锘??xml version="1.0" encoding="utf-8" standalone="yes"?> 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 涓銆侲thernet甯ф牸寮忕殑鍙戝睍 1980 DEC,Intel,Xerox鍒惰浜咵thernet I鐨勬爣鍑? (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) 浜?鍚勭涓嶅悓鐨勫撫鏍煎紡
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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>
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>
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>
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>
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>
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
浜屻佽皝闇瑕侀泦綰垮櫒錛?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$壒孌婂彂閫佺涓庢帴鏀剁浜ゅ弶榪炴帴鐨勭嚎緙嗭紝榪欑綰跨紗寰堟櫘閫氾紝濡傛灉浣犲疄鍦ㄦ壘涓嶅埌錛屼篃鍙互鑷繁鍋氫竴涓紝寰堝鏄撲篃寰堜究瀹滐紝鎵闇鐗╁搧涓轟竴灝忔鍙岀粸綰褲佷袱涓猂J-45鎺ュご鍜屽伐鍏鳳紝鎸夌収涓嬭〃榪炴帴灝辨槸浜嗐?br>
銆
RJ-45鎺ュご1銆RJ-45鎺ュご2
閽堝彿鍔熻兘銆閽堝彿鍔熻兘
1鍙戦?<-->3鎺ユ敹+
2鍙戦?<-->6鎺ユ敹-
3鎺ユ敹+<-->1鍙戦?
6鎺ユ敹-<-->2鍙戦?
涓夈侀泦綰垮櫒鐨勭被鍨?br>
鎴戜滑鐭ラ亾錛岄泦綰垮櫒鍦ㄦ槦褰㈡嫇鎵戠殑緗戠粶涓搗鐫閲嶈浣滅敤銆傞泦綰垮櫒鏈夊縐嶏紝鍚勪釜縐嶇被鍏鋒湁鐗瑰畾鐨勫姛鑳姐佹彁渚涗笉鍚岀瓑綰х殑鏈嶅姟銆備笅闈㈣璁插鏁伴泦綰垮櫒鐨勪竴浜涙爣鍑嗙壒鎬у拰琚姩銆佷富鍔ㄣ佹櫤鑳介泦綰垮櫒鐨勫尯鍒互鍙婁竴浜涢珮鎬ц兘闆嗙嚎鍣ㄧ殑闄勫姞鐗規с?br>
1銆佸熀鏈鑼?br>
鎵鏈夌殑闆嗙嚎鍣ㄦ牴鎹彲榪炴帴鐨勭嚎緙嗙被鍨嬮兘鏈変竴浜涘熀鏈壒鎬с傞泦綰垮櫒鍙互緇欑綉緇滄彁渚涢櫎鎺ュ彛涔嬪鐨勯檮鍔犳湇鍔★紝浣嗕篃蹇呴』閬典粠IEEE瀵逛粙璐ㄧ殑瑙勫畾銆?br>
澶氭暟闆嗙嚎鍣ㄤ富瑕佺殑榪炴帴鏄疪J-45鎻掑駭錛岃繖鏄熀浜庡弻緇炵嚎鐨勫縐嶄互澶綉鐨勬爣鍑嗘帴澶寸被鍨嬶紝浠?0Base-T鍒?00Base-T錛屽眬鍩熺綉涓殑宸ヤ綔绔欍佹墦鍗版満絳夎澶囬氬父鏄互鏌愮鍙岀粸綰胯繛鎺ュ埌闆嗙嚎鍣ㄧ殑錛屽叾涓ょ涓篟J-45榪炴帴澶淬?br>
娉細RJ-45澶寸湅璧鋒潵鏈夌偣璞$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>
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>
銆
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
10broad-363,600綾?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>
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>
2銆佽鍔ㄩ泦綰垮櫒
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>
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>
3銆佷富鍔ㄩ泦綰垮櫒
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>
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>
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>
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>
4銆佹櫤鑳介泦綰垮櫒
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$悊宸ュ叿錛岄偅涔堜綘甯稿父闇瑕佷竴涓竴涓嚎鐩掑湴璺戯紝瀵繪壘鍑洪棶棰樼殑璁懼銆?br>
鏅鴻兘闆嗙嚎鍣ㄧ殑鍙︿竴涓嚭鑹茬殑鐗規ф槸鍙互涓轟笉鍚岃澶囨彁渚涚伒媧葷殑浼犺緭閫熺巼銆傞櫎浜嗕笂榪炲埌楂橀熶富騫茬殑绔彛澶栵紝鏅鴻兘闆嗙嚎鍣ㄨ繕鏀寔鍒版闈㈢殑10銆?6鍜?00Mbps鐨勯熺巼錛屽嵆浠ュお緗戙佷護鐗岀幆鍜孎DDI銆?br>
5銆侀珮綰х壒鎬?br>
楂樼闆嗙嚎鍣ㄨ繕鎻愪緵鍏跺畠涓浜涚壒鎬э紝濡傚啑浣欎氦嫻佺數婧愩佸唴緗洿嫻佺數婧愩佸啑浣欓鎵囷紝榪樻湁綰跨紗榪炴帴鐨勮嚜鍔ㄤ腑鏂佹ā鍧楃殑鐑彃鎷斻佽嚜鍔ㄨ皟鏁?0Base-T鎺ュご鐨勬瀬鎬э紝鍐嶅鍐椾綑閰嶇疆瀛樿串銆佸啑浣欐椂閽燂紝鏈変簺闆嗙嚎鍣ㄨ繕闆嗘垚浜嗚礬鐢卞拰妗ユ帴鍔熻兘銆?
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涓銆佷粈涔堟槸緗戞ˉ錛?br>
緗戞ˉ宸ヤ綔鍦ㄦ暟鎹摼璺眰錛屽皢涓や釜LAN榪炶搗鏉ワ紝鏍規嵁MAC鍦板潃鏉ヨ漿鍙戝撫錛屽彲浠ョ湅浣滀竴涓?#8220;浣庡眰鐨勮礬鐢卞櫒”錛堣礬鐢卞櫒宸ヤ綔鍦ㄧ綉緇滃眰錛屾牴鎹綉緇滃湴鍧濡侷P鍦板潃榪涜杞彂錛夈?br>
銆
榪滅▼緗戞ˉ閫氳繃涓涓氬父杈冩參鐨勯摼璺紙濡傜數璇濈嚎錛夎繛鎺ヤ袱涓繙紼婰AN錛屽鏈湴緗戞ˉ鑰岃█錛屾ц兘姣旇緝閲嶈錛岃屽榪滅▼緗戞ˉ鑰岃█錛屽湪闀胯窛紱諱笂鍙甯歌繍琛屾槸鏇撮噸瑕佺殑銆?br>
緗戞ˉ涓庤礬鐢卞櫒鐨勬瘮杈?br>
緗戞ˉ騫朵笉浜嗚В鍏惰漿鍙戝撫涓珮灞傚崗璁殑淇℃伅錛岃繖浣垮畠鍙互鍚屾椂浠ュ悓縐嶅嚒鏄鐞咺P銆両PX絳夊崗璁紝瀹冭繕鎻愪緵浜嗗皢鏃犺礬鐢卞崗璁殑緗戠粶錛堝NetBEUI錛夊垎孌電殑鍔熻兘銆?br>
鐢變簬璺敱鍣ㄥ鐞嗙綉緇滃眰鐨勬暟鎹紝鍥犳瀹冧滑鏇村鏄撲簰榪炰笉鍚岀殑鏁版嵁閾捐礬灞傦紝濡備護鐗岀幆緗戞鍜屼互澶綉孌點傜綉妗ラ氬父姣旇礬鐢卞櫒闅炬帶鍒躲傝薄IP絳夊崗璁湁澶嶆潅鐨勮礬鐢卞崗璁紝浣跨綉綆℃槗浜庣鐞嗚礬鐢憋紱IP絳夊崗璁繕鎻愪緵浜嗚緝澶氱殑緗戠粶濡備綍鍒嗘鐨勪俊鎭紙鍗充嬌鍏跺湴鍧涔熸彁渚涗簡姝ょ被淇℃伅錛夈傝岀綉妗ュ垯鍙敤MAC鍦板潃鍜岀墿鐞嗘嫇鎵戣繘琛屽伐浣溿傚洜姝ょ綉妗ヤ竴鑸備簬灝忓瀷杈冪畝鍗曠殑緗戠粶銆?br>
浜屻佷嬌鐢ㄥ師鍥?br>
璁稿鍗曚綅閮芥湁澶氫釜灞鍩熺綉錛屽茍涓斿笇鏈涜兘澶熷皢瀹冧滑榪炴帴璧鋒潵銆備箣鎵浠ヤ竴涓崟浣嶆湁澶氫釜灞鍩熺綉錛屾湁浠ヤ笅6涓師鍥狅細
棣栧厛錛岃澶氬ぇ瀛︾殑緋繪垨鍏徃鐨勯儴闂ㄩ兘鏈夊悇鑷殑灞鍩熺綉錛屼富瑕佺敤浜庤繛鎺ヤ粬浠嚜宸辯殑涓漢璁$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>
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>
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>
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>
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>
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>
涓夈佸吋瀹規ч棶棰?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>
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>
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>
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>
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>
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
銆銆鐩殑LAN
銆銆802.3(CSMA/CD)802.4(浠ょ墝鎬葷嚎)802.5(浠ょ墝鐜?
婧怢AN802.3銆1,41,2,4,8
802.41,5,8,9,1091,2,3,8,9,10
802.51,2,5,6,7,101,2,3,6,76,7
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>
璁懼畾鐨勫弬鏁幫細
802.3錛?500瀛楄妭甯?0Mb/s(鍑忓幓紕版挒嬈℃暟)
802.4錛?191瀛楄妭甯?0Mb/s
802.5錛?000瀛楄妭甯?Mb/s
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>
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褰撹綆楁満鍜岀綉妗ュ姞鐢點佹柇鐢墊垨榪佺Щ鏃訛紝緗戠粶鐨勬嫇鎵戠粨鏋勪細闅忎箣鏀瑰彉銆備負浜嗗鐞嗗姩鎬佹嫇鎵戦棶棰橈紝姣忓綋澧炲姞鏁e垪琛ㄩ」鏃訛紝鍧囧湪璇ラ」涓敞鏄庡撫鐨勫埌杈炬椂闂淬傛瘡褰撶洰鐨勫湴宸插湪琛ㄤ腑鐨勫撫鍒拌揪鏃訛紝灝嗕互褰撳墠鏃墮棿鏇存柊璇ラ」銆傝繖鏍鳳紝浠庤〃涓瘡欏圭殑鏃墮棿鍗沖彲鐭ラ亾璇ユ満鍣ㄦ渶鍚庡撫鍒版潵鐨勬椂闂淬傜綉妗ヤ腑鏈変竴涓繘紼嬪畾鏈熷湴鎵弿鏁e垪琛紝娓呴櫎鏃墮棿鏃╀簬褰撳墠鏃墮棿鑻ュ共鍒嗛挓鐨勫叏閮ㄨ〃欏廣備簬鏄紝濡傛灉浠嶭AN涓婂彇涓嬩竴鍙拌綆楁満錛屽茍鍦ㄥ埆澶勯噸鏂拌繛鍒癓AN涓婄殑璇濓紝閭d箞鍦ㄥ嚑鍒嗛挓鍐咃紝瀹冨嵆鍙噸鏂板紑濮嬫甯稿伐浣滆屾棤欏諱漢宸ュ共棰勩傝繖涓畻娉曞悓鏃朵篃鎰忓懗鐫錛屽鏋滄満鍣ㄥ湪鍑犲垎閽熷唴鏃犲姩浣滐紝閭d箞鍙戠粰瀹冪殑甯у皢涓嶅緱涓嶆暎鍙戯紝涓鐩村埌瀹冭嚜宸卞彂閫佸嚭涓甯т負姝€?br>
鍒拌揪甯х殑璺敱閫夋嫨榪囩▼鍙栧喅浜庡彂閫佺殑LAN(婧怢AN)鍜岀洰鐨勫湴鎵鍦ㄧ殑LAN(鐩殑LAN)錛屽涓嬫墍紺猴細
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鐢熸垚鏍戠綉妗?br>
瑙e喅涓婇潰鎵璇寸殑鏃犻檺寰幆闂鐨勬柟娉曟槸璁╃綉妗ョ浉浜掗氫俊錛屽茍鐢ㄤ竴媯靛埌杈炬瘡涓狶AN鐨勭敓鎴愭爲瑕嗙洊瀹為檯鐨勬嫇鎵戠粨鏋勩備嬌鐢ㄧ敓鎴愭爲錛屽彲浠ョ‘淇濅換涓や釜LAN涔嬮棿鍙湁鍞竴涓鏉¤礬寰勩備竴鏃︾綉妗ュ晢瀹氬ソ鐢熸垚鏍戯紝LAN闂寸殑鎵鏈変紶閫侀兘閬典粠姝ょ敓鎴愭爲銆傜敱浜庝粠姣忎釜婧愬埌姣忎釜鐩殑鍦板彧鏈夊敮涓鐨勮礬寰勶紝鏁呬笉鍙兘鍐嶆湁寰幆銆?br>
涓轟簡寤洪犵敓鎴愭爲錛岄鍏堝繀欏婚夊嚭涓涓綉妗ヤ綔涓虹敓鎴愭爲鐨勬牴銆傚疄鐜扮殑鏂規硶鏄瘡涓綉妗ュ箍鎾叾搴忓垪鍙鳳紙璇ュ簭鍒楀彿鐢卞巶瀹惰緗茍淇濊瘉鍏ㄧ悆鍞竴錛夛紝閫夊簭鍒楀彿鏈灝忕殑緗戞ˉ浣滀負鏍廣傛帴鐫錛屾寜鏍瑰埌姣忎釜緗戞ˉ鐨勬渶鐭礬寰勬潵鏋勯犵敓鎴愭爲銆傚鏋滄煇涓綉妗ユ垨LAN鏁呴殰錛屽垯閲嶆柊璁$畻銆?br>
緗戞ˉ閫氳繃BPDU(BridgeProtocolDataUnit)浜掔浉閫氫俊錛屽湪緗戞ˉ鍋氬嚭閰嶇疆鑷繁鐨勫喅瀹氬墠錛屾瘡涓綉妗ュ拰姣忎釜绔彛闇瑕佷笅鍒楅厤緗暟鎹細
緗戞ˉ錛欼D(鍞竴鐨勬爣璇?
绔彛錛氱鍙D(鍞竴鐨勬爣璇?
绔彛鐩稿浼樺厛鏉?br>鍚勭鍙g殑鑺辮垂(楂樺甫瀹?浣庤姳璐?
閰嶇疆濂藉悇涓綉妗ュ悗錛岀綉妗ュ皢鏍規嵁閰嶇疆鍙傛暟鑷姩紜畾鐢熸垚鏍戯紝榪欎竴榪囩▼鏈変笁涓樁孌碉細
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2銆佸湪鍏跺畠鎵鏈夌綉妗ヤ笂閫夋嫨鏍圭鍙?br>闄ゆ牴緗戞ˉ澶栫殑鍚勪釜緗戞ˉ闇瑕侀変竴涓牴绔彛錛岃繖搴旇鏄渶閫傚悎涓庢牴緗戞ˉ閫氫俊鐨勭鍙c傞氳繃璁$畻鍚勪釜绔彛鍒版牴緗戞ˉ鐨勮姳璐癸紝鍙栨渶灝忚呬綔涓烘牴绔彛銆?br>
3銆侀夋嫨姣忎釜LAN鐨?#8220;鎸囧畾(designated)緗戞ˉ”鍜?#8220;鎸囧畾绔彛”
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涓涓鍙e繀欏諱負涓嬪垪涔嬩竴錛?br>
1銆佹牴绔彛
2銆佹煇LAN鐨勬寚瀹氱鍙?br>3銆侀樆濉炵鍙?br>
褰撲竴涓綉妗ュ姞鐢靛悗錛屽畠鍋囧畾鑷繁鏄牴緗戞ˉ錛屽彂閫佸嚭涓涓狢BPDU(ConfigurationBridgeProtocolDataUnit)錛屽憡鐭ュ畠璁や負鐨勬牴緗戞ˉID銆備竴涓綉妗ユ敹鍒頒竴涓牴緗戞ˉID灝忎簬鍏舵墍鐭D鐨凜BPDU錛屽畠灝嗘洿鏂拌嚜宸辯殑琛紝濡傛灉璇ュ撫浠庢牴绔彛(涓婁紶)鍒拌揪錛屽垯鍚戞墍鏈夋寚瀹氱鍙?涓嬩紶)鍒嗗彂銆傚綋涓涓綉妗ユ敹鍒頒竴涓牴緗戞ˉID澶т簬鍏舵墍鐭D鐨凜BPDU錛岃淇℃伅琚涪寮冿紝濡傛灉璇ュ撫浠庢寚瀹氱鍙e埌杈撅紝鍒欏洖閫佷竴涓撫鍛婄煡鐪熷疄鏍圭綉妗ョ殑杈冧綆ID銆?br>
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2銆佹簮璺敱閫夋嫨緗戞ˉ
閫忔槑緗戞ˉ鐨勪紭鐐規槸鏄撲簬瀹夎錛屽彧闇鎻掕繘鐢電紗鍗沖ぇ鍔熷憡鎴愩備絾鏄粠鍙︿竴鏂歸潰鏉ヨ錛岃繖縐嶇綉妗ュ茍娌℃湁鏈浣沖湴鍒╃敤甯﹀錛屽洜涓哄畠浠粎浠呯敤鍒頒簡鎷撴墤緇撴瀯鐨勪竴涓瓙闆?鐢熸垚鏍?銆傝繖涓や釜錛堟垨鍏朵粬錛夊洜绱犵殑鐩稿閲嶈鎬у鑷翠簡802濮斿憳浼氬唴閮ㄧ殑鍒嗚銆傛敮鎸丆SMA/CD鍜屼護鐗屾葷嚎鐨勪漢閫夋嫨浜嗛忔槑緗戞ˉ錛岃屼護鐗岀幆鐨勬敮鎸佽呭垯鍋忕埍涓縐嶇О涓烘簮璺敱閫夋嫨(sourcerouting)鐨勭綉妗ワ紙鍙楀埌IBM鐨勯紦鍔憋級銆?br>
婧愯礬鐢遍夋嫨鐨勬牳蹇冩濇兂鏄亣瀹氭瘡涓撫鐨勫彂閫佽呴兘鐭ラ亾鎺ユ敹鑰呮槸鍚﹀湪鍚屼竴LAN涓娿傚綋鍙戦佷竴甯у埌鍙﹀鐨凩AN鏃訛紝婧愭満鍣ㄥ皢鐩殑鍦板潃鐨勯珮浣嶈緗垚1浣滀負鏍囪銆傚彟澶栵紝瀹冭繕鍦ㄥ撫澶村姞榪涙甯у簲璧扮殑瀹為檯璺緞銆?br>
婧愯礬鐢遍夋嫨緗戞ˉ鍙叧蹇冮偅浜涚洰鐨勫湴鍧楂樹綅涓?鐨勫撫錛屽綋瑙佸埌榪欐牱鐨勫撫鏃訛紝瀹冩壂鎻忓撫澶翠腑鐨勮礬鐢憋紝瀵繪壘鍙戞潵姝ゅ撫鐨勯偅涓狶AN鐨勭紪鍙楓傚鏋滃彂鏉ユ甯х殑閭d釜LAN緙栧彿鍚庤窡鐨勬槸鏈綉妗ョ殑緙栧彿錛屽垯灝嗘甯ц漿鍙戝埌璺敱琛ㄤ腑鑷繁鍚庨潰鐨勯偅涓狶AN銆傚鏋滆LAN緙栧彿鍚庤窡鐨勪笉鏄湰緗戞ˉ錛屽垯涓嶈漿鍙戞甯с傝繖涓綆楁硶鏈?縐嶅彲鑳界殑鍏蜂綋瀹炵幇錛氳蔣浠躲佺‖浠躲佹販鍚堛傝繖涓夌鍏蜂綋瀹炵幇鐨勪環鏍煎拰鎬ц兘鍚勪笉鐩稿悓銆傜涓縐嶆病鏈夋帴鍙g‖浠跺紑閿錛屼絾闇瑕侀熷害寰堝揩鐨凜PU澶勭悊鎵鏈夊埌鏉ョ殑甯с傛渶鍚庝竴縐嶅疄鐜伴渶瑕佺壒孌婄殑 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>
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>
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>
3銆佷袱縐嶇綉妗ョ殑姣旇緝
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>
浜斻佽繙紼嬬綉妗?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>
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?
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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?
涓嶅悓鐨勫撫鏍煎紡鍙婁粬浠殑宸紓銆?
1982 DEC,Intel,Xerox鍙堝埗璁簡Ehternet II鐨勬爣鍑?
1982 IEEE寮濮嬬爺絀禘thernet鐨勫浗闄呮爣鍑?02.3
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?
1985 IEEE鎺ㄥ嚭IEEE 802.3瑙勮寖
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
涓嬮潰浠嬬粛涓涓嬪悇涓撫鏍煎紡
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?
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
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?
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)
1 byte,SSAP(Source SAP),涓涓帶鍒跺煙--1 byte!
SAP鐢ㄤ簬鏍囩ず甯х殑涓婂眰鍗忚
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?
涓?濡備綍鍖哄垎涓嶅悓鐨勫撫鏍煎紡
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?
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
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
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