信息網(wǎng)絡(luò)通信基礎(chǔ)-wenkub.com
2024-12-29 12:51 本頁面
【正文】 同時，局域網(wǎng)和廣域網(wǎng)的產(chǎn)生和逢勃發(fā)展對 Inter的進(jìn)一步發(fā)展起了重要的作用。泰勒 , ARPA署長 赫茲菲爾德 ) 27 Data Communications Networking ARPANET： 最初， ARPA主要是用于軍事研究目的，它主要是基于這樣的指導(dǎo)思想：網(wǎng)絡(luò)必須經(jīng)受得住故障的考驗而維持正常的工作，一旦發(fā)生戰(zhàn)爭，當(dāng)網(wǎng)絡(luò)的某一部分因遭受攻擊而失去工作能力時，網(wǎng)絡(luò)的其他部分應(yīng)能維持正常的通信工作。為了把這四個不同型號、使用不同操作系統(tǒng)、不同數(shù)據(jù)格式、不同終端的計算機(jī)連在一起實現(xiàn)相互通信和資源共享，有許許多多的人為此煞費(fèi)苦心、艱辛探索，付出了無數(shù)的心血。 1970年的 ARPANET已初具雛形，并且開始向非軍用部門開放，許多大學(xué)和商業(yè)部門開始接入。 ATM 24 Data Communications Networking A heterogeneous work made of four WANs and two LANs Interwork heterogeneous 不同種類的 25 Data Communications Networking 13 THE INTERNET因特網(wǎng) The Inter has revolutionized徹底改變 many aspects of our daily lives. It has affected the way we do business as well as the way we spend our leisure time. The Inter is a munication system that has brought a wealth of information to our fingertips and anized it for our use. A Brief History 歷史簡介 The Inter Today (ISPs) 因特網(wǎng)現(xiàn)狀（因特網(wǎng)服務(wù)提供商） Topics discussed in this section: 26 Data Communications Networking ARPA： Advanced Research Projects Agency (美國國防部 )高級計劃研究署 70年代初的美國深陷在越南戰(zhàn)場的泥潭中，不能自拔，而國內(nèi)的反戰(zhàn)呼聲一浪高過一浪。 less cabling。Data Communications Networking Chapter 1 Introduction 第一章 緒論 Department of Electronic and Communication Engineering NCEPU 1 Data Communications Networking 2 Data Communications Networking 3 Data Communications Networking 4 Data Communications Networking Chapter 1 Introduction 緒論 5 Data Communications Networking 11 DATA COMMUNICATIONS 數(shù)據(jù)通信 The term telemunication means munication at a distance. The word data refers to information presented in whatever form is agreed upon by the parties creating and using the data. Data munications are the exchange of data between two devices via some form of transmission medium such
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