Posted 娣卞叆鍘熺悊
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鐐瑰嚮馃憜钃濊壊鈥?nbsp;娣卞叆鍘熺悊鈥濓紝鍏虫敞骞垛€?/span>璁句负鏄熸爣鈥?/span>
鎶€鏈共璐э紝绗竴鏃堕棿鎺ㄩ€?/span>
1 姒傝堪
閲嶄紶瀹氭椂鍣細浣跨敤浜庡綋甯屾湜鏀跺埌鍙︿竴绔殑纭銆?/p>
鍧氭寔(persist)瀹氭椂鍣細浣跨獥鍙ｅぇ灏忎俊鎭繚鎸佷笉鏂祦鍔紝鍗充娇鍙︿竴绔叧闂簡鍏舵帴鏀剁獥鍙?/p>
淇濇椿(keepalive)瀹氭椂鍣細鐢ㄤ簬妫€娴嬩竴涓┖闂茶繛鎺ョ殑鍙︿竴绔綍鏃跺穿婧冩垨閲嶅惎銆?/p>
2MSL瀹氭椂鍣細娴嬮噺涓€涓繛鎺ュ浜嶵IME_WAIT鐘舵€佺殑鏃堕棿銆?/p>
2 閲嶄紶瀹氭椂鍣?/h3>
鐩殑锛氭彁楂楾CP鍙潬鎬э紝纭繚瀵规柟鏀跺埌锛屽苟杩斿洖ACK銆?/p>
浣滅敤锛氶噸鏂板彂閫佷涪澶辩殑鍖?/p>
閲嶄紶鏃舵満锛氳秴鏃舵椂闂达紙RTO锛?/p>
RTO鍊?/strong>锛歊TO涓嶈兘鏄浐瀹氬€硷紝闇€瑕佸弬鑰冨線杩旀椂闂达紙RTT锛?/p>
璁＄畻绠楁硶锛氱粡鍏哥畻娉曪紙SRTT绠楁硶锛夈€?Karn / Partridge 绠楁硶锛圫RTT浼樺寲绠楁硶锛夈€丣acobson / Karels 绠楁硶锛圫RTT鏀硅壇绠楁硶锛?/p>
3 鍧氭寔瀹氭椂鍣?/h3>
鐩殑锛氭粦鍔ㄧ獥鍙ｄ负0鏃讹紝Sender灏嗗仠姝㈠彂閫佹暟鎹粰Receiver銆備絾鏄疭ender闇€瑕佺煡閬揜eceiver浣曟椂鎵嶅彲浠ユ帴鍙楁柊鐨勬秷鎭紙绐楀彛鎺㈡祴鎶€鏈?/strong>锛夈€?/p>
浣滅敤锛歋ender杞闂甊eceiver鐨勬粦鍔ㄧ獥鍙ｅぇ灏忥紙闆剁獥鍙ｉ€氱煡锛夛紝浠庤€屽喅瀹氬彂閫佹秷鎭垨鍏抽棴杩炴帴銆?/p>
琛ュ厖锛歊eceiver鍙互涓嶅洖澶峉ender鑷繁鐨勬粦鍔ㄧ獥鍙ｅぇ灏忥紝杩欐牱Sender灏变細閲嶄紶璇ユ姤鏂囥€?/p>
4 淇濇椿瀹氭椂鍣?/h3>
鐩殑锛氬湪涓や釜TCP杩炴帴闂村嚭鐜伴暱鏃堕棿鐨勬病鏈変紶杈撴暟鎹殑鎯呭喌锛屽垽鏂鏂规槸鍚﹁繕娲荤潃
浣滅敤锛氫竴鑸负姣?涓皬鏃跺幓璇㈤棶瀵规柟鏄惁杩樻椿鐫€
鎯呭喌锛?/p>
瀹㈡埛涓绘満姝ｅ父杩愯涓斿彲杈撅細淇濇椿瀹氭椂鍣ㄥ浣嶃€?/p>
瀹㈡埛涓绘満宕╂簝锛氫繚娲绘帰娴嬫病鏈夊搷搴旓紝75绉掑悗瓒呮椂閲嶈瘯锛屼竴鑸噸璇?0娆★紝鏈€鍚庨兘娌℃湁鍝嶅簲鍒欏叧闂繛鎺ャ€?/p>
瀹㈡埛涓绘満宕╂簝骞堕噸鏂板惎鍔細杩欐椂鏈嶅姟鍣ㄥ皢鏀跺埌涓€涓鍏朵繚娲绘帰鏌ョ殑鍝嶅簲锛屼絾鏄繖涓搷搴旀槸涓€涓浣嶏紝浣垮緱鏈嶅姟鍣ㄧ粓姝㈣繖涓繛鎺ャ€?/p>
瀹㈡埛涓绘満姝ｅ父杩愯浣嗕笉鍙揪锛氬悓绗簩绉嶆儏鍐?/p>
5 2MSL瀹氭椂鍣?/h3>
鐩殑锛氱‘淇濆绔湁瓒冲鐨勬椂闂存敹鍒癆CK锛屽苟鎶奣CP鐘舵€佷粠TIME_WAIT => CLOSED
浣滅敤锛氫富鍔ㄥ叧闂繛鎺ユ椂锛岄渶瑕佸彂閫佸畬ACK锛屽苟瀵圭鏀跺埌ACK鏃讹紝鎵嶇畻缁撴潫銆備絾鏄彲鑳界綉缁滃師鍥犲鑷达紝瀵规柟娌℃湁鏀跺埌ACK锛屾墍浠ュ鏂归渶瑕侀噸鏂板彂閫丗IN鎶ユ枃锛岃繖杈瑰垯鍙戦€丄CK鎶ユ枃銆?span>2 * MSL鏄负浜嗕繚璇佸绔兘澶熸湁瓒冲鏃堕棿鍙戦€佷袱涓狥IN鎶ユ枃銆?/p>
MSL鍊硷紙TCP娈电殑鏈€澶у瓨娲绘椂闂达級锛氶渶瑕佸弬鑰僒TL鏃堕棿锛圛P鏁版嵁鎶ョ殑瀛樻椿鏃堕棿锛夛紝澶т簬绛変簬TTL鍗冲彲銆?/p>
6 琛ュ厖
RTT锛堝線杩旀椂闂达級锛氶噰鏍峰€硷紝涓€鑸疄鏃惰绠楋紝姣旇緝涓ユ牸
TTL锛圛P鎶ユ枃瀛樻椿鏃堕棿锛夛細鍥哄畾鍊?/p>
MSL锛圱CP娈电殑鏈€澶у瓨娲绘椂闂达級锛氬浐瀹氬€硷紝MSL >= TTL
7 鍙傝€冭祫鏂?/h3>
銆奣CP/IP鍗忚鍗蜂竴銆?/p>
https://www.cnblogs.com/Rex7/p/4752573.html
https://blog.csdn.net/hyman_yx/article/details/52086389
https://www.cnblogs.com/mfrbuaa/p/3861493.html
https://www.cnblogs.com/yjf512/p/5659316.html
-娣卞叆鍘熺悊-
鐭ュ叾鐒跺苟鐭ュ叾鎵€浠ョ劧
鐩殑锛氭彁楂楾CP鍙潬鎬э紝纭繚瀵规柟鏀跺埌锛屽苟杩斿洖ACK銆?/p>
浣滅敤锛氶噸鏂板彂閫佷涪澶辩殑鍖?/p>
閲嶄紶鏃舵満锛氳秴鏃舵椂闂达紙RTO锛?/p>
RTO鍊?/strong>锛歊TO涓嶈兘鏄浐瀹氬€硷紝闇€瑕佸弬鑰冨線杩旀椂闂达紙RTT锛?/p>
璁＄畻绠楁硶锛氱粡鍏哥畻娉曪紙SRTT绠楁硶锛夈€?Karn / Partridge 绠楁硶锛圫RTT浼樺寲绠楁硶锛夈€丣acobson / Karels 绠楁硶锛圫RTT鏀硅壇绠楁硶锛?/p>
鐩殑锛氭粦鍔ㄧ獥鍙ｄ负0鏃讹紝Sender灏嗗仠姝㈠彂閫佹暟鎹粰Receiver銆備絾鏄疭ender闇€瑕佺煡閬揜eceiver浣曟椂鎵嶅彲浠ユ帴鍙楁柊鐨勬秷鎭紙绐楀彛鎺㈡祴鎶€鏈?/strong>锛夈€?/p>
浣滅敤锛歋ender杞闂甊eceiver鐨勬粦鍔ㄧ獥鍙ｅぇ灏忥紙闆剁獥鍙ｉ€氱煡锛夛紝浠庤€屽喅瀹氬彂閫佹秷鎭垨鍏抽棴杩炴帴銆?/p>
琛ュ厖锛歊eceiver鍙互涓嶅洖澶峉ender鑷繁鐨勬粦鍔ㄧ獥鍙ｅぇ灏忥紝杩欐牱Sender灏变細閲嶄紶璇ユ姤鏂囥€?/p>
4 淇濇椿瀹氭椂鍣?/h3>
鐩殑锛氬湪涓や釜TCP杩炴帴闂村嚭鐜伴暱鏃堕棿鐨勬病鏈変紶杈撴暟鎹殑鎯呭喌锛屽垽鏂鏂规槸鍚﹁繕娲荤潃
浣滅敤锛氫竴鑸负姣?涓皬鏃跺幓璇㈤棶瀵规柟鏄惁杩樻椿鐫€
鎯呭喌锛?/p>
瀹㈡埛涓绘満姝ｅ父杩愯涓斿彲杈撅細淇濇椿瀹氭椂鍣ㄥ浣嶃€?/p>
瀹㈡埛涓绘満宕╂簝锛氫繚娲绘帰娴嬫病鏈夊搷搴旓紝75绉掑悗瓒呮椂閲嶈瘯锛屼竴鑸噸璇?0娆★紝鏈€鍚庨兘娌℃湁鍝嶅簲鍒欏叧闂繛鎺ャ€?/p>
瀹㈡埛涓绘満宕╂簝骞堕噸鏂板惎鍔細杩欐椂鏈嶅姟鍣ㄥ皢鏀跺埌涓€涓鍏朵繚娲绘帰鏌ョ殑鍝嶅簲锛屼絾鏄繖涓搷搴旀槸涓€涓浣嶏紝浣垮緱鏈嶅姟鍣ㄧ粓姝㈣繖涓繛鎺ャ€?/p>
瀹㈡埛涓绘満姝ｅ父杩愯浣嗕笉鍙揪锛氬悓绗簩绉嶆儏鍐?/p>
5 2MSL瀹氭椂鍣?/h3>
鐩殑锛氱‘淇濆绔湁瓒冲鐨勬椂闂存敹鍒癆CK锛屽苟鎶奣CP鐘舵€佷粠TIME_WAIT => CLOSED
浣滅敤锛氫富鍔ㄥ叧闂繛鎺ユ椂锛岄渶瑕佸彂閫佸畬ACK锛屽苟瀵圭鏀跺埌ACK鏃讹紝鎵嶇畻缁撴潫銆備絾鏄彲鑳界綉缁滃師鍥犲鑷达紝瀵规柟娌℃湁鏀跺埌ACK锛屾墍浠ュ鏂归渶瑕侀噸鏂板彂閫丗IN鎶ユ枃锛岃繖杈瑰垯鍙戦€丄CK鎶ユ枃銆?span>2 * MSL鏄负浜嗕繚璇佸绔兘澶熸湁瓒冲鏃堕棿鍙戦€佷袱涓狥IN鎶ユ枃銆?/p>
MSL鍊硷紙TCP娈电殑鏈€澶у瓨娲绘椂闂达級锛氶渶瑕佸弬鑰僒TL鏃堕棿锛圛P鏁版嵁鎶ョ殑瀛樻椿鏃堕棿锛夛紝澶т簬绛変簬TTL鍗冲彲銆?/p>
6 琛ュ厖
RTT锛堝線杩旀椂闂达級锛氶噰鏍峰€硷紝涓€鑸疄鏃惰绠楋紝姣旇緝涓ユ牸
TTL锛圛P鎶ユ枃瀛樻椿鏃堕棿锛夛細鍥哄畾鍊?/p>
MSL锛圱CP娈电殑鏈€澶у瓨娲绘椂闂达級锛氬浐瀹氬€硷紝MSL >= TTL
7 鍙傝€冭祫鏂?/h3>
銆奣CP/IP鍗忚鍗蜂竴銆?/p>
https://www.cnblogs.com/Rex7/p/4752573.html
https://blog.csdn.net/hyman_yx/article/details/52086389
https://www.cnblogs.com/mfrbuaa/p/3861493.html
https://www.cnblogs.com/yjf512/p/5659316.html
-娣卞叆鍘熺悊-
鐭ュ叾鐒跺苟鐭ュ叾鎵€浠ョ劧
鐩殑锛氬湪涓や釜TCP杩炴帴闂村嚭鐜伴暱鏃堕棿鐨勬病鏈変紶杈撴暟鎹殑鎯呭喌锛屽垽鏂鏂规槸鍚﹁繕娲荤潃
浣滅敤锛氫竴鑸负姣?涓皬鏃跺幓璇㈤棶瀵规柟鏄惁杩樻椿鐫€
鎯呭喌锛?/p>
瀹㈡埛涓绘満姝ｅ父杩愯涓斿彲杈撅細淇濇椿瀹氭椂鍣ㄥ浣嶃€?/p>
瀹㈡埛涓绘満宕╂簝锛氫繚娲绘帰娴嬫病鏈夊搷搴旓紝75绉掑悗瓒呮椂閲嶈瘯锛屼竴鑸噸璇?0娆★紝鏈€鍚庨兘娌℃湁鍝嶅簲鍒欏叧闂繛鎺ャ€?/p>
瀹㈡埛涓绘満宕╂簝骞堕噸鏂板惎鍔細杩欐椂鏈嶅姟鍣ㄥ皢鏀跺埌涓€涓鍏朵繚娲绘帰鏌ョ殑鍝嶅簲锛屼絾鏄繖涓搷搴旀槸涓€涓浣嶏紝浣垮緱鏈嶅姟鍣ㄧ粓姝㈣繖涓繛鎺ャ€?/p>
瀹㈡埛涓绘満姝ｅ父杩愯浣嗕笉鍙揪锛氬悓绗簩绉嶆儏鍐?/p>
鐩殑锛氱‘淇濆绔湁瓒冲鐨勬椂闂存敹鍒癆CK锛屽苟鎶奣CP鐘舵€佷粠TIME_WAIT => CLOSED
浣滅敤锛氫富鍔ㄥ叧闂繛鎺ユ椂锛岄渶瑕佸彂閫佸畬ACK锛屽苟瀵圭鏀跺埌ACK鏃讹紝鎵嶇畻缁撴潫銆備絾鏄彲鑳界綉缁滃師鍥犲鑷达紝瀵规柟娌℃湁鏀跺埌ACK锛屾墍浠ュ鏂归渶瑕侀噸鏂板彂閫丗IN鎶ユ枃锛岃繖杈瑰垯鍙戦€丄CK鎶ユ枃銆?span>2 * MSL鏄负浜嗕繚璇佸绔兘澶熸湁瓒冲鏃堕棿鍙戦€佷袱涓狥IN鎶ユ枃銆?/p>
MSL鍊硷紙TCP娈电殑鏈€澶у瓨娲绘椂闂达級锛氶渶瑕佸弬鑰僒TL鏃堕棿锛圛P鏁版嵁鎶ョ殑瀛樻椿鏃堕棿锛夛紝澶т簬绛変簬TTL鍗冲彲銆?/p>
6 琛ュ厖
RTT锛堝線杩旀椂闂达級锛氶噰鏍峰€硷紝涓€鑸疄鏃惰绠楋紝姣旇緝涓ユ牸
TTL锛圛P鎶ユ枃瀛樻椿鏃堕棿锛夛細鍥哄畾鍊?/p>
MSL锛圱CP娈电殑鏈€澶у瓨娲绘椂闂达級锛氬浐瀹氬€硷紝MSL >= TTL
7 鍙傝€冭祫鏂?/h3>
銆奣CP/IP鍗忚鍗蜂竴銆?/p>
https://www.cnblogs.com/Rex7/p/4752573.html
https://blog.csdn.net/hyman_yx/article/details/52086389
https://www.cnblogs.com/mfrbuaa/p/3861493.html
https://www.cnblogs.com/yjf512/p/5659316.html
-娣卞叆鍘熺悊-
鐭ュ叾鐒跺苟鐭ュ叾鎵€浠ョ劧
銆奣CP/IP鍗忚鍗蜂竴銆?/p>
https://www.cnblogs.com/Rex7/p/4752573.html
https://blog.csdn.net/hyman_yx/article/details/52086389
https://www.cnblogs.com/mfrbuaa/p/3861493.html
https://www.cnblogs.com/yjf512/p/5659316.html
-娣卞叆鍘熺悊-
鐭ュ叾鐒跺苟鐭ュ叾鎵€浠ョ劧
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