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href="http://www.cdcfah.com/cp/third-swfw_wlfw/">網(wǎng)絡(luò)服務(wù)</a>?南京國(guó)內(nèi)點(diǎn)對(duì)點(diǎn)軟件歡迎來(lái)電上海點(diǎn)對(duì)點(diǎn)科技供應(yīng)</p><div id="ydvspba" class="leftbox clearfix"><h1>南京國(guó)內(nèi)點(diǎn)對(duì)點(diǎn)軟件歡迎來(lái)電上海點(diǎn)對(duì)點(diǎn)科技供應(yīng)</h1><div id="k8kc2yv" class="proBig"><div id="r2moli7" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/decentral/637343774820546875/7716020.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="gol89li" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/decentral/637343774820546875/7716020.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="x2suwot" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>南京國(guó)內(nèi)點(diǎn)對(duì)點(diǎn)軟件,點(diǎn)對(duì)點(diǎn)</p><p><span>***更新：</span>2021-02-02 02:12:00</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="puroq7b" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海點(diǎn)對(duì)點(diǎn)科技有限公司</a></p><p><span>聯(lián)系人：</span>屈雅萍</p><p><span>郵箱: </span>519061116@qq.com</p><p><span>電話: </span>15214399978</p><p><span>傳真: </span>021_65668669</p><p><span>網(wǎng)址: </span>https://dianduidian.tech</p><p><span>手機(jī): </span>021-65668669</p><p><span>地址: </span>國(guó)定東路200號(hào)5號(hào)樓7樓</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="ic7uqxz" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="vkhevhe" class="box"><p><p style="text-indent:25px">P2P網(wǎng)絡(luò)樹(shù)形結(jié)構(gòu)，南京國(guó)內(nèi)點(diǎn)對(duì)點(diǎn)軟件。在這種結(jié)構(gòu)中，所有的節(jié)點(diǎn)都被組織在一棵樹(shù)中，樹(shù)根只有子節(jié)點(diǎn)，樹(shù)葉只有父節(jié)點(diǎn)，南京國(guó)內(nèi)點(diǎn)對(duì)點(diǎn)軟件，其他節(jié)點(diǎn)既有子節(jié)點(diǎn)也有父節(jié)點(diǎn)。信息的流向沿著樹(shù)枝流動(dòng)。較初的樹(shù)形結(jié)構(gòu)多用于P2P流媒體直播。網(wǎng)狀結(jié)構(gòu)又叫無(wú)結(jié)構(gòu)，南京國(guó)內(nèi)點(diǎn)對(duì)點(diǎn)軟件。顧名思義，這種結(jié)構(gòu)中，所有的節(jié)點(diǎn)無(wú)規(guī)則地連在一起，沒(méi)有穩(wěn)定的關(guān)系，沒(méi)有父子關(guān)系。網(wǎng)狀結(jié)構(gòu)為P2P提供了較大的容忍性、動(dòng)態(tài)適應(yīng)性，在流媒體直播和點(diǎn)播應(yīng)用中取得了極大的成功。當(dāng)網(wǎng)絡(luò)變得很大時(shí)，常常會(huì)引入超級(jí)節(jié)點(diǎn)的概念，超級(jí)節(jié)點(diǎn)可以和任何一種以上結(jié)構(gòu)結(jié)合起來(lái)組成新的結(jié)構(gòu)。許多點(diǎn)對(duì)點(diǎn)網(wǎng)絡(luò)一直受到懷有各種目的的人的持續(xù)攻擊。南京國(guó)內(nèi)點(diǎn)對(duì)點(diǎn)軟件</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京國(guó)內(nèi)點(diǎn)對(duì)點(diǎn)軟件,點(diǎn)對(duì)點(diǎn)" src="https://tyunfile.71360.com/UploadFile/decentral/637343774820546875/7716020.png"></div><p style="text-indent:25px">當(dāng)建立一個(gè)或多個(gè)連接后，節(jié)點(diǎn)將一條包含自身IP地址消息發(fā)送給其相鄰節(jié)點(diǎn)。相鄰節(jié)點(diǎn)再將此消息依次轉(zhuǎn)發(fā)給它們各自的相鄰節(jié)點(diǎn)，從而保證節(jié)點(diǎn)信息被多個(gè)節(jié)點(diǎn)所接收、保證連接更穩(wěn)定。新接入的節(jié)點(diǎn)可以向它的相鄰節(jié)點(diǎn)發(fā)送獲取地址getaddr消息，要求它們返回其已知對(duì)等節(jié)點(diǎn)的IP地址列表。節(jié)點(diǎn)可以找到需連接到的對(duì)等，節(jié)點(diǎn)在節(jié)點(diǎn)啟動(dòng)時(shí)，可以給節(jié)點(diǎn)指定一個(gè)正活躍節(jié)點(diǎn)IP,如果沒(méi)有，客戶端也維持一個(gè)列表，列出了那些長(zhǎng)期穩(wěn)定運(yùn)行的節(jié)點(diǎn)。這樣的節(jié)點(diǎn)也被稱為種子節(jié)點(diǎn)（其實(shí)和下載的種子文件道理是一樣的），就可以通過(guò)種子節(jié)點(diǎn)來(lái)快速發(fā)現(xiàn)網(wǎng)絡(luò)中的其他節(jié)點(diǎn)。南京國(guó)內(nèi)點(diǎn)對(duì)點(diǎn)軟件點(diǎn)對(duì)點(diǎn)技術(shù)又稱對(duì)等式網(wǎng)絡(luò)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京國(guó)內(nèi)點(diǎn)對(duì)點(diǎn)軟件,點(diǎn)對(duì)點(diǎn)" src="https://tyunfile.71360.com/UploadFile/decentral/637343774766210937/4970098.png"></div><p style="text-indent:25px">點(diǎn)對(duì)點(diǎn)，即對(duì)等計(jì)算機(jī)網(wǎng)絡(luò)，是一種在對(duì)等者（Peer）之間分配任務(wù)和工作負(fù)載的分布式應(yīng)用架構(gòu)，是對(duì)等計(jì)算模型在應(yīng)用層形成的一種組網(wǎng)或網(wǎng)絡(luò)形式?！癙eer”在英語(yǔ)里有“對(duì)等者、伙伴、對(duì)端”的意義。因此，從字面上，P2P可以理解為對(duì)等計(jì)算或點(diǎn)對(duì)點(diǎn)。國(guó)內(nèi)一些媒體將P2P翻譯成“點(diǎn)對(duì)點(diǎn)”或者“端對(duì)端”，學(xué)術(shù)界則統(tǒng)一稱為點(diǎn)對(duì)點(diǎn)（Peer-to-peer networking）或?qū)Φ扔?jì)算（Peer-to-peer computing），其可以定義為：網(wǎng)絡(luò)的參與者共享他們所擁有的一部分硬件資源（處理能力、存儲(chǔ)能力、網(wǎng)絡(luò)連接能力、打印機(jī)等），這些共享資源通過(guò)網(wǎng)絡(luò)提供服務(wù)和內(nèi)容，能被其它對(duì)等節(jié)點(diǎn)（Peer）直接訪問(wèn)而無(wú)需經(jīng)過(guò)中間實(shí)體。在此網(wǎng)絡(luò)中的參與者既是資源、服務(wù)和內(nèi)容的提供者（Server），又是資源、服務(wù)和內(nèi)容的獲取者（Client）。</p><p style="text-indent:25px">在P2P協(xié)同計(jì)算方面，國(guó)內(nèi)企業(yè)起步較晚。相關(guān)產(chǎn)品還不是很多，而國(guó)外例如Groove在這方面已經(jīng)作了大量的工作，開(kāi)發(fā)了相對(duì)成熟的產(chǎn)品。隨著協(xié)同計(jì)算概念的興起，這方面軟件的需求呈現(xiàn)急劇增長(zhǎng)的趨勢(shì)，應(yīng)該是一片廣闊的籃海。而且，這類軟件往往是面向企業(yè)和相關(guān)部門(mén)用戶，所以相對(duì)于**的P2P文件共享軟件來(lái)說(shuō)，有更好的盈利空間。在P2P的流媒體技術(shù)方面，目前，流媒體傳輸?shù)难芯坎艅偲鸩讲痪?，還有許多問(wèn)題需要解決。由于P2P流媒體系統(tǒng)中節(jié)點(diǎn)的行為具有Ad-Hoc性質(zhì)，如何在動(dòng)態(tài)的系統(tǒng)環(huán)境下保證流媒體的服務(wù)質(zhì)量，需要結(jié)合流媒體對(duì)QoS的要求和網(wǎng)絡(luò)流量分析等方面的知識(shí)，研究高效率、低代價(jià)的QoS保障機(jī)制。可研究的方向包括：服務(wù)節(jié)點(diǎn)的選擇、節(jié)點(diǎn)失效時(shí)如何保證流媒體服務(wù)的連續(xù)以及對(duì)多個(gè)發(fā)送端的傳輸調(diào)度等。點(diǎn)對(duì)點(diǎn)模式每個(gè)節(jié)點(diǎn)即是服務(wù)端又是客戶端。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京國(guó)內(nèi)點(diǎn)對(duì)點(diǎn)軟件,點(diǎn)對(duì)點(diǎn)" src="https://tyunfile.71360.com/UploadFile/decentral/637343774367187500/2610354.png"></div><p style="text-indent:25px">P2P網(wǎng)絡(luò)有3種比較的組織結(jié)構(gòu)，被應(yīng)用在不同的P2P應(yīng)用中。DHT結(jié)構(gòu)：分布式哈希表(DHT)是一種功能強(qiáng)大的工具，它的提出引起了學(xué)術(shù)界一股研究DHT的熱潮。雖然DHT具有各種各樣的實(shí)現(xiàn)方式，但是具有共同的特征，即都是一個(gè)環(huán)行拓?fù)浣Y(jié)構(gòu)，在這個(gè)結(jié)構(gòu)里每個(gè)節(jié)點(diǎn)具有一個(gè)一的節(jié)點(diǎn)標(biāo)識(shí)(ID)，節(jié)點(diǎn)ID是一個(gè)128位的哈希值。每個(gè)節(jié)點(diǎn)都在路由表里保存了其他前驅(qū)、后繼節(jié)點(diǎn)的ID。通過(guò)這些路由信息，可以方便地找到其他節(jié)點(diǎn)。這種結(jié)構(gòu)多用于文件共享和作為底層結(jié)構(gòu)用于流媒體傳輸。點(diǎn)到點(diǎn)技術(shù)也被使用在類似VoIP等實(shí)時(shí)媒體業(yè)務(wù)的數(shù)據(jù)通信中。南京國(guó)內(nèi)點(diǎn)對(duì)點(diǎn)軟件</p><p style="text-indent:25px">資源和服務(wù)包括:信息的共享和交換、計(jì)算資源(如CPU的共享)、存儲(chǔ)共享(如緩存和磁盤(pán)空間的使用)等。南京國(guó)內(nèi)點(diǎn)對(duì)點(diǎn)軟件</p><p style="text-indent:25px">共享包含各種格式音頻，視頻，數(shù)據(jù)等的文件是非常普遍的，實(shí)時(shí)數(shù)據(jù)（如IP電話通信、Anychat音視頻）也可以使用點(diǎn)對(duì)點(diǎn)技術(shù)來(lái)傳送。限定條件：運(yùn)用內(nèi)存來(lái)管理交換資料，大幅度提高性能；適用于小規(guī)模的網(wǎng)路，維護(hù)容易；不用投資大量金錢在服務(wù)器的軟，硬體設(shè)備；有些網(wǎng)絡(luò)和通信渠道，像Napster，OpenNAP，和IRC@find,一方面使用了C/S結(jié)構(gòu)來(lái)處理一些任務(wù)（如搜索功能），另一方面又同時(shí)使用點(diǎn)對(duì)點(diǎn)結(jié)構(gòu)來(lái)處理其他任務(wù)。而有些網(wǎng)絡(luò)，如Gnutella和Freenet，使用點(diǎn)對(duì)點(diǎn)結(jié)構(gòu)來(lái)處理所有的任務(wù)，有時(shí)被認(rèn)為是真正的點(diǎn)對(duì)點(diǎn)網(wǎng)絡(luò)。盡管Gnutella也使用了目錄服務(wù)器來(lái)方便節(jié)點(diǎn)得到其它節(jié)點(diǎn)的網(wǎng)絡(luò)地址。南京國(guó)內(nèi)點(diǎn)對(duì)點(diǎn)軟件</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3116680.html</p></div></div></div></div></div><div id="h8rd7jl" class="page-right twoColRt"><div id="jtv29wy" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="xhjqxjg" class="recomPic likePro"><a 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