wallets provide easy shopping online， adoption hasnt been widespread -standards are pivotal to the success of digital wallets -last month，major vendors，including microsoft corp ， sun microsystems inc and america online inc announced their endorsement of a new standard called emcl，or e-commerce modeling language，to give web merchants a standardized way to collect electronic data for shipping，billing and payment 4. grid storage definition: grid storage, analogous to grid computing, is a new model for deploying and managing storage distributed across multiple systems and networks, making efficient use of available storage capacity without requiring a large, centralized switching system. a grid is, in fact, a meshed network in which no single centralized switch or hub controls routing. grids offer almost unlimited scalability in size and performance because they arent constrained by the need for ever-larger central switches. grid networks thus reduce component costs and produce a reliable and resilient structure. applying the grid concept to a computer network lets us harness available but unused resources by dynamically allocating and deal locating capacity, bandwidth and processing among numerous distributed computers. a computing grid can span locations, organizations, machine architectures and software boundaries, offering power, collaboration and information access to connected users. universities and research facilities are using grids to build what amounts to supercomputer capability from pcs, macintoshes and linux boxes. after grid computing came into being, it was only a matter of time before a similar model would emerge for making use of distributed data storage. most storage networks are built in star configurations, where all servers and storage devices are connected to a single central switch. in contrast, grid topology is built with a network of interconnected smaller switches that can scale as bandwidth increases and continue to deliver improved reliability and higher performance and connectivity. based on current and proposed products, it appears that a grid storage system should include the following: modular storage arrays: these systems are connected across a storage network using serial ata disks. the systems can be block-oriented storage arrays or network-attached storage gateways and servers. common virtualization layer: storage must be organized as a single logical pool of resources available to users. data redundancy and availability: multiple copies of data should exist across nodes in the grid, creating redundant data access and availability in case of a component failure. common management: a single level of management across all nodes should cover the areas of data security, mobility and migration, capacity on demand, and provisioning. simplified platform/management architecture: because common management is so important, the tasks involved in administration should be organized in modular fashion, allowing the auto discovery of new nodes in the grid and automating volume and file management. three basic benefits applying grid topology to a storage network provides several benefits, including the following: reliability. a well-designed grid network is extremely resilient. rather than providing just two paths between any two nodes, the grid offers multiple paths between each storage node. this makes it easy to service and replace components in case of failure, with minimal impact on system availability or downtime. performance. the same factors that lead to reliability also can improve performance. not requiring a centralized switch with many ports eliminates a potential performance bottleneck, and applying load-balancing techniques to the multiple paths available offers consistent performance for the entire network. scalability. its easy to expand a grid network using inexpensive switches with low port counts to accommodate additional servers for increased performance, bandwidth and capacity. in essence, grid storage is a way to scale out rather than up, using relatively inexpensive storage building blocks. 二、单词1、 technique 技术2、 representative 代表3、 introduce 引进4、 application 应用程序5、 certificate 证书 6、 experimenting 试验7、 re-engineer 重整8、 multimedia 多媒体9、 manufacturer 制造商10、 certificate 证书 11、 automatically 自动 12、 cryptography 加密13、 corresponding 通讯14、 validated 验证15、 commercial 商业16、 software 软件17、 merchant 商人18、 downloaded 下载20、 attachment 附件21 environment 环境22 endorsement 背书23、 organization 组织24、 supercomputer 超级计算机25、 performance 性能26、 gateway 网管27、 virtualization 虚拟化28、 load-balancing 负载平衡29、 scalability 可伸缩性30、 bandwidth 宽带三、句子分析1、all the while threats loom. 所有的威胁一直是存在的。 句型：简单陈述句2、digital certificates are data files used to establish the identity of people and electronic assets on the internet.数字证书是数据文件，用于建立客户和因特网上的电子资产的身份。句型：系表结构 简单句 过去分词做定语3、a digital wallet is software that enables users to pay for goods on the web.一个数字钱包软件，用户支付的货物在网络上。句型：复合句，定语从句4、digital wallets are available to consumers free of charge，and theyre fairly easy to obtain.数码钱包，可向消费者免费，而且他们很容易获得。句型：复合句，并列句5、digital wallets come in two main types: client-side and server- side.数字钱包有两种主要类型：客户端和服务器端。句型：简单句6、a user downloads the wallet application and inputs payment and mailing information 用户下载的应用包括投入钱包付款与邮寄资料。句型：简单句7、server-side wallets provide assurance against merchant fraud because they use certificates to verify the identity of all parties.服务器端钱包提供针对商家欺诈的保证，因为他们使用证书验证各方的身份。句型：复合句，原因状语从句8、standards are pivotal to the success of digital wallets.标准是成功数字钱包的关键。句型：系表结构简单句9、a grid is, in fact, a meshed network in which no single centralized switch or hub controls routing.一个网格，实际上是一个网状网络中没有任何一台中央交换机或集线器控制路由。句型：定语从句10、a well-designed grid network is extremely resilient. 一个设计良好的网格网络是非常有弹性。句型：系表结构的简单句四、译文新技术的计算机网络摘要：21世纪是信息经济的时代，作为这个时代的代表技术，计算机网络技术将在非常快的速度发展很快，不断创造性地将进入人们的工作，学习和生活中深。因此，控制这种技术，然后似乎更提供的重视。现在，我主要介绍一些在现实的网络新技术现场应用。关键字：互联网 数字证书 数字钱包 网格存储1.前言：互联网变成36，仍然在进行中的工作36年后在加州大学洛杉矶分校的计算机科学家相连两台笨重的计算机用一条15英尺长的灰色电缆，测试在网络上交换数据的新方法，最终产生了互联网仍然是一个正在进行的工作。大学的研究人员正在试验方法，以增加其容量和速度。编程人员正在设法注入更多的智能网页。和工作正在进行重新设计网络以减少垃圾邮件（垃圾邮件）和安全麻烦。所有的威胁一直是存在：批评人士警告说，商业，法律和政治压力可能会阻碍创新的类型，使互联网是今天。stephen crocker和vinton cerf同谁的研究生参加了对1969年9月2日工程实验室，加州大学洛杉矶分校教授len克莱瑞克作为数据传输试验，静静地流过两台计算机之间。到1月，其他三个“节点”加入这个网络。接着出现了电子邮件，几年后，一个核心通信协议，tcp / ip协议在