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GMT</pubDate><guid>http://www.shnenglu.com/huangjianfu/archive/2009/06/10/87333.html</guid><wfw:comment>http://www.shnenglu.com/huangjianfu/comments/87333.html</wfw:comment><comments>http://www.shnenglu.com/huangjianfu/archive/2009/06/10/87333.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/huangjianfu/comments/commentRss/87333.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/huangjianfu/services/trackbacks/87333.html</trackback:ping><description><![CDATA[淇℃伅瀹夊叏娑夊強鍒頒俊鎭殑淇濆瘑鎬э紙Confidentiality錛夈佸畬鏁存э紙Integrity錛夈佸彲鐢ㄦэ紙Availability錛夈佸彲鎺фэ紙Controllability錛夊拰涓嶅彲鍚﹁鎬э紙Non-Repudiation錛夈傜患鍚堣搗鏉ヨ,灝辨槸瑕佷繚闅滅數瀛愪俊鎭殑鏈夋晥鎬с備繚瀵嗘у氨鏄鎶楀鎵嬬殑琚姩鏀誨嚮,淇濊瘉淇℃伅涓嶆硠婕忕粰鏈粡鎺堟潈鐨勪漢銆傚畬鏁存у氨鏄鎶楀鎵嬩富鍔ㄦ敾鍑?闃叉淇℃伅琚湭緇忔巿鏉冪殑浜虹鏀廣傚彲鐢ㄦу氨鏄繚璇佷俊鎭強淇℃伅緋葷粺紜疄涓烘巿鏉冧嬌鐢ㄨ呮墍鐢ㄣ傚彲鎺фу氨鏄淇℃伅鍙婁俊鎭郴緇熷疄鏂藉畨鍏ㄧ洃鎺с? <img src ="http://www.shnenglu.com/huangjianfu/aggbug/87333.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" 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>http://www.cnpaf.net/Class/Ethernet/200408/402.html</a>錛屼腑鍥藉崗璁垎鏋愮綉<br><br>姝e鍏跺悕瀛楁墍鏆楃ず鐨勶紝Hub灝辨槸媧誨姩鐨勪腑蹇冦傜敤緗戠粶鏈鏉ヨ錛孒ub鎴?Concentrator錛屾槸鍩轟簬鏄熷艦鎷撴墤鐨勬帴綰跨偣銆侫rcnet銆?0Base-T銆?0Base-F鍙婅澶氬叾瀹冧笓鐢ㄧ綉緇滈兘渚濋潬闆嗙嚎鍣ㄦ潵榪炴帴鍚勬鐢電紗鍙婃妸鏁版嵁鍒嗗彂鍒板悇涓綉孌點傞泦綰垮櫒鐨勫熀鏈姛鑳芥槸淇℃伅鍒嗗彂錛屽畠鎶婁竴涓鍙f帴鏀剁殑鎵鏈変俊鍙峰悜鎵鏈夌鍙e垎鍙戝嚭鍘匯備竴浜涢泦綰垮櫒鍦ㄥ垎鍙戜箣鍓嶅皢寮變俊鍙烽噸鏂扮敓鎴愶紝涓浜涢泦綰垮櫒鏁寸悊淇″彿鐨勬椂搴忎互鎻愪緵鎵鏈夌鍙i棿鐨勫悓姝ユ暟鎹氫俊銆傚叿鏈夊涓?0Base-F鎺ュ彛鐨勯泦綰垮櫒灝辮薄鏄嬌鐢ㄩ暅瀛愭潵鎶婂厜綰垮垎鍒板悇涓鍙c?br><br>鍥?鏄熀鏈殑10Base-2緗戠粶錛屾敞鎰忔満鍣ㄩ棿榪炴帴鐨勬柟寮忓拰鏁版嵁鍦ㄦ簮璁懼鍜岀洰鐨勮澶囬棿鐨勫悇涓澶囩殑澶勭悊鍙婁紶閫掋?br> <p align=center><img src="http://www.cnpaf.net/article/Files/RoUpimages/0183618605.jpg" border=0></p> <br><br><br>鍥?鏄笌鍥?鐩稿悓鐨勭綉緇滐紝涓嶈繃鏄?0Base-T錛屽彲浠ョ湅鍒版嫇鎵戠殑涓嶅悓鍜岄泦綰垮櫒鏄浣曞祵鍒版緗戜腑銆?br> <p align=center><img src="http://www.cnpaf.net/article/Files/RoUpimages/0183623853.jpg" border=0></p> <br><br><br>鍦?10Base-T緗戠粶涓紝鎵鏈夎澶囬渶瑕佺敤闈炲睆钄藉弻緇炵嚎榪炴帴鍒頒竴涓垨澶氫釜闆嗙嚎鍣紝闆嗙嚎鍣ㄥ簲璇ユ湁澶氫釜绔彛鐢氳嚦澶氱綾誨瀷鐨勭鍙c傛湁鏃墮渶瑕佹妸澶氫釜闆嗙嚎鍣ㄨ繛鎺ヨ搗鏉ワ紝榪欐椂錛屼綘鍙兘鎯崇敤楂橀熺鍙f潵寤虹珛緗戠粶鐨勪富騫詫紝鍚勯泦綰垮櫒涓庢湇鍔″櫒搴旂洿鎺ヨ繛鍒伴珮閫熶富騫蹭笂銆傚洜涓哄鏁癓AN鐨勪富瑕侀氫俊鏄湪宸ヤ綔绔欏拰涓繪湇鍔″櫒涔嬮棿鐨勶紝涓誨共瀵圭綉緇滅殑鏁翠綋鎬ц兘鎰忎箟閲嶅ぇ銆?br><br>鍥?鏄釜杈冨鏉傜殑10Base-T緗戠粶紺烘剰鍥撅紝娉ㄦ剰涓誨共鏄庢牱榪炴帴澶氫釜闆嗙嚎鍣ㄥ拰鏈嶅姟鍣ㄧ殑銆備富騫插簲璇ユ槸楂橀熻繛鎺ワ紝濡傚揩閫熶互澶綉鎴朏DDI絳夈?br><br> <p align=center><img src="http://www.cnpaf.net/article/Files/RoUpimages/0183630217.jpg" border=0></p> <br><br>浠ょ墝鐜綉涓篃鏈夊彲浠ョО浣滈泦綰垮櫒鐨勮澶囷紝MSAU(Multi-StationAccessUnit)灝卞彲浠ョ湅浣滀竴縐嶉泦綰垮櫒錛屽洜涓哄畠鐨勫姛鑳戒笌浠ュお緗戠殑闆嗙嚎鍣ㄥ緢綾諱技錛屼絾鏄疢SAU鎶婂寘涓茶鍦拌礬鐢卞埌鍚勪釜璁懼錛屼笉璞′互澶綉闆嗙嚎鍣ㄦ槸騫惰鐨勩備負浜嗕笉鍙戠敓娣鋒穯錛屼護鐗岀幆緗慚SAU涓嶄綔涓洪泦綰垮櫒璁ㄨ銆?br>銆<br><br>浜屻佽皝闇瑕侀泦綰垮櫒錛?br><br><br>鍒ゆ柇浣犵殑灞鍩熺綉鏄惁闇瑕侀泦綰垮櫒鐨勬柟娉曞緢綆鍗曪細濡傛灉浣犳兂寤虹珛鏄熷艦緗戠粶涓旀湁涓嶅皯浜庝袱鍙頒富鏈猴紝閭d箞灝遍渶瑕侀泦綰垮櫒銆傝繖涓鍒欏彧鏈変竴涓緥澶栵紝閭e氨鏄彧鏈変袱鍙頒富鏈虹殑 10Base-T緗戠粶錛屽彲浠ョ洿鎺ュ皢涔嬬浉榪烇紝浣嗘槸闇瑕佷竴鏉$壒孌婂彂閫佺涓庢帴鏀剁浜ゅ弶榪炴帴鐨勭嚎緙嗭紝榪欑綰跨紗寰堟櫘閫氾紝濡傛灉浣犲疄鍦ㄦ壘涓嶅埌錛屼篃鍙互鑷繁鍋氫竴涓紝寰堝鏄撲篃寰堜究瀹滐紝鎵闇鐗╁搧涓轟竴灝忔鍙岀粸綰褲佷袱涓猂J-45鎺ュご鍜屽伐鍏鳳紝鎸夌収涓嬭〃榪炴帴灝辨槸浜嗐?br><br>銆<br><br>RJ-45鎺ュご1銆RJ-45鎺ュご2<br>閽堝彿鍔熻兘銆閽堝彿鍔熻兘<br>1鍙戦?<-->3鎺ユ敹+<br>2鍙戦?<-->6鎺ユ敹-<br>3鎺ユ敹+<-->1鍙戦?<br>6鎺ユ敹-<-->2鍙戦?<br><br><br>涓夈侀泦綰垮櫒鐨勭被鍨?br><br><br>鎴戜滑鐭ラ亾錛岄泦綰垮櫒鍦ㄦ槦褰㈡嫇鎵戠殑緗戠粶涓搗鐫閲嶈浣滅敤銆傞泦綰垮櫒鏈夊縐嶏紝鍚勪釜縐嶇被鍏鋒湁鐗瑰畾鐨勫姛鑳姐佹彁渚涗笉鍚岀瓑綰х殑鏈嶅姟銆備笅闈㈣璁插鏁伴泦綰垮櫒鐨勪竴浜涙爣鍑嗙壒鎬у拰琚姩銆佷富鍔ㄣ佹櫤鑳介泦綰垮櫒鐨勫尯鍒互鍙婁竴浜涢珮鎬ц兘闆嗙嚎鍣ㄧ殑闄勫姞鐗規с?br><br>1銆佸熀鏈鑼?br><br><br>鎵鏈夌殑闆嗙嚎鍣ㄦ牴鎹彲榪炴帴鐨勭嚎緙嗙被鍨嬮兘鏈変竴浜涘熀鏈壒鎬с傞泦綰垮櫒鍙互緇欑綉緇滄彁渚涢櫎鎺ュ彛涔嬪鐨勯檮鍔犳湇鍔★紝浣嗕篃蹇呴』閬典粠IEEE瀵逛粙璐ㄧ殑瑙勫畾銆?br><br>澶氭暟闆嗙嚎鍣ㄤ富瑕佺殑榪炴帴鏄疪J-45鎻掑駭錛岃繖鏄熀浜庡弻緇炵嚎鐨勫縐嶄互澶綉鐨勬爣鍑嗘帴澶寸被鍨嬶紝浠?0Base-T鍒?00Base-T錛屽眬鍩熺綉涓殑宸ヤ綔绔欍佹墦鍗版満絳夎澶囬氬父鏄互鏌愮鍙岀粸綰胯繛鎺ュ埌闆嗙嚎鍣ㄧ殑錛屽叾涓ょ涓篟J-45榪炴帴澶淬?br><br>娉細RJ-45澶寸湅璧鋒潵鏈夌偣璞$數璇濈嚎鐨勬帴澶達紝涓嶈繃紼嶅井瀹界偣銆傚畠涓昏鐢ㄤ簬浠ュお緗戯紝浣嗕篃鍙敤浜庝護鐗岀幆緗戙?br><br>姣忕綰跨紗鍒伴泦綰垮櫒鐨勯暱搴︾敱浣跨敤鐨勪粙璐ㄥ喅瀹氾紙瑙佷笅琛級銆?br><br>銆<br><br>浠ュお緗戠被鍨嬭窛紱?br>10Base-2185綾?br>10Base-5500綾?br>10Base-T100綾?br>10Base-F2鍏噷<br>10broad-363,600綾?br><br>涓婅堪鏄互澶綉瑙勮寖鐨勬渶澶ч暱搴︼紝鍏朵腑澶氭暟鍙互鐢ㄤ腑緇у櫒(repeater)鏉ュ歡闀褲傚綋鐒惰繕鏈夊叾浠栫殑瑕佹眰銆?br><br>闆嗙嚎鍣ㄦ槸鐢靛瓙璁懼錛屽洜姝ら渶瑕佺數婧愶紝澶氭暟闆嗙嚎鍣ㄨ繕鏈夋寚紺哄縐嶇姸鎬佺殑LED鎸囩ず鐏紝甯歌鐨勪袱縐嶆寚紺虹伅鏄數婧愬拰绔彛鐘舵佹寚紺虹伅錛屾湁鐨勯泦綰垮櫒榪樻湁鐩戣绔彛閫氫俊鐘舵佸拰鍐茬獊鐨勬寚紺虹伅銆?br><br>2銆佽鍔ㄩ泦綰垮櫒<br><br>欏懼悕鎬濅箟錛岃鍔ㄩ泦綰垮櫒鏄浉瀵歸潤姝㈢殑銆傚畠浠病鏈変笓闂ㄧ殑鍔ㄤ綔鏉ユ彁楂樼綉緇滄ц兘錛屼篃涓嶈兘甯綘媯嫻嬬‖浠墮敊璇垨鎬ц兘鐡墮錛屽畠浠彧鏄畝鍗曞湴浠庝竴涓鍙f帴鏀舵暟鎹茍閫氳繃鎵鏈夌鍙e垎鍙戯紝榪欐槸闆嗙嚎鍣ㄥ彲浠ュ仛鐨勬渶綆鍗曠殑浜嬫儏銆傝鍔ㄩ泦綰垮櫒鏄槦褰㈡嫇鎵戜互澶綉鐨勫叆闂ㄧ駭璁懼銆?br><br>琚姩闆嗙嚎鍣ㄩ氬父鏈変竴涓?0Base-2绔彛鍜屼竴浜汻J-45鎺ュご銆傛垜浠煡閬擄紝10Base-5鏄嬌鐢ㄧ矖緙嗙殑浠ュお緗戯紝榪欎釜10Base-2鎺ュご鍙互鐢ㄤ簬榪炴帴涓誨共銆傛湁浜涢泦綰垮櫒榪樻湁鍙繛鍒版敹鍙戝櫒鐨凙UI绔彛浠ュ緩绔嬩富騫層?br><br>3銆佷富鍔ㄩ泦綰垮櫒<br><br>涓誨姩闆嗙嚎鍣ㄦ嫢鏈夎鍔ㄩ泦綰垮櫒鐨勬墍鏈夋ц兘錛屾澶栬繕鑳界洃瑙嗘暟鎹傚畠浠槸鍦ㄤ互澶綉瀹炵幇瀛樿串杞彂鎶鏈殑閲嶈瑙掕壊錛屽畠浠湪杞彂涔嬪墠媯鏌ユ暟鎹紝瀹冧滑騫朵笉鍖哄垎浼樺厛嬈″簭錛岃屾槸綰犳鎹熷潖鐨勫垎緇勫茍璋冩暣鏃跺簭銆?br><br>濡傛灉淇″彿姣旇緝寮變絾浠嶇劧鍙錛屼富鍔ㄩ泦綰垮櫒鍦ㄨ漿鍙戝墠灝嗗叾鎭㈠鍒拌緝寮虹殑鐘舵併傝繖浣垮緱涓浜涙ц兘涓嶆槸鐗瑰埆鐞嗘兂鐨勮澶囦篃鍙甯鎬嬌鐢ㄣ傚鏋滄煇璁懼鍙戝嚭鐨勪俊鍙蜂笉澶熷己錛屼嬌寰楄鍔ㄩ泦綰垮櫒鏃犳硶璇嗗埆錛岄偅涔堜富鍔ㄩ泦綰垮櫒鐨勪俊鍙鋒斁澶у櫒鍙互浣胯璁懼緇х畫姝e父浣跨敤銆傛澶栵紝涓誨姩闆嗙嚎鍣ㄨ繕鍙互鎶ョ煡閭d簺璁懼澶辨晥錛屼粠鑰屾彁渚涗簡涓瀹氱殑璇婃柇鑳藉姏銆?br><br>鏈変簺綰跨紗鍙兘鏈夌數紓佸共鎵頒嬌鍒嗙粍涓嶈兘鎸夋甯告椂搴忓埌杈鵑泦綰垮櫒錛屼富鍔ㄩ泦綰垮櫒鍙互灝嗚漿鍙戠殑鍒嗙粍閲嶆柊鍚屾銆傛湁鏃舵暟鎹牴鏈氨鍒頒笉浜嗙洰鐨勫湴錛屼富鍔ㄩ泦綰垮櫒閫氳繃鍦ㄥ崟涓鍙i噸鍙戝垎緇勬潵寮ヨˉ鏁版嵁鐨勪涪澶便備富鍔ㄩ泦綰垮櫒鍙互璋冩暣鏃跺簭浠ラ傚簲杈冩參鐨勩侀敊璇巼杈冮珮鐨勮繛鎺ャ傚綋鐒訛紝榪欐牱鍋氫細闄嶄綆榪炴帴鍒拌闆嗙嚎鍣ㄤ笂璁懼鐨勬暣浣撶綉緇滈熷害錛屼絾鏄紝鏈夋椂榪欐瘮涓㈠け鏁版嵁瑕佸ソ銆傛澶栨椂搴忚皟鏁村疄闄呬笂鍙互鍑忓皯灞鍩熺綉涓殑鍐茬獊嬈℃暟錛屾暟鎹笉闇瑕侀噸澶嶅箍鎾紝灞鍩熺綉灝卞彲浠ヤ紶杈撴柊鐨勬暟鎹?br><br>涓誨姩闆嗙嚎鍣ㄦ彁渚涗竴瀹氱殑浼樺寲鎬ц兘鍜屼竴浜涜瘖鏂兘鍔涳紝瀹冧滑姣旂畝鍗曠殑琚姩闆嗙嚎鍣ㄨ吹錛屽彲浠ラ厤浠ュ涓佸縐嶇鍙c?br><br>4銆佹櫤鑳介泦綰垮櫒<br><br>鏅鴻兘闆嗙嚎鍣ㄦ瘮鍓嶄袱縐嶆彁渚涙洿澶氱殑濂藉錛屽彲浠ヤ嬌鐢ㄦ埛鏇存湁鏁堝湴鍏變韓璧勬簮銆傚叾鎶鏈繎浜涘勾鎵嶅嚭鐜幫紝寰堝鍦版柟榪樻病鏈夋満浼氫韓鍙楀埌瀹冪殑濂藉銆傞櫎浜嗕富鍔ㄩ泦綰垮櫒鐨勭壒鎬у錛屾櫤鑳介泦綰垮櫒鎻愪緵浜嗛泦涓鐞嗗姛鑳姐傚鏋滆繛鎺ュ埌鏅鴻兘闆嗙嚎鍣ㄤ笂鐨勮澶囧嚭浜嗛棶棰橈紝浣犲彲浠ュ緢瀹規槗鐨勮瘑鍒佽瘖鏂拰淇ˉ銆傝繖鏄瀬澶х殑鎻愰珮錛屽湪涓涓ぇ鍨嬬綉緇滈噷錛屽鏋滄病鏈夐泦涓殑綆$悊宸ュ叿錛岄偅涔堜綘甯稿父闇瑕佷竴涓竴涓嚎鐩掑湴璺戯紝瀵繪壘鍑洪棶棰樼殑璁懼銆?br><br>鏅鴻兘闆嗙嚎鍣ㄧ殑鍙︿竴涓嚭鑹茬殑鐗規ф槸鍙互涓轟笉鍚岃澶囨彁渚涚伒媧葷殑浼犺緭閫熺巼銆傞櫎浜嗕笂榪炲埌楂橀熶富騫茬殑绔彛澶栵紝鏅鴻兘闆嗙嚎鍣ㄨ繕鏀寔鍒版闈㈢殑10銆?6鍜?00Mbps鐨勯熺巼錛屽嵆浠ュお緗戙佷護鐗岀幆鍜孎DDI銆?br><br>5銆侀珮綰х壒鎬?br><br>楂樼闆嗙嚎鍣ㄨ繕鎻愪緵鍏跺畠涓浜涚壒鎬э紝濡傚啑浣欎氦嫻佺數婧愩佸唴緗洿嫻佺數婧愩佸啑浣欓鎵囷紝榪樻湁綰跨紗榪炴帴鐨勮嚜鍔ㄤ腑鏂佹ā鍧楃殑鐑彃鎷斻佽嚜鍔ㄨ皟鏁?0Base-T鎺ュご鐨勬瀬鎬э紝鍐嶅鍐椾綑閰嶇疆瀛樿串銆佸啑浣欐椂閽燂紝鏈変簺闆嗙嚎鍣ㄨ繕闆嗘垚浜嗚礬鐢卞拰妗ユ帴鍔熻兘銆? <img src ="http://www.shnenglu.com/huangjianfu/aggbug/87326.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/huangjianfu/" target="_blank">榛勫墤鐖?/a> 2009-06-10 15:46 <a href="http://www.shnenglu.com/huangjianfu/archive/2009/06/10/87326.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>浠ュお緗戞暀紼嬶細緗戞ˉ錛堣漿錛?/title><link>http://www.shnenglu.com/huangjianfu/archive/2009/06/10/87325.html</link><dc:creator>榛勫墤鐖?/dc:creator><author>榛勫墤鐖?/author><pubDate>Wed, 10 Jun 2009 07:44:00 GMT</pubDate><guid>http://www.shnenglu.com/huangjianfu/archive/2009/06/10/87325.html</guid><wfw:comment>http://www.shnenglu.com/huangjianfu/comments/87325.html</wfw:comment><comments>http://www.shnenglu.com/huangjianfu/archive/2009/06/10/87325.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/huangjianfu/comments/commentRss/87325.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/huangjianfu/services/trackbacks/87325.html</trackback:ping><description><![CDATA[璧勬枡鏉ユ簮錛?a >http://www.cnpaf.net/Class/Ethernet/200408/403.html</a>錛屼腑鍥藉崗璁垎鏋愮綉<br>涓銆佷粈涔堟槸緗戞ˉ錛?br><br><br>緗戞ˉ宸ヤ綔鍦ㄦ暟鎹摼璺眰錛屽皢涓や釜LAN榪炶搗鏉ワ紝鏍規嵁MAC鍦板潃鏉ヨ漿鍙戝撫錛屽彲浠ョ湅浣滀竴涓?#8220;浣庡眰鐨勮礬鐢卞櫒”錛堣礬鐢卞櫒宸ヤ綔鍦ㄧ綉緇滃眰錛屾牴鎹綉緇滃湴鍧濡侷P鍦板潃榪涜杞彂錛夈?br> <p align=center><img height=485 src="http://www.cnpaf.net/article/Files/RoUpimages/0182210985.jpg" width=259 border=0></p> <br>銆<br><br>榪滅▼緗戞ˉ閫氳繃涓涓氬父杈冩參鐨勯摼璺紙濡傜數璇濈嚎錛夎繛鎺ヤ袱涓繙紼婰AN錛屽鏈湴緗戞ˉ鑰岃█錛屾ц兘姣旇緝閲嶈錛岃屽榪滅▼緗戞ˉ鑰岃█錛屽湪闀胯窛紱諱笂鍙甯歌繍琛屾槸鏇撮噸瑕佺殑銆?br><br>緗戞ˉ涓庤礬鐢卞櫒鐨勬瘮杈?br><br>緗戞ˉ騫朵笉浜嗚В鍏惰漿鍙戝撫涓珮灞傚崗璁殑淇℃伅錛岃繖浣垮畠鍙互鍚屾椂浠ュ悓縐嶅嚒鏄鐞咺P銆両PX絳夊崗璁紝瀹冭繕鎻愪緵浜嗗皢鏃犺礬鐢卞崗璁殑緗戠粶錛堝NetBEUI錛夊垎孌電殑鍔熻兘銆?br><br>鐢變簬璺敱鍣ㄥ鐞嗙綉緇滃眰鐨勬暟鎹紝鍥犳瀹冧滑鏇村鏄撲簰榪炰笉鍚岀殑鏁版嵁閾捐礬灞傦紝濡備護鐗岀幆緗戞鍜屼互澶綉孌點傜綉妗ラ氬父姣旇礬鐢卞櫒闅炬帶鍒躲傝薄IP絳夊崗璁湁澶嶆潅鐨勮礬鐢卞崗璁紝浣跨綉綆℃槗浜庣鐞嗚礬鐢憋紱IP絳夊崗璁繕鎻愪緵浜嗚緝澶氱殑緗戠粶濡備綍鍒嗘鐨勪俊鎭紙鍗充嬌鍏跺湴鍧涔熸彁渚涗簡姝ょ被淇℃伅錛夈傝岀綉妗ュ垯鍙敤MAC鍦板潃鍜岀墿鐞嗘嫇鎵戣繘琛屽伐浣溿傚洜姝ょ綉妗ヤ竴鑸備簬灝忓瀷杈冪畝鍗曠殑緗戠粶銆?br><br>浜屻佷嬌鐢ㄥ師鍥?br><br><br>璁稿鍗曚綅閮芥湁澶氫釜灞鍩熺綉錛屽茍涓斿笇鏈涜兘澶熷皢瀹冧滑榪炴帴璧鋒潵銆備箣鎵浠ヤ竴涓崟浣嶆湁澶氫釜灞鍩熺綉錛屾湁浠ヤ笅6涓師鍥狅細<br><br>棣栧厛錛岃澶氬ぇ瀛︾殑緋繪垨鍏徃鐨勯儴闂ㄩ兘鏈夊悇鑷殑灞鍩熺綉錛屼富瑕佺敤浜庤繛鎺ヤ粬浠嚜宸辯殑涓漢璁$畻鏈恒佸伐浣滅珯浠ュ強鏈嶅姟鍣ㄣ傜敱浜庡悇緋伙紙鎴栭儴闂級鐨勫伐浣滄ц川涓嶅悓錛屽洜姝ら夌敤浜嗕笉鍚岀殑灞鍩熺綉錛岃繖浜涚郴錛堟垨閮ㄩ棬錛変箣闂存棭鏅氶渶鐩鎬簰浜ゅ線錛屽洜鑰岄渶瑕佺綉妗ャ?br><br>鍏舵錛屼竴涓崟浣嶅湪鍦扮悊浣嶇疆涓婅緝鍒嗘暎錛屽茍涓旂浉璺濊緝榪滐紝涓庡叾瀹夎涓涓亶甯冩墍鏈夊湴鐐圭殑鍚岃醬鐢電紗緗戯紝涓嶅鍦ㄥ悇涓湴鐐瑰緩绔嬩竴涓眬鍩熺綉錛屽茍鐢ㄧ綉妗ュ拰綰㈠閾捐礬榪炴帴璧鋒潵錛岃繖鏍瘋垂鐢ㄥ彲鑳戒細浣庝竴浜涖?br><br>絎?錛屽彲鑳芥湁蹇呰灝嗕竴涓昏緫涓婂崟涓鐨凩AN鍒嗘垚澶氫釜灞鍩熺綉錛屼互璋冭妭杞借嵎銆備緥濡傞噰鐢ㄧ敱緗戞ˉ榪炴帴鐨勫涓眬鍩熺綉錛屾瘡涓眬鍩熺綉鏈変竴緇勫伐浣滅珯錛屽茍涓旀湁鑷繁鐨勬枃浠舵湇鍔″櫒錛屽洜姝ゅぇ閮ㄥ垎閫氫俊闄愪簬鍗曚釜灞鍩熺綉鍐咃紝鍑忚交浜嗕富騫茬綉鐨勮礋鎷呫?br><br>絎?4錛屽湪鏈変簺鎯呭喌涓嬶紝浠庤澆鑽蜂笂鐪嬪崟涓眬鍩熺綉鏄鏃犻棶棰樼殑錛屼絾鏄浉璺濇渶榪滅殑鏈哄櫒涔嬮棿鐨勭墿鐞嗚窛紱誨お榪滐紙姣斿瓚呰繃802.3鎵瑙勫畾鐨?.5km錛夈傚嵆浣跨數緙嗛摵璁句笉鎴愰棶棰橈紝浣嗙敱浜庢潵鍥炴椂寤惰繃闀匡紝緗戠粶浠嶅皢涓嶈兘姝e父宸ヤ綔銆傚敮涓鐨勫姙娉曟槸灝嗗眬鍩熺綉鍒嗘錛屽湪鍚勬涔嬮棿鏀劇疆緗戞ˉ銆傞氳繃浣跨敤緗戞ˉ錛屽彲浠ュ鍔犲伐浣滅殑鎬葷墿鐞嗚窛紱匯?br><br>絎?錛屽彲闈犳ч棶棰樸傚湪涓涓崟鐙殑灞鍩熺綉涓紝涓涓湁緙洪櫡鐨勮妭鐐逛笉鏂湴杈撳嚭鏃犵敤鐨勪俊鎭祦浼氫弗閲嶅湴鐮村潖灞鍩熺綉鐨勮繍琛屻傜綉妗ュ彲浠ヨ緗湪灞鍩熺綉涓殑鍏抽敭閮ㄤ綅錛屽氨鍍忓緩絳戠墿鍐呯殑鏀劇伀闂ㄤ竴鏍鳳紝闃叉鍥犲崟涓妭鐐瑰け甯歌岀牬鍧忔暣涓郴緇熴?br><br>絎?錛岀綉妗ユ湁鍔╀簬瀹夊叏淇濆瘑銆傚ぇ澶氭暟LAN鎺ュ彛閮芥湁涓縐嶆販鏉傚伐浣滄柟寮?promiscuousmode)錛屽湪榪欑鏂瑰紡涓嬶紝璁$畻鏈烘帴鏀舵墍鏈夌殑甯э紝鍖呮嫭閭d簺騫朵笉鏄紪鍧鍙戦佺粰瀹冪殑甯с傚鏋滅綉涓澶勮緗綉妗ュ茍璋ㄦ厧鍦版嫤鎴棤欏昏漿鍙戠殑閲嶈淇℃伅錛岄偅涔堝氨鍙互鎶婄綉緇滃垎闅斾互闃叉淇℃伅琚獌銆?br><br>涓夈佸吋瀹規ч棶棰?br><br><br>鏈変漢鍙兘浼氬ぉ鐪熷湴璁や負浠庝竴涓?02灞鍩熺綉鍒板彟涓涓?02灞鍩熺綉鐨勭綉妗ラ潪甯哥畝鍗曪紝浣嗗疄闄呬笂騫墮潪濡傛銆傚湪802.x鍒?02.y鐨勪節縐嶇粍鍚堜腑錛屾瘡涓縐嶉兘鏈夊畠鑷繁鐨勭壒孌婇棶棰樿瑙e喅銆傚湪璁ㄨ榪欎簺鐗規畩闂涔嬪墠錛屽厛鏉ョ湅涓鐪嬭繖浜涚綉妗ュ叡鍚岄潰涓寸殑涓鑸ч棶棰樸?br><br>棣栧厛錛屽悇縐嶅眬鍩熺綉閲囩敤浜嗕笉鍚岀殑甯ф牸寮忋傝繖縐嶄笉鍏煎鎬у茍涓嶆槸鐢辨妧鏈笂鐨勫師鍥犻犳垚鐨勶紝鑰屼粎浠呮槸鐢變簬鏀寔涓夌鏍囧噯鐨勫叕鍙?Xerox,GM鍜孖BM)錛屾病鏈変竴瀹舵効鎰忔敼鍙樿嚜宸辨墍鏀寔鐨勬爣鍑嗐傚叾緇撴灉鏄細鍦ㄤ笉鍚岀殑灞鍩熺綉闂村鍒跺撫瑕侀噸鎺掓牸寮忥紝榪欓渶瑕佸崰鐢–PU鏃墮棿錛岄噸鏂拌綆楁牎楠屽拰錛岃屼笖榪樻湁鍙兘浜х敓鍥犵綉妗ュ瓨鍌ㄩ敊璇岄犳垚鐨勬棤娉曟嫻嬬殑閿欒銆?br><br>絎簩涓棶棰樻槸浜掕仈鐨勫眬鍩熺綉騫墮潪蹇呴』鎸夌浉鍚岀殑鏁版嵁浼犺緭閫熺巼榪愯銆傚綋蹇熺殑灞鍩熺綉鍚戞參閫熺殑灞鍩熺綉鍙戦佷竴闀夸覆榪炵畫甯ф椂錛岀綉妗ュ鐞嗗撫鐨勯熷害瑕佹瘮甯ц繘鍏ョ殑閫熷害鎱€傜綉妗ュ繀欏葷敤緙撳啿鍖哄瓨鍌ㄦ潵涓嶅強澶勭悊鐨勫撫錛屽悓鏃惰繕寰楁彁闃茶楀敖瀛樺偍鍣ㄣ傚嵆浣挎槸10Mb/s鐨?02.4鍒?0Mb/s鐨?802.3鐨勭綉妗ワ紝鍦ㄦ煇縐嶇▼搴︿笂涔熷瓨鍦ㄨ繖鏍風殑闂銆傚洜涓?02.3鐨勯儴鍒嗗甫瀹借楄垂浜庡啿紿併?02.3瀹為檯涓婂茍涓嶆槸鐪熺殑10Mb/s錛岃?02.4(鍑犱箮) 紜疄涓?0Mb/s銆?br><br>涓庣綉妗ョ摱棰堥棶棰樼浉鍏崇殑涓涓粏寰岄噸瑕佺殑闂鏄叾涓婂悇灞傜殑璁℃椂鍣ㄥ箋傚亣濡?02.4灞鍩熺綉涓婄殑緗戠粶灞傛兂鍙戦佷竴孌靛緢闀跨殑鎶ユ枃(甯у簭鍒?銆傚湪鍙戝嚭鏈鍚庝竴甯т箣鍚庯紝瀹冨紑鍚竴涓鏃跺櫒錛岀瓑寰呯‘璁ゃ傚鏋滄鎶ユ枃蹇呴』閫氳繃緗戞ˉ杞埌鎱㈤熺殑802.5緗戠粶錛岄偅涔堝湪鏈鍚庝竴甯ц杞彂鍒頒綆閫熷眬鍩熺綉涔嬪墠錛岃鏃跺櫒灝辨湁鍙兘鏃墮棿鍒般傜綉緇滃眰鍙兘浼氫互涓哄撫涓㈠け鑰岄噸鏂板彂閫佹暣涓姤鏂囥傚嚑嬈′紶閫佸け璐ュ悗錛岀綉緇滃眰灝變細鏀懼純浼犺緭騫跺憡璇変紶杈撳眰鐩殑绔欑偣宸茬粡鍏蟲満銆?br><br>絎笁錛屽湪鎵鏈夌殑闂涓紝鍙兘鏈涓轟弗閲嶇殑闂鏄笁縐?02LAN鏈変笉鍚岀殑鏈澶у撫闀垮害銆傚浜?02.3錛屾渶澶у撫闀垮害鍙栧喅浜庨厤緗弬鏁幫紝浣嗗鏍囧噯鐨?0M/bs緋葷粺鏈澶ф湁鏁堣澆鑽蜂負1500瀛楄妭銆?02.4鐨勬渶澶у撫闀垮害鍥哄畾涓?191瀛楄妭銆?02.5娌℃湁涓婇檺錛屽彧瑕佺珯鐐圭殑浼犺緭鏃墮棿涓嶈秴榪囦護鐗屾寔鏈夋椂闂淬傚鏋滀護鐗屾椂闂寸己鐪佷負10ms錛屽垯鏈澶у撫闀垮害涓?000瀛楄妭銆備竴涓樉鑰屾槗瑙佺殑闂鍑虹幇浜嗭細褰撳繀欏繪妸涓涓暱甯ц漿鍙戠粰涓嶈兘鎺ユ敹闀垮撫鐨勫眬鍩熺綉鏃訛紝灝嗕細鎬庝箞鏍鳳紵鍦ㄦ湰灞備腑涓嶈冭檻鎶婂撫鍒嗘垚灝忔銆傛墍鏈夌殑鍗忚閮藉亣瀹氬撫瑕佷箞鍒拌揪瑕佷箞娌℃湁鍒拌揪錛屾病鏈夋潯嬈捐瀹氭妸鏇村皬鐨勫崟浣嶉噸緇勬垚甯с傝繖騫朵笉鏄涓嶈兘璁捐榪欐牱鐨勫崗璁紝鍙互璁捐騫跺凡鏈夎繖縐嶅崗璁紝鍙槸 802涓嶆彁渚涜繖縐嶅姛鑳姐傝繖涓棶棰樺熀鏈笂鏃犳硶瑙e喅錛屽繀欏諱涪寮冨洜澶暱鑰屾棤娉曡漿鍙戠殑甯с傚叾閫忔槑紼嬪害涔熷氨榪欐牱浜嗐?br><br>鐢變簬鍚勭802LAN鐨勭壒孌婃э紝濡傦細802.4甯у甫鏈変紭鍏堟潈浣嶃?02.5甯у瓧鑺備腑鏈堿鍜孋浣嶇瓑錛屼節縐嶇綉妗ラ兘鏈夊叾鐗規畩鐨勯棶棰橈紝瑙佷笅琛細<br><br>銆銆鐩殑LAN<br>銆銆802.3(CSMA/CD)802.4(浠ょ墝鎬葷嚎)802.5(浠ょ墝鐜?<br>婧怢AN802.3銆1,41,2,4,8<br>802.41,5,8,9,1091,2,3,8,9,10<br>802.51,2,5,6,7,101,2,3,6,76,7<br><br>1銆侀噸鏂版牸寮忓寲甯э紝騫惰綆楁柊鐨勬牎楠屽拰銆?br>2銆佸弽杞瘮鐗歸『搴忋?br>3銆佸鍒朵紭鍏堟潈鍊鹼紝涓嶇鏈夋棤鎰忎箟銆?br>4銆佷駭鐢熶竴涓亣鎯崇殑浼樺厛鏉冦?br>5銆佷涪寮冧紭鍏堟潈銆?br>6銆佹祦鍚戠幆錛堟煇縐嶇▼搴︿笂錛夈?br>7銆佽緗瓵浣嶅拰C浣嶃?br>8銆佹媴蹇冩嫢濉烇紙蹇烲AN鑷蟲參閫烲AN錛夈?br>9銆佹媴蹇冧護鐗屽洜涓轟氦鎹CK寤惰繜鎴栦笉鍙兘鑰岃劚鎵嬨?br>10銆佸鏋滃撫瀵圭洰鐨凩AN澶暱錛屽垯灝嗗叾涓㈠純銆?br><br>璁懼畾鐨勫弬鏁幫細<br>802.3錛?500瀛楄妭甯?0Mb/s(鍑忓幓紕版挒嬈℃暟)<br>802.4錛?191瀛楄妭甯?0Mb/s<br>802.5錛?000瀛楄妭甯?Mb/s<br><br>褰?IEEE802濮斿憳浼氬紑濮嬪埗璁AN鏍囧噯鏃訛紝鏈兘鍟嗗畾涓涓粺涓鐨勬爣鍑嗭紝鍗翠駭鐢熶簡3涓簰涓嶅吋瀹圭殑鏍囧噯錛岃繖涓澶辯瓥宸插彈鍒頒簡涓ュ帀鐨勬姩鍑匯傚悗鏉ワ紝鍦ㄥ埗瀹氫簰鑱旇繖3縐?LAN鐨勭綉妗ョ殑鏍囧噯鏃訛紝璇ュ鍛樹細鍐沖績騫插緱濂戒竴浜涖傝繖涓嬈$‘瀹炶緝涓烘垚鍔燂紝浠栦滑鎻愬嚭浜?縐嶄簰涓嶅吋瀹圭殑緗戞ˉ鏂規銆傜洿鍒扮洰鍓嶄負姝紝榪樻棤浜鴻姹傝濮斿憳浼氬埗璁㈣繛鎺ュ畠鐨?2涓笉鍏煎緗戞ˉ鐨勭綉鍏蟲爣鍑嗐?br><br>鍥涖佷袱縐嶇綉妗?br><br>1銆侀忔槑緗戞ˉ<br><br><br>絎竴縐?02緗戞ˉ鏄忔槑緗戞ˉ 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VLSI鑺墖錛岃鑺墖鍒嗘媴浜嗙綉妗ョ殑璁稿宸ヤ綔錛屽洜姝わ紝緗戞ˉ鍙互閲囩敤閫熷害杈冩參鐨凜PU錛屾垨鑰呭彲浠ヨ繛鎺ユ洿澶氱殑LAN銆?br><br>婧愯礬鐢遍夋嫨鐨勫墠鎻愭槸浜掕仈緗戜腑鐨勬瘡鍙版満鍣ㄩ兘鐭ラ亾鎵鏈夊叾浠栨満鍣ㄧ殑鏈浣寵礬寰勩傚浣曞緱鍒拌繖浜涜礬鐢辨槸婧愯礬鐢遍夋嫨綆楁硶鐨勯噸瑕侀儴鍒嗐傝幏鍙栬礬鐢辯畻娉曠殑鍩烘湰鎬濇兂鏄細濡傛灉涓嶇煡閬撶洰鐨勫湴鍦板潃鐨勪綅緗紝婧愭満鍣ㄥ氨鍙戝竷涓騫挎挱甯э紝璇㈤棶瀹冨湪鍝噷銆傛瘡涓綉妗ラ兘杞彂璇ユ煡鎵懼撫(discoveryframe)錛岃繖鏍瘋甯у氨鍙埌杈句簰鑱旂綉涓殑姣忎竴涓狶AN銆傚綋絳斿鍥炴潵鏃訛紝閫旂粡鐨勭綉妗ュ皢瀹冧滑鑷繁鐨勬爣璇嗚褰曞湪絳斿甯т腑錛屼簬鏄紝騫挎挱甯х殑鍙戦佽呭氨鍙互寰楀埌紜垏鐨勮礬鐢憋紝騫跺彲浠庝腑閫夊彇鏈浣寵礬鐢便?br><br>铏界劧姝ょ畻娉曞彲浠ユ壘鍒版渶浣寵礬鐢憋紙瀹冩壘鍒頒簡鎵鏈夌殑璺敱錛夛紝浣嗗悓鏃朵篃闈復鐫甯х垎鐐哥殑闂銆傞忔槑緗戞ˉ涔熶細鍙戠敓鏈夌偣綾諱技鐨勭姸鍐碉紝浣嗘槸娌℃湁榪欎箞涓ラ噸銆傚叾鎵╂暎鏄寜鐢熸垚鏍戣繘琛岋紝鎵浠ヤ紶閫佺殑鎬誨撫鏁版槸緗戠粶澶у皬鐨勭嚎鎬у嚱鏁幫紝鑰屼笉璞℃簮璺敱閫夋嫨鏄寚鏁板嚱鏁般備竴鏃︿富鏈烘壘鍒拌嚦鏌愮洰鐨勫湴鐨勪竴鏉¤礬鐢憋紝瀹冨氨灝嗗叾瀛樺叆鍒伴珮閫熺紦鍐插櫒涔嬩腑錛屾棤闇鍐嶄綔鏌ユ壘銆傝櫧鐒惰繖縐嶆柟娉曞ぇ澶ч亸鍒朵簡甯х垎鐐革紝浣嗗畠緇欐墍鏈夌殑涓繪満澧炲姞浜嗕簨鍔℃ц礋鎷咃紝鑰屼笖鏁翠釜綆楁硶鑲畾鏄笉閫忔槑鐨勩?br><br>3銆佷袱縐嶇綉妗ョ殑姣旇緝<br> <p align=center><img height=297 src="http://www.cnpaf.net/article/Files/RoUpimages/0182218296.jpg" width=560 border=0></p> <br><br><br><br>閫忔槑緗戞ˉ涓鑸敤浜庤繛鎺ヤ互澶綉孌碉紝鑰屾簮璺敱閫夋嫨緗戞ˉ鍒欎竴鑸敤浜庤繛鎺ヤ護鐗岀幆緗戞銆?br><br>浜斻佽繙紼嬬綉妗?br><br><br>緗戞ˉ鏈夋椂涔熻鐢ㄦ潵榪炴帴涓や釜鎴栧涓浉璺濊緝榪滅殑LAN銆傛瘮濡傦紝鏌愪釜鍏徃鍒嗗竷鍦ㄥ涓煄甯備腑錛岃鍏徃鍦ㄦ瘡涓煄甯備腑鍧囨湁涓涓湰鍦扮殑LAN錛屾渶鐞嗘兂鐨勬儏鍐靛氨鏄墍鏈夌殑LAN鍧囪繛鎺ヨ搗鏉ワ紝鏁翠釜緋葷粺灝卞儚涓涓ぇ鍨嬬殑LAN涓鏍楓?br><br>璇ョ洰鏍囧彲閫氳繃涓嬭堪鏂規硶瀹炵幇錛氭瘡涓狶AN涓潎璁劇疆涓涓綉妗ワ紝騫朵笖鐢ㄧ偣鍒扮偣鐨勮繛鎺ワ紙姣斿縐熺敤鐢佃瘽鍏徃鐨勭數璇濈嚎錛夊皢瀹冧滑涓や釜涓や釜鍦拌繛鎺ヨ搗鏉ャ傜偣鍒扮偣榪炵嚎鍙噰鐢ㄥ悇縐嶄笉鍚岀殑鍗忚銆傚姙娉曚箣涓灝辨槸閫夌敤鏌愮鏍囧噯鐨勭偣鍒扮偣鏁版嵁閾捐礬鍗忚錛屽皢瀹屾暣鐨凪AC甯у姞鍒版湁鏁堣澆鑽蜂腑銆傚鏋滄墍鏈夌殑LAN鍧囩浉鍚岋紝榪欑鍔炴硶鐨勬晥鏋滄渶濂斤紝瀹冪殑鍞竴闂灝辨槸蹇呴』灝嗗撫閫佸埌姝g‘鐨凩AN涓傚彟涓縐嶅姙娉曟槸鍦ㄦ簮緗戞ˉ涓幓鎺塎AC鐨勫ご閮ㄥ拰灝鵑儴錛屽茍鎶婂墿涓嬬殑閮ㄥ垎鍔犲埌鐐瑰埌鐐瑰崗璁殑鏈夋晥杞借嵎涓紝鐒跺悗鍦ㄧ洰鐨勭綉妗ヤ腑浜х敓鏂扮殑澶撮儴鍜屽熬閮ㄣ傚畠鐨勭己鐐規槸鍒拌揪鐩殑涓繪満鐨勬牎楠屽拰騫墮潪鏄簮涓繪満鎵璁$畻鐨勬牎楠屽拰錛屽洜姝ょ綉妗ュ瓨鍌ㄥ櫒涓煇浣嶆崯鍧忔墍浜х敓鐨勯敊璇彲鑳戒笉浼氳媯嫻嬪埌銆? <img src ="http://www.shnenglu.com/huangjianfu/aggbug/87325.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/huangjianfu/" target="_blank">榛勫墤鐖?/a> 2009-06-10 15:44 <a href="http://www.shnenglu.com/huangjianfu/archive/2009/06/10/87325.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>嫻呰皥Ethernet鐨勫撫鏍煎紡錛堣漿錛?/title><link>http://www.shnenglu.com/huangjianfu/archive/2009/06/10/87321.html</link><dc:creator>榛勫墤鐖?/dc:creator><author>榛勫墤鐖?/author><pubDate>Wed, 10 Jun 2009 07:35:00 GMT</pubDate><guid>http://www.shnenglu.com/huangjianfu/archive/2009/06/10/87321.html</guid><wfw:comment>http://www.shnenglu.com/huangjianfu/comments/87321.html</wfw:comment><comments>http://www.shnenglu.com/huangjianfu/archive/2009/06/10/87321.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/huangjianfu/comments/commentRss/87321.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/huangjianfu/services/trackbacks/87321.html</trackback:ping><description><![CDATA[璧勬枡鏉ユ簮錛?a >http://www.cnpaf.net/Class/Ethernet/200512/10646.html</a>錛屼腑鍥藉崗璁垎鏋愮綉<br><br> <p>鐢ㄨ繃NetXray涔嬬被鐨勬姄鍖呰蔣浠剁殑浜猴紝鍙兘緇忓父浼氳涓浜?nbsp; 涓嶅悓鐨凢rame Header鎼炵硦娑傦紝涓轟綍鐢ㄧ殑Frame鐨凥eader <br> 鏄繖鏍風殑錛岃屽彟澶栫殑鍙堜笉涓鏍楓傝繖鏄洜涓哄湪Ethernet  涓瓨鍦ㄥ嚑縐嶄笉鍚岀殑甯ф牸寮忥紝涓嬮潰鎴戝氨綆鍗曚粙緇嶄竴涓嬪嚑縐?<br> 涓嶅悓鐨勫撫鏍煎紡鍙婁粬浠殑宸紓銆?</p> <p><strong> 涓銆侲thernet甯ф牸寮忕殑鍙戝睍</strong> </p> <p> 1980 DEC,Intel,Xerox鍒惰浜咵thernet I鐨勬爣鍑?<br> 1982 DEC,Intel,Xerox鍙堝埗璁簡Ehternet II鐨勬爣鍑?<br> 1982 IEEE寮濮嬬爺絀禘thernet鐨勫浗闄呮爣鍑?02.3 <br> 1983 榪笉鍙婂緟鐨凬ovell鍩轟簬IEEE鐨?02.3鐨勫師濮嬬増寮鍙戜簡涓撶敤鐨凟thernet甯ф牸寮?<br> 1985 IEEE鎺ㄥ嚭IEEE 802.3瑙勮寖 <br>      鍚庢潵涓鴻В鍐矱thernetII涓?02.3甯ф牸寮忕殑鍏煎闂鎺ㄥ嚭鎶樿》鐨凟thernet SNAP鏍煎紡 </p> <p> (鍏朵腑鏃╂湡鐨凟thernet I宸茬粡瀹屽叏琚叾浠栧撫鏍煎紡鍙栦唬浜嗘墍浠ョ幇鍦‥thernet鍙兘瑙佸埌鍚庨潰鍑犵Ethernet鐨勫撫鏍煎紡鐜板湪澶ч儴鍒嗙殑緗戠粶璁懼閮芥敮鎸佽繖鍑犵Ethernet鐨勫撫鏍煎紡濡?cisco鐨勮礬鐢卞櫒鍐嶈瀹欵thernet鎺ュ彛鏃跺彲浠ユ寚瀹氫笉鍚岀殑浠ュお緗戠殑甯ф牸寮?arpa,sap,snap,novell-ether) </p> <p><strong> 浜?鍚勭涓嶅悓鐨勫撫鏍煎紡</strong> <br> 涓嬮潰浠嬬粛涓涓嬪悇涓撫鏍煎紡  </p> <ul> <li> <strong>Ethernet II</strong> <br>   灝辨槸DIX浠ュお緗戣仈鐩熸帹鍑虹殑錛屽畠鐢?涓瓧鑺傜殑鐩殑MAC鍦板潃錛?涓瓧鑺傜殑婧怣AC鍦板潃錛?涓瓧鑺傜殑綾誨瀷鍩燂紙鐢ㄤ簬鏍囩ず灝佽鍦ㄨ繖涓狥rame銆侀噷闈㈡暟鎹殑綾誨瀷)浠ヤ笂涓篎rame Header,鎺ヤ笅鏉ユ槸46--1500 瀛楄妭鐨勬暟鎹紝鍜?瀛楄妭鐨勫撫鏍¢獙錛? <li><strong>Novell Ethernet</strong> <br>   瀹冪殑甯уご涓嶦thernet鏈夋墍涓嶅悓鍏朵腑EthernetII甯уご涓殑綾誨瀷鍩熷彉鎴愪簡闀垮害鍩燂紝鍚庨潰鎺ョ潃鐨勪袱涓瓧鑺備負0xFFFF <br>   鐢ㄤ簬鏍囩ず榪欎釜甯ф槸Novell Ether綾誨瀷鐨凢rame 鐢變簬鍓嶉潰鐨?xFFFF绔欐帀浜嗕袱涓瓧鑺傛墍浠ユ暟鎹煙緙╁皬涓?4-1498涓瓧鑺?甯ф牎楠屼笉鍙樸? <li><strong>IEEE 802.3/802.2 <br></strong>   802.3鐨凢rame Header鍜孍thernet II鐨勫撫澶存湁鎵涓嶅悓EthernetII綾誨瀷鍩熷彉鎴愪簡闀垮害鍩熴傚叾涓張寮曞叆802.2鍗忚(LLC)鍦?02.3甯уご鍚庨潰娣誨姞浜嗕竴涓狶LC棣栭儴,鐢?DSAP(Destination Service Access Point) <br>   1 byte,SSAP(Source SAP),涓涓帶鍒跺煙--1 byte! <br>   SAP鐢ㄤ簬鏍囩ず甯х殑涓婂眰鍗忚 <li><strong>Ethernet SNAP</strong> <br>   SNAP Frame涓?02.3/802.2 Frame鐨勬渶澶у尯鍒槸澧炲姞浜嗕竴涓? Bytes鐨凷NAP ID鍏朵腑鍓嶉潰3涓猙yte閫氬父涓庢簮mac鍦板潃鐨勫墠涓変釜bytes鐩稿悓涓哄巶鍟嗕唬鐮侊紒鏈夋椂涔熷彲璁句負0,鍚? bytes 涓嶦thernet II鐨勭被鍨嬪煙鐩稿悓銆傘傘?</li> </ul> <p> <br> <strong>涓?濡備綍鍖哄垎涓嶅悓鐨勫撫鏍煎紡</strong> <br>   <br>   Ethernet涓瓨鍦ㄨ繖鍥涚Frame閭d簺緗戠粶璁懼鍙堟槸濡備綍璇嗗埆鐨勫憿? 濡備綍鍖哄垎EthernetII涓庡叾浠栦笁縐嶆牸寮忕殑Frame 濡傛灉甯уご璺熼殢source mac鍦板潃鐨? bytes鐨勫煎ぇ浜?500 鍒欐Frame涓篍thernetII鏍煎紡鐨勩?<br>    <br>   鎺ョ潃姣旇緝绱ф帴鐫鐨勪袱bytes濡傛灉涓?xFFFF鍒欎負Novell Ether 綾誨瀷鐨凢rame <br>   濡傛灉涓?xAAAA鍒欎負Ethernet SNAP鏍煎紡鐨凢rame 錛屽鏋滈兘涓嶆槸鍒欎負Ethernet 802.3/802.2鏍煎紡鐨勫撫</p> <img src ="http://www.shnenglu.com/huangjianfu/aggbug/87321.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/huangjianfu/" target="_blank">榛勫墤鐖?/a> 2009-06-10 15:35 <a href="http://www.shnenglu.com/huangjianfu/archive/2009/06/10/87321.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item></channel></rss> <a href="http://www.shnenglu.com/">青青草原综合久久大伊人导航_色综合久久天天综合_日日噜噜夜夜狠狠久久丁香五月_热久久这里只有精品</a> <div 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