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<h1>星型拓?fù)?/h1> <div id="fpyurgl" class="ar_title_b"> <div id="f43gvag" class="sub_title clear"> <span id="ulg38x2" class="sp2 c6 fl">時(shí)間：<time class="fxtime">2016-03-14 14:14:47</time></span> <span id="zqz2wn9" class="sp1 c6 fl"><em id="zuozhe" class="noshow">林少</em><em class="user_id noshow">742</em>由 <em class="nickname"></em> 分享</span> <span id="a88pewb" class="fl arc_btn"></span> </div> </div> </div> <div id="9vvj2um" class="y_ju"></div> <div id="sawpcqy" class="con_article con_main" id="contentText"> <p> 之前有說過拓?fù)涑Ｒ婎愋?，今天我們便來講講星型拓?fù)洌蔷钟蚓W(wǎng)中最常用的一種拓?fù)浣Y(jié)構(gòu)，主要星型拓?fù)浣Y(jié)構(gòu)簡單，網(wǎng)絡(luò)延遲時(shí)間較小，傳輸誤差低擴(kuò)展性比較強(qiáng)，當(dāng)然，它也存在一些缺點(diǎn)，接下來讓我們來了解下吧</p><p> 星型拓?fù)?/p><p><span style="font-stretch: normal;"></span>星形拓?fù)涫怯芍醒牍?jié)點(diǎn)和通過點(diǎn)到點(diǎn)通信鏈路接到中央節(jié)點(diǎn)的各個(gè)站點(diǎn)組成。中央節(jié)點(diǎn)執(zhí)行集中式通信控制策略,因此中央節(jié)點(diǎn)相當(dāng)復(fù)雜,而各個(gè)站點(diǎn)的通信處理負(fù)擔(dān)都很小。星形網(wǎng)采用的交換方式有電路交換和報(bào)文交換,尤以電路交換更為普遍。這種結(jié)構(gòu)一旦建立了通道連接,就可以無延遲地在連通的兩個(gè)站點(diǎn)之間傳送數(shù)據(jù)。目前流行的專用交換機(jī)PBX (Private Branch exchange)就是星形拓?fù)浣Y(jié)構(gòu)的典型實(shí)例。</p><p> 星型拓?fù)浣Y(jié)構(gòu)的優(yōu)點(diǎn)</p><p><span style="font-stretch: normal;"></span>(1)結(jié)構(gòu)簡單，連接方便，管理和維護(hù)都相對(duì)容易，而且擴(kuò)展性強(qiáng)。</p><p><span style="font-stretch: normal;"></span>(2)網(wǎng)絡(luò)延遲時(shí)間較小，傳輸誤差低。</p><p><span style="font-stretch: normal;"></span>(3)在同一網(wǎng)段內(nèi)支持多種傳輸介質(zhì)，除非中心結(jié)點(diǎn)故障，否則網(wǎng)絡(luò)不會(huì)輕易癱瘓。因此，星型網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)是目前應(yīng)用最廣泛的一種網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)。</p><p> 星型拓?fù)浣Y(jié)構(gòu)的缺點(diǎn)</p><p><span style="font-stretch: normal;"></span>(1)安裝和維護(hù)的費(fèi)用較高</p><p><span style="font-stretch: normal;"></span>(2)共享資源的能力較差</p><p><span style="font-stretch: normal;"></span>(3)通信線路利用率不高(4)對(duì)中心結(jié)點(diǎn)要求相當(dāng)高，一旦中心結(jié)點(diǎn)出現(xiàn)故障，則整個(gè)網(wǎng)絡(luò)將癱瘓。</p><p> 星形拓?fù)浣Y(jié)構(gòu)廣泛應(yīng)用于網(wǎng)絡(luò)的智能集中于中央節(jié)點(diǎn)的場合。從目前的趨勢看,計(jì)算機(jī)的發(fā)展已從集中的主機(jī)系統(tǒng)發(fā)展到大量功能很強(qiáng)的微型機(jī)和工作站,在這種形勢下,傳統(tǒng)的星形拓?fù)涞氖褂脮?huì)有所減少。</p> </div> <div id="qc8ghvy" class="y_ju"></div> <div id="4wjchyn" class="pnum"> <ul id="page_slice"> <div id="vdu9bsp" class="clear"></div> </ul> </div> <a href="/lhdoc/index.html?url=//lpo831.com/diannao/wangluo/jichu/535273.html" class="download_word download_word_lb" title="文檔下載" target="_blank"> <div id="ba9j3ax" class="download_card"> <div id="fviawfu" class="card_nr card_nr_lb"> <h4 class="card_bt">星型拓?fù)?/h4> <div id="tb8b3qj" class="download_card_msg">之前有說過拓?fù)涑Ｒ婎愋停裉煳覀儽銇碇v講星型拓?fù)洌肓私獾呐笥褎e錯(cuò)過哦! 星型拓?fù)?星形拓?fù)涫怯芍醒牍?jié)點(diǎn)和通過點(diǎn)到點(diǎn)通信鏈路接到中央節(jié)點(diǎn)的各個(gè)站點(diǎn)組成。中央節(jié)點(diǎn)執(zhí)行集中式通信控制策略,因此中央節(jié)點(diǎn)相當(dāng)復(fù)雜,而各個(gè)站點(diǎn)的通信處</div> </div> <div id="3jjxlbl" class="download_card_btn download_card_btn_lb"> <div id="8miaesx" class="content_box_tj"> <span>推薦度：</span> <img src="http://lhpay.gzcl999.com/static/doc/images/pc/icon_star.png" alt=""> <img src="http://lhpay.gzcl999.com/static/doc/images/pc/icon_star.png" alt=""> <img src="http://lhpay.gzcl999.com/static/doc/images/pc/icon_star.png" alt=""> <img src="http://lhpay.gzcl999.com/static/doc/images/pc/icon_star.png" alt=""> <img src="http://lhpay.gzcl999.com/static/doc/images/pc/icon_star.png" alt=""> </div> <div id="u2q8odk" class="downlod_btn_right demo_tc downlod_btn_right_lb"> <em class="downlod_icon"></em>點(diǎn)擊下載文檔<span>文檔為doc格式</span></div> </div> </div> </a>  </article>  <div id="em3s2wk" class="list_hot ar_related bj_mt20 louti"> <h4 class="title2 title2_te">相關(guān)文章</h4> <ul 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