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之前有說過拓?fù)涑Ｒ婎愋?，今天我們便來講講星型拓?fù)?，它是局域網(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)延遲時間較小，傳輸誤差低擴(kuò)展性比較強，當(dāng)然，它也存在一些缺點，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)點和通過點到點通信鏈路接到中央節(jié)點的各個站點組成。中央節(jié)點執(zhí)行集中式通信控制策略,因此中央節(jié)點相當(dāng)復(fù)雜,而各個站點的通信處理負(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站點之間傳送數(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)的典型實例。</p><p> 星型拓?fù)浣Y(jié)構(gòu)的優(yōu)點</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)都相對容易，而且擴(kuò)展性強。</p><p><span style="font-stretch: normal;"></span>(2)網(wǎng)絡(luò)延遲時間較小，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)點故障，否則網(wǎng)絡(luò)不會輕易癱瘓。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</p><p><span style="font-stretch: normal;"></span>(1)安裝和維護(hù)的費用較高</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)對中心結(jié)點要求相當(dāng)高，一旦中心結(jié)點出現(xiàn)故障，則整個網(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)點的場合。從目前的趨勢看,計算機(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兴鶞p少。</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> <a href="/lhdoc/index.html?url=//www.rzpgrj.com/diannao/wangluo/jichu/535273.html" class="download_word download_word_lb" title="文檔下載" target="_blank"> <div id="tmyyfroktkho" class="download_card"> <div id="tmyyfroktkho" class="card_nr card_nr_lb"> <h4 class="card_bt">星型拓?fù)?/h4> <div id="tmyyfroktkho" class="download_card_msg">之前有說過拓?fù)涑Ｒ婎愋?，今天我們便來講講星型拓?fù)?，想了解的朋友別錯過哦! 星型拓?fù)?星形拓?fù)涫怯芍醒牍?jié)點和通過點到點通信鏈路接到中央節(jié)點的各個站點組成。中央節(jié)點執(zhí)行集中式通信控制策略,因此中央節(jié)點相當(dāng)復(fù)雜,而各個站點的通信處</div> </div> <div id="tmyyfroktkho" class="download_card_btn download_card_btn_lb"> <div id="tmyyfroktkho" 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="tmyyfroktkho" class="downlod_btn_right demo_tc downlod_btn_right_lb"> <em class="downlod_icon"></em>點擊下載文檔<span>文檔為doc格式</span></div> </div> </div> </a>  </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" 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