畢業設計(論文)-基于內容中心網絡開發平臺的文件分享精選

基于內容中心網絡開發平臺的文件分享摘要當前的網絡環境與網絡誕生之初時相比已經發生變化，信息更多被用于分享和合作，而非僅僅從一地傳送至另一地，基于TCP/IP的現有互聯網已經逐漸暴露出許多不適應。在這樣的背景下，一種以“方便內容的存取”為原則設計而成的新型網絡架構體系——內容中心網絡應運而生。論文首先從分析當前互聯網存在的弊端入手，總結出了幾點當前互聯網所暴露出來的問題，并提出解決這些問題的一些方案，這其中主要包括兩種——“演進型”和“革命型”，簡單分析之后指出“革命型”才是長久之計，進而引出論文將要研究的重點——內容中心網絡(CCN)。論文具體闡述了CCN的體系結構、設計目標和原則以及通信機制，并與當前的TCP/IP網絡做了一個簡單的對比，指出CCN的優勢所在，最后列舉了當前CCN的幾個研究熱點。在做過理論上的研究之后，基于內容中心網絡開發平臺CCNx進行了一個探究性的文件下載實驗，具體實現的功能是客戶端能根據各服務節點的狀態信息智能選擇最優下載節點進行文件下載。本實驗主要是在CCN文件下載過程中增加一個選路的過程，目的是節省網絡帶寬，減少網絡擁堵，縮短請求者對服務節點的額外占用時間。應用到實際中，當要下載的文件很大，服務節點很多，鏈路結構很復雜時，選路所帶來的好處會更加明顯。另外通過本次實驗我們也驗證了CCN路由器的緩存功能，緩存功能是CCN網絡架構的一大優勢所在。關鍵詞內容中心網絡(CCN) CCNx文件下載FILE SHARINGBASED ON THE CONTENT-CENTRIC NETWORKDEVELOPMENT PLATFORMABSTRACTWhen compared to the beginning ,the current network environment has changed a lot. The information has been mainly used to share rather than merely transferred from one place to another.The current IP-based network has revealed many insuitable aspects. The traditional host-centric Internet can no longer meet people’s needs on the network size、function and performance.This paper starts from the analysis of the current Internet drawbacks and pointed out the problems exposed by Internet. Thus some programs which mainly include two kinds——“evolution” and “revolution” are forwarded to address these issues.After simple analysis ,the“revolution” is considered as the long-term solution. Then CCN, the focus of the study in this paper is forwarded. Firstly a brief introduction of the four kinds of CCN——NDN、DONA、PSIRP and Netinf is given including their basic design and overall architecture. Then the representative NDN is taken as an example for further research and discussion. The paper specially addresses the NDN architecture, design objectives and principles, as well as the communication mechanism and also make a simple comparison with the current TCP/IP network to point out the advantages of NDN.An inquryfile sharing experiment is carried out after the theoretical research. Specifically speakin

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