?? gnutella協(xié)議中文版.htm
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<span lang="EN-US" style="font-size: 14pt"><b>Gnutella</b></span><b><span style="font-size: 14pt; font-family: 宋體">協(xié)議中文版</span></b></p>
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<b><span style="font-size: 14pt; font-family: 宋體">翻譯人：梁宏恩</span><span style="font-size: 14pt">
<span lang="EN-US"><a href="mailto:chinap2p@163.com">chinap2p@163.com</a></span></span></b></p>
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<font size="3"><span lang="EN-US">Gnutella2</span><span style="font-family: 宋體">是一份關(guān)于發(fā)布檢索的協(xié)議。雖然</span><span lang="EN-US">Gnutella</span><span style="font-family: 宋體">協(xié)議也支持傳統(tǒng)的客戶端</span><span lang="EN-US">/</span><span style="font-family: 宋體">中心服務(wù)器的檢索規(guī)范，但</span><span lang="EN-US">Gnutella</span><span style="font-family: 宋體">協(xié)議更主要是支持點(diǎn)對點(diǎn)的，沒有中心的檢索。在這個模型中，所有的客戶端也是一個服務(wù)器，同樣反之亦然。這些所謂的</span><span lang="EN-US">Gnutella</span><span style="font-family: 宋體">客戶機(jī)正常情況下執(zhí)行聯(lián)系服務(wù)器和客戶端的任務(wù)。他們提供客戶端的接口使用戶可以發(fā)出查詢請求和看檢索結(jié)果。同事他們也接收來自其它客戶機(jī)的請求，檢查他們自己的數(shù)據(jù)中匹配的部分，返回可用的結(jié)果。因?yàn)榫哂刑烊坏姆植夹裕粋€執(zhí)行</span><span lang="EN-US">Gnutella</span><span style="font-family: 宋體">協(xié)議的網(wǎng)絡(luò)是具有高度容錯的，比如當(dāng)部分客戶機(jī)離線，網(wǎng)絡(luò)服務(wù)不會被中斷。</span></font></p>
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<b><span style="font-size: 12pt; font-family: 宋體">協(xié)議定義</span></b></p>
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<font size="3"><span lang="EN-US">Gnutella</span><span style="font-family: 宋體">協(xié)議定義客戶機(jī)通過網(wǎng)絡(luò)通訊的方式。其中包括定義了通過客戶機(jī)進(jìn)行數(shù)據(jù)通訊的描述符號集和內(nèi)部客戶機(jī)相互交互的一些規(guī)則。以下是定義的內(nèi)容：</span></font></p>
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<b><font size="3"><span style="font-family: 宋體">描述定義</span></font></b></p>
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<span style="font-size: 9pt; line-height: 150%; font-family: 宋體">指令</span></td>
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<span style="font-size: 9pt; line-height: 150%; font-family: 宋體">說明</span></td>
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<font face="Arial">Ping</font></span><span style="font-size: 9pt; line-height: 150%; font-family: 宋體">指令</span></td>
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用于激活發(fā)現(xiàn)網(wǎng)絡(luò)上的客戶機(jī)。一個客戶機(jī)收到一個</span><span lang="EN-US" style="font-size: 9pt; line-height: 150%"><font face="Arial">Ping</font></span><span style="font-size: 9pt; line-height: 150%; font-family: 宋體">的描述符表示希望回應(yīng)一個或多個</span><span lang="EN-US" style="font-size: 9pt; line-height: 150%"><font face="Arial">Pong</font></span><span style="font-size: 9pt; line-height: 150%; font-family: 宋體">描述符。</span></td>
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<font face="Arial">Pong</font></span><span style="font-size: 9pt; line-height: 150%; font-family: 宋體">指令</span></td>
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<span style="font-size: 9pt; line-height: 150%; font-family: 宋體">用于回應(yīng)</span><span lang="EN-US" style="font-size: 9pt; line-height: 150%"><font face="Arial">Ping</font></span><span style="font-size: 9pt; line-height: 150%; font-family: 宋體">。包括一個被連接的</span><span lang="EN-US" style="font-size: 9pt; line-height: 150%"><font face="Arial">Gnutella</font></span><span style="font-size: 9pt; line-height: 150%; font-family: 宋體">客戶機(jī)的地址和他能提供的數(shù)據(jù)供共享的信息。</span></td>
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<font face="Arial">Query</font></span><span style="font-size: 9pt; line-height: 150%; font-family: 宋體">指令</span></td>
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首要的分布式網(wǎng)絡(luò)檢索機(jī)制。一個客戶機(jī)收到一個</span><span lang="EN-US" style="font-size: 9pt; line-height: 150%"><font face="Arial">Query</font></span><span style="font-size: 9pt; line-height: 150%; font-family: 宋體">描述符后，如果在自己的數(shù)據(jù)集中發(fā)現(xiàn)一個匹配的數(shù)據(jù)將回應(yīng)一個</span><span lang="EN-US" style="font-size: 9pt; line-height: 150%"><font face="Arial">QueryHit</font></span><span style="font-size: 9pt; line-height: 150%; font-family: 宋體">。</span></td>
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<font face="Arial">QueryHit</font></span><span style="font-size: 9pt; line-height: 150%; font-family: 宋體">指令</span></td>
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<span style="font-size: 9pt; line-height: 150%; font-family: 宋體">用于回應(yīng)</span><span lang="EN-US" style="font-size: 9pt; line-height: 150%"><font face="Arial">Query</font></span><span style="font-size: 9pt; line-height: 150%; font-family: 宋體">。這個描述符提供足夠的信息來獲取匹配</span><span lang="EN-US" style="font-size: 9pt; line-height: 150%"><font face="Arial">Query</font></span><span style="font-size: 9pt; line-height: 150%; font-family: 宋體">請求的數(shù)據(jù)。</span></td>
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<font face="Arial">Push</font></span><span style="font-size: 9pt; line-height: 150%; font-family: 宋體">指令</span></td>
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一個用于允許防火墻中的客戶端向網(wǎng)絡(luò)提供基于文件的數(shù)據(jù)文件的機(jī)制。</span></td>
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