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class="ar_con_nr"> <div id="tmyyfroktkho" class="con_l fl"> <article class="ar_con bg louti"> <div id="tmyyfroktkho" class="ar_title"> <h1>樹型拓?fù)渑c混合型拓?fù)?/h1> <div id="tmyyfroktkho" class="ar_title_b"> <div id="tmyyfroktkho" class="sub_title clear"> <span id="tmyyfroktkho" class="sp2 c6 fl">時(shí)間：<time class="fxtime">2016-03-14 14:28:59</time></span> <span id="tmyyfroktkho" 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="tmyyfroktkho" class="fl arc_btn"></span> </div> </div> </div> <div id="tmyyfroktkho" class="y_ju"><script type="text/javascript">a("title");</script></div> <div id="tmyyfroktkho" class="con_article con_main" id="contentText"> <p>樹型拓?fù)渑c混合型拓?fù)?/p><p> 　　由于樹型拓?fù)浜突旌闲屯負(fù)涓暗耐負(fù)浣Y(jié)構(gòu)類型有類似，今天我們在這里一起總結(jié)了，樹型結(jié)構(gòu)易于擴(kuò)展，故障隔離比較簡單，但對(duì)結(jié)點(diǎn)依賴性太大，一發(fā)生故障則全網(wǎng)不能工作，從這一點(diǎn)來看,樹形拓?fù)浣Y(jié)構(gòu)的可靠性有點(diǎn)類似于星形拓?fù)浣Y(jié)構(gòu)。混合型跟樹型結(jié)構(gòu)一樣易于擴(kuò)展，故障診斷和隔離比較方便，但是跟星型拓?fù)湟粯?，擴(kuò)展安裝線纜太長，下面便是知識(shí)點(diǎn)，謝謝朋友們觀看</p><p> 　　樹型拓?fù)涞膬?yōu)點(diǎn)<br/></p><p> 　　(1)易于擴(kuò)展。這種結(jié)構(gòu)可以延伸出很多分支和子分支,這些新節(jié)點(diǎn)和新分支都能容易地加入網(wǎng)內(nèi)。</p><p> 　　(2)故障隔離較容易。如果某一分支的節(jié)點(diǎn)或線路發(fā)生故障,很容易將故障分支與整個(gè)系統(tǒng)隔離開來。樹形拓?fù)涞娜秉c(diǎn)各個(gè)節(jié)點(diǎn)對(duì)根的依賴性太大,如果根發(fā)生故障,則全網(wǎng)不能正常工作?；旌闲瓮?fù)?/p><p> 　　混合型結(jié)構(gòu)將以上某兩種單一拓?fù)浣Y(jié)構(gòu)混合起來,取兩者的優(yōu)點(diǎn)構(gòu)成的拓?fù)浞Q為混合形拓?fù)浣Y(jié)構(gòu)。一種是星形拓?fù)浜铜h(huán)形拓?fù)浠旌铣傻?quot;星一環(huán)"拓?fù)?另一種是星形。拓?fù)浜涂偩€拓?fù)浠旌铣傻?quot;星一總"拓?fù)洹Ｆ鋵?shí),這兩種混合形在結(jié)構(gòu)上有相似之處,若將總線結(jié)構(gòu)的兩個(gè)端點(diǎn)連在一起也就成了環(huán)形結(jié)構(gòu)。這種拓?fù)涞呐渲檬怯梢慌尤氕h(huán)中或總線的集中器組成,由集中器再按星形結(jié)構(gòu)連至每個(gè)用戶站。<br/></p><p> 　　混合形拓?fù)涞膬?yōu)點(diǎn)</p><p> 　　(1)故障診斷和隔離較為方便。一旦網(wǎng)絡(luò)發(fā)生故障,只要診斷出哪個(gè)集中器有故障,將該集中器和全網(wǎng)隔離即可。</p><p> 　　(2)易于擴(kuò)展。要擴(kuò)展用戶時(shí),可以加入新的集中器,也可在設(shè)計(jì)時(shí),在每個(gè)集中器留出一些備用的可插入新的站點(diǎn)的連接口。</p><p> 　　(3)安裝方便。網(wǎng)絡(luò)的主電纜只要連通這些集中器,這種安裝和傳統(tǒng)的電話系統(tǒng)電纜安裝很相似。</p><p> 　　混合形拓?fù)涞娜秉c(diǎn)</p><p> 　　(1)需要選用帶智能的集中器。這是為了實(shí)現(xiàn)網(wǎng)絡(luò)故障自動(dòng)診斷和故障節(jié)點(diǎn)的隔離所必需的。</p><p> 　　(2)像星形拓?fù)浣Y(jié)構(gòu)一樣,集中器到各個(gè)站點(diǎn)的電纜安裝長度會(huì)增加。</p> </div> <div id="tmyyfroktkho" class="y_ju"><script type="text/javascript">a("conten");</script></div> <div id="tmyyfroktkho" class="pnum"> <ul id="page_slice"> <div id="tmyyfroktkho" class="clear"></div> </ul> </div> </article> <div id="tmyyfroktkho" class="list_hot ar_related bj_mt20 louti"> <h4 class="title2 title2_te">相關(guān)文章</h4> <ul class="bj_mt20"> <li id="tmyyfroktkho" class="lb_3 chao"> <time>03-22</time> <a href="http://www.rzpgrj.com/diannao/wps/wenzi/2900669.html" title="wps文字橫向樹型圖怎樣設(shè)置" 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