{"id":16564,"date":"2025-04-18T23:02:18","date_gmt":"2025-04-18T15:02:18","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/16564.html"},"modified":"2025-04-18T23:02:18","modified_gmt":"2025-04-18T15:02:18","slug":"java%e4%b8%ad%e7%9a%84tcp%e5%8d%8f%e8%ae%ae%ef%bc%88%e5%a6%82%e6%9e%9c%e6%83%b3%e7%9f%a5%e9%81%93java%e4%b8%ad%e6%9c%89%e5%85%b3tcp%e5%8d%8f%e8%ae%ae%e7%9a%84%e7%9f%a5%e8%af%86%ef%bc%8c%e9%82%a3","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/16564.html","title":{"rendered":"Java\u4e2d\u7684TCP\u534f\u8bae\uff08\u5982\u679c\u60f3\u77e5\u9053Java\u4e2d\u6709\u5173TCP\u534f\u8bae\u7684\u77e5\u8bc6\uff0c\u90a3\u4e48\u53ea\u770b\u8fd9\u4e00\u7bc7\u5c31\u8db3\u591f\u4e86\uff01\uff09\uff08\u4e0a\uff09"},"content":{"rendered":"

\u00a0 \u00a0 \u00a0 \u00a0 \u524d\u8a00：TCP\u534f\u8bae\u662f\u7f51\u7edc\u901a\u4fe1\u7684\u57fa\u7840，\u5176\u63d0\u4f9b\u53ef\u9760\u3001\u9762\u5411\u8fde\u63a5\u7684\u6570\u636e\u4f20\u8f93，\u786e\u4fdd\u6570\u636e\u5305\u6309\u5e8f\u5230\u8fbe\u4e14\u65e0\u4e22\u5931，TCP \u5e7f\u6cdb\u5e94\u7528\u4e8e\u6587\u4ef6\u4f20\u8f93\u3001\u5373\u65f6\u901a\u8baf\u548c Web \u670d\u52a1，\u662f\u6211\u4eec\u5728\u5b66\u4e60\u7f51\u7edc\u7f16\u7a0b\u7684\u91cd\u8981\u57fa\u7840\u3002<\/p>\n

\n

\"\"<\/p>\n

\u2728\u2728\u2728\u8fd9\u91cc\u662f\u79cb\u5200\u9c7c\u4e0d\u505a\u68a6\u7684BLOG<\/span><\/p>\n

\u2728\u2728\u2728\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5185\u5bb9\u53ef\u4ee5\u8bbf\u95ee\u6211\u7684\u4e3b\u9875<\/span>\u79cb\u5200\u9c7c\u4e0d\u505a\u68a6-CSDN\u535a\u5ba2<\/p>\n

\u5728\u6b63\u5f0f\u5f00\u59cb\u8bb2\u89e3\u4e4b\u524d，\u5148\u8ba9\u6211\u4eec\u770b\u4e00\u4e0b\u672c\u6587\u5927\u81f4\u7684\u8bb2\u89e3\u5185\u5bb9：<\/span><\/p>\n

\"\"<\/p>\n

\n

\u76ee\u5f55<\/p>\n

1.TCP \u5934\u90e8\u7ec4\u6210<\/p>\n

1. \u6e90\u7aef\u53e3\u53f7<\/p>\n

2. \u76ee\u7684\u7aef\u53e3\u53f7<\/p>\n

3. \u5e8f\u5217\u53f7<\/p>\n

4. \u786e\u8ba4\u53f7<\/p>\n

5. \u6570\u636e\u504f\u79fb<\/p>\n

6. \u4fdd\u7559\u4f4d<\/p>\n

7. \u6807\u5fd7\u4f4d<\/p>\n

8. \u7a97\u53e3\u5927\u5c0f<\/p>\n

9. \u6821\u9a8c\u548c<\/p>\n

10. \u7d27\u6025\u6307\u9488<\/p>\n

11. \u53ef\u9009\u5b57\u6bb5<\/p>\n

12. \u6570\u636e\u90e8\u5206<\/p>\n

2.TCP\u7684\u53ef\u9760\u4f20\u8f93\u673a\u5236<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 （1）\u786e\u8ba4\u5e94\u7b54（ACK）<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 （2）\u5e8f\u5217\u53f7\u53bb\u91cd<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 （3）\u8d85\u65f6\u91cd\u4f20<\/p>\n

3.TCP\u8fde\u63a5\u7ba1\u7406<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 （1）\u4e09\u6b21\u63e1\u624b<\/p>\n

\u30101\u3011\u5ba2\u6237\u7aef\u53d1\u9001 SYN \u8bf7\u6c42<\/p>\n

\u30102\u3011\u670d\u52a1\u5668\u8fd4\u56de SYN-ACK<\/p>\n

\u30103\u3011\u5ba2\u6237\u7aef\u53d1\u9001 ACK，\u8fde\u63a5\u5efa\u7acb<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 （2）\u56db\u6b21\u6325\u624b<\/p>\n

\u30101\u3011\u5ba2\u6237\u7aef\u53d1\u9001 FIN \u5173\u95ed\u8bf7\u6c42<\/p>\n

\u30102\u3011\u670d\u52a1\u5668\u8fd4\u56de ACK<\/p>\n

\u30103\u3011\u670d\u52a1\u5668\u53d1\u9001 FIN \u5173\u95ed\u8bf7\u6c42<\/p>\n

\u30104\u3011\u5ba2\u6237\u7aef\u8fd4\u56de ACK，\u8fde\u63a5\u5173\u95ed<\/p>\n

\n<\/p>\n

1.TCP \u5934\u90e8\u7ec4\u6210<\/span><\/h2>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0TCP\u5168\u79f0\u4e3a "\u4f20\u8f93\u63a7\u5236\u534f\u8bae(Transmission Control Protocol")，\u4eba\u5982\u5176\u540d，\u5176\u662f\u8981\u5bf9\u6570\u636e\u7684\u4f20\u8f93\u8fdb\u884c\u4e00\u4e2a\u8be6\u7ec6\u7684\u63a7\u5236<\/span>，\u90a3\u4e48TCP\u534f\u8bae\u7684\u6784\u6210\u662f\u4ec0\u4e48\u6837\u7684\u5462？<\/p>\n

TCP\u534f\u8bae\u683c\u5f0f：<\/span><\/p>\n

\"\"<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0TCP\u6700\u5c0f\u957f\u5ea6\u4e3a 20 \u5b57\u8282，\u5982\u679c\u5305\u542b\u53ef\u9009\u5b57\u6bb5，\u6700\u5927\u53ef\u8fbe 60 \u5b57\u8282，\u8fd9\u91cc\u6211\u4eec\u5bf9\u4e0a\u8ff0\u7684\u6bcf\u4e2a\u7ec4\u6210\u8fdb\u884c\u4e00\u4e2a\u7b80\u5355\u7684\u603b\u62ec：<\/p>\n\n\u5b57\u8282\u504f\u79fb\u5b57\u6bb5\u540d\u79f0\u957f\u5ea6（\u6bd4\u7279）\u7b80\u5355\u8bf4\u660e<\/tr>\n0-15\u6e90\u7aef\u53e3\u53f7<\/span>16\u53d1\u9001\u65b9\u7684\u7aef\u53e3\u53f7<\/span><\/tr>\n\n\n\n\n\n\n\n\n\n\n\n\n
16-31<\/td>\n\u76ee\u7684\u7aef\u53e3\u53f7<\/span><\/td>\n16<\/td>\n\u63a5\u6536\u65b9\u7684\u7aef\u53e3\u53f7<\/span><\/td>\n<\/tr>\n
32-63<\/td>\n\u5e8f\u5217\u53f7<\/span><\/td>\n32<\/td>\n\u6570\u636e\u5305\u7684\u5e8f\u53f7<\/span><\/td>\n<\/tr>\n
64-95<\/td>\n\u786e\u8ba4\u53f7<\/span><\/td>\n32<\/td>\n\u7528\u4e8e\u786e\u8ba4\u7684\u5e8f\u5217\u53f7<\/span><\/td>\n<\/tr>\n
96-99<\/td>\n\u6570\u636e\u504f\u79fb（\u5934\u90e8\u957f\u5ea6）<\/span><\/td>\n4<\/td>\n\u4ee5 4 \u5b57\u8282\u4e3a\u4e00\u4e2a\u5355\u4f4d，\u6700\u5927\u503c\u4e3a 15（\u5373 60 \u5b57\u8282）<\/span><\/td>\n<\/tr>\n
100-102<\/td>\n\u4fdd\u7559\u4f4d<\/span><\/td>\n3<\/td>\n\u4fdd\u7559\u4f4d\u7f6e，\u503c\u4e3a 0<\/span><\/td>\n<\/tr>\n
103-111<\/td>\n\u6807\u5fd7\u4f4d<\/span><\/td>\n9<\/td>\nSYN\u3001ACK\u3001FIN \u7b49\u63a7\u5236\u8fde\u63a5<\/span><\/td>\n<\/tr>\n
112-127<\/td>\n\u7a97\u53e3\u5927\u5c0f<\/span><\/td>\n16<\/td>\n\u5141\u8bb8\u7684\u63a5\u6536\u7a97\u53e3<\/span><\/td>\n<\/tr>\n
128-143<\/td>\n\u6821\u9a8c\u548c<\/span><\/td>\n16<\/td>\n\u7528\u4e8e\u786e\u4fdd\u6570\u636e\u6b63\u786e\u6027\u548c\u5b8c\u6574\u6027<\/span><\/td>\n<\/tr>\n
144-159<\/td>\n\u7d27\u6025\u6307\u9488<\/span><\/td>\n16<\/td>\n\u7d27\u6025\u6570\u636e\u6307\u9488<\/span><\/td>\n<\/tr>\n
160-\u2026<\/td>\n\u53ef\u9009\u5b57\u6bb5<\/span><\/td>\n0-40 \u5b57\u8282<\/td>\n\u53ef\u80fd\u5305\u62ec MSS\u3001\u7a97\u53e3\u7f29\u653e\u7b49<\/span><\/td>\n<\/tr>\n
\u2026-\u2026<\/td>\n\u6570\u636e<\/span><\/td>\n\u4e0d\u56fa\u5b9a<\/td>\n\u4f20\u8f93\u7684\u6570\u636e<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u2014\u2014\u901a\u8fc7\u4e0a\u8fb9\u7684\u8868\u683c\u5185\u5bb9，\u6211\u4eec\u5c31\u5927\u81f4\u4e86\u89e3\u4e86TCP\u7684\u5934\u90e8\u7ec4\u6210\u90fd\u6709\u54ea\u4e9b\u4e86，\u73b0\u5728\u8ba9\u6211\u4eec\u9010\u4e2a\u8fdb\u884c\u8bb2\u89e3\u4e00\u4e0b：<\/p>\n

1. \u6e90\u7aef\u53e3\u53f7<\/span><\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u7528\u4e8e\u8868\u793a\u53d1\u9001\u65b9\u7684\u7aef\u53e3\u53f7，\u786e\u5b9a\u6570\u636e\u4ece\u54ea\u4e2a\u7aef\u53e3\u53d1\u9001，\u5c31\u50cf\u5bc4\u4ef6\u4eba\u7684\u5730\u5740，\u8868\u793a\u5305\u88f9\u662f\u4ece\u54ea\u4e2a\u5730\u65b9\u53d1\u9001\u7684\u3002<\/p>\n

2. \u76ee\u7684\u7aef\u53e3\u53f7<\/span><\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u7528\u4e8e\u8868\u793a\u63a5\u6536\u65b9\u7684\u7aef\u53e3\u53f7，\u786e\u5b9a\u6570\u636e\u8981\u53d1\u5f80\u7684\u7aef\u53e3，\u7c7b\u4f3c\u6536\u4ef6\u4eba\u7684\u5730\u5740，\u8868\u793a\u5305\u88f9\u8981\u53d1\u9001\u5230\u54ea\u91cc\u3002<\/p>\n

3. \u5e8f\u5217\u53f7<\/span><\/h4>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6807\u8bc6\u5f53\u524d\u6570\u636e\u6bb5\u7684\u8d77\u59cb\u5b57\u8282\u5e8f\u53f7，\u786e\u4fdd\u6570\u636e\u6309\u5e8f\u5230\u8fbe，TCP \u8fde\u63a5\u5efa\u7acb\u65f6，\u5e8f\u5217\u53f7\u7531\u53d1\u9001\u65b9\u968f\u673a\u751f\u6210，\u5176\u5c31\u76f8\u5f53\u4e8e\u6570\u636e\u7684\u7f16\u53f7，\u7528\u4e8e\u4fdd\u8bc1\u6570\u636e\u5305\u7684\u987a\u5e8f，\u5982\u679c\u6570\u636e\u88ab\u5206\u6210\u591a\u4efd，\u90a3\u4e48\u8fd9\u4e2a\u7f16\u53f7\u80fd\u5e2e\u63a5\u6536\u65b9\u6309\u987a\u5e8f\u62fc\u8d77\u6765\u3002<\/p>\n

4. \u786e\u8ba4\u53f7<\/span><\/h4>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7528\u4e8e\u786e\u8ba4\u6536\u5230\u7684\u6570\u636e，\u8868\u793a\u63a5\u6536\u65b9\u671f\u671b\u63a5\u6536\u7684\u4e0b\u4e00\u4e2a\u5b57\u8282\u5e8f\u53f7，\u7528\u4e8e\u5bf9\u6570\u636e\u8fdb\u884c\u786e\u8ba4\u64cd\u4f5c，\u4ec5\u5f53 ACK \u6807\u5fd7\u4f4d\u4e3a 1 \u65f6\u6709\u6548，\u8fd9\u5c31\u7c7b\u4f3c\u5feb\u9012\u7684\u7b7e\u6536\u5355，\u8868\u793a\u4e1c\u897f\u5df2\u7ecf\u88ab\u7b7e\u6536\u4e86\u4e00\u6837\u3002<\/p>\n

5. \u6570\u636e\u504f\u79fb<\/span><\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u7528\u4e8e\u6307\u793a TCP \u5934\u90e8\u7684\u957f\u5ea6，\u4ee54\u5b57\u8282\u4e3a\u5355\u4f4d，\u4f8b\u5982\u503c\u4e3a 5，\u90a3\u4e48\u5934\u90e8\u957f\u5ea6\u4e3a 5 \u00d7 4 = 20 \u5b57\u8282<\/p>\n

6. \u4fdd\u7559\u4f4d<\/span><\/h4>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4fdd\u7559\u5b57\u6bb5，\u5f53\u524d\u672a\u4f7f\u7528，\u5fc5\u987b\u586b 0\u3002<\/p>\n

7. \u6807\u5fd7\u4f4d<\/span><\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u7528\u4e8e\u63a7\u5236 TCP \u8fde\u63a5\u72b6\u6001，\u5176\u4e2d\u5305\u62ec<\/p>\n

    \n
  • \n

    SYN（\u540c\u6b65）\u2014\u2014\u5efa\u7acb\u8fde\u63a5（\u63e1\u624b）\u3002<\/span><\/p>\n<\/li>\n

  • \n

    ACK（\u786e\u8ba4）\u2014\u2014\u786e\u8ba4\u6536\u5230\u6570\u636e\u3002<\/span><\/p>\n<\/li>\n

  • \n

    FIN（\u7ec8\u6b62）\u2014\u2014\u5173\u95ed\u8fde\u63a5\u3002<\/span><\/p>\n<\/li>\n

  • \n

    RST（\u590d\u4f4d）\u2014\u2014\u5f02\u5e38\u7ec8\u6b62\u8fde\u63a5\u3002<\/span><\/p>\n<\/li>\n

  • \n

    PSH（\u63a8\u9001）\u2014\u2014\u7acb\u5373\u53d1\u9001\u6570\u636e\u3002<\/span><\/p>\n<\/li>\n

  • \n

    URG（\u7d27\u6025）\u2014\u2014\u6570\u636e\u7d27\u6025\u5904\u7406\u3002<\/span><\/p>\n<\/li>\n

  • \n

    ECE\/CWR\/NS\u2014\u2014\u7528\u4e8e\u62e5\u585e\u63a7\u5236\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n

    8. \u7a97\u53e3\u5927\u5c0f<\/span><\/h4>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8868\u793a\u63a5\u6536\u65b9\u80fd\u63a5\u6536\u7684\u6700\u5927\u5b57\u8282\u6570，\u7528\u4e8e\u6d41\u91cf\u63a7\u5236，\u8fd9\u5c31\u597d\u6bd4\u50cf\u544a\u8bc9\u53d1\u9001\u65b9：\u201c\u6211\u4e00\u6b21\u6700\u591a\u80fd\u63a5\u6536\u591a\u5c11\u6570\u636e\u201d，\u5982\u679c\u592a\u591a，\u5c31\u53ef\u80fd\u4f1a\u6ea2\u51fa\u3002<\/p>\n

    9. \u6821\u9a8c\u548c<\/span><\/h4>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7528\u4e8e\u68c0\u6d4b TCP \u5934\u90e8\u548c\u6570\u636e\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u7684\u9519\u8bef，\u53d1\u9001\u65b9\u8ba1\u7b97\u5e76\u586b\u5145，\u63a5\u6536\u65b9\u6821\u9a8c，\u5c31\u50cf\u5feb\u9012\u9632\u4f2a\u7801\u4e00\u6837\u3002<\/p>\n

    10. \u7d27\u6025\u6307\u9488<\/span><\/h4>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4ec5\u5728 URG \u6807\u5fd7\u4f4d\u4e3a 1 \u65f6\u751f\u6548，\u8868\u793a\u7d27\u6025\u6570\u636e\u7684\u504f\u79fb\u91cf\u3002<\/p>\n

    11. \u53ef\u9009\u5b57\u6bb5<\/span><\/h4>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5305\u542b\u6700\u5927\u6bb5\u5927\u5c0f\u3001\u7a97\u53e3\u7f29\u653e\u7b49\u9009\u9879，\u7528\u4e8e\u6269\u5c55 TCP \u529f\u80fd\u3002<\/p>\n

    12. \u6570\u636e\u90e8\u5206<\/span><\/h4>\n

    \u00a0 \u00a0 \u00a0 \u00a0 \u5176\u8868\u793a\u7684\u662fTCP\u5934\u90e8\u540e\u9762\u7684\u6570\u636e\u90e8\u5206\u3002<\/p>\n

    \u00a0 \u00a0 \u00a0 \u00a0 \u2014\u2014\u81f3\u6b64\u6211\u4eec\u5c31\u4e86\u89e3\u4e86TCP\u5934\u90e8\u7ec4\u6210\u7684\u6240\u6709\u5185\u5bb9\u4e86！！！<\/p>\n<\/p>\n

    2.TCP\u7684\u53ef\u9760\u4f20\u8f93\u673a\u5236<\/span><\/h2>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e3a\u4e86\u786e\u4fdd\u6570\u636e\u80fd\u591f\u53ef\u9760\u5730\u4f20\u9001\u5230\u63a5\u6536\u65b9，TCP\u91c7\u7528\u4e86\u786e\u8ba4\u5e94\u7b54（ACK）\u3001\u5e8f\u5217\u53f7\u53bb\u91cd \u548c <\/span>\u8d85\u65f6\u91cd\u4f20\u673a\u5236<\/span>，\u4e0b\u9762\u6211\u4eec\u9010\u4e00\u91cd\u70b9\u8bb2\u89e3\u8fd9\u4e09\u4e2a\u673a\u5236\u3002<\/p>\n

    \u00a0 \u00a0 \u00a0 \u00a0 （1）\u786e\u8ba4\u5e94\u7b54（ACK）<\/span><\/h3>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u786e\u8ba4\u5e94\u7b54（ACK） \u662f TCP \u4e2d\u5b9e\u73b0\u53ef\u9760\u4f20\u8f93\u7684\u6838\u5fc3\u673a\u5236\u4e4b\u4e00，\u5176\u4e3b\u8981\u4f5c\u7528\u662f\u786e\u4fdd\u53d1\u9001\u7684\u6570\u636e\u5305\u80fd\u591f\u6210\u529f\u5230\u8fbe\u63a5\u6536\u65b9，\u5e76\u4e14\u63a5\u6536\u65b9\u80fd\u591f\u53ca\u65f6\u544a\u77e5\u53d1\u9001\u65b9\u662f\u5426\u6210\u529f\u6536\u5230\u6570\u636e\u3002<\/span><\/p>\n

    \"\"<\/p>\n

    \u5de5\u4f5c\u539f\u7406：<\/p>\n

      \n
    • \n

      \u6bcf\u4e2a\u6570\u636e\u5305\u90fd\u9700\u8981\u786e\u8ba4：\u5f53\u53d1\u9001\u65b9\u53d1\u9001\u6570\u636e\u5305\u65f6，\u5b83\u4f1a\u7b49\u5f85\u63a5\u6536\u65b9\u7684\u786e\u8ba4\u5e94\u7b54（ACK），\u63a5\u6536\u65b9\u6536\u5230\u6570\u636e\u5305\u540e，\u4f1a\u5411\u53d1\u9001\u65b9\u8fd4\u56de\u4e00\u4e2a ACK \u5305，\u8868\u793a\u5df2\u7ecf\u786e\u8ba4\u6536\u5230\u4e86\u53d1\u9001\u8fc7\u6765\u7684\u6570\u636e\u5305\u3002<\/p>\n<\/li>\n

    • \n

      ACK\u7684\u5185\u5bb9：ACK \u5305\u4e2d\u5305\u542b\u7684\u662f\u8981\u63a5\u6536\u5230\u6570\u636e\u5305\u7684\u4e0b\u4e00\u4e2a\u671f\u671b\u7684\u5e8f\u5217\u53f7（\u5373\u786e\u8ba4\u53f7），\u8fd9\u610f\u5473\u7740\u63a5\u6536\u65b9\u5df2\u7ecf\u6210\u529f\u63a5\u6536\u4e86\u7ed9i\u5e8f\u5217\u53f7\u4e4b\u524d\u7684\u6240\u6709\u6570\u636e\u5305\u3002<\/p>\n<\/li>\n

    • \n

      \u987a\u5e8f\u4fdd\u8bc1：\u63a5\u6536\u65b9\u6bcf\u6b21\u786e\u8ba4\u7684\u662f\u6700\u5c0f\u672a\u63a5\u6536\u7684\u6570\u636e\u5305\u7684\u5e8f\u5217\u53f7，\u8fd9\u610f\u5473\u7740\u901a\u8fc7\u5e8f\u5217\u53f7\u7684\u786e\u8ba4，\u53d1\u9001\u65b9\u77e5\u9053\u54ea\u4e9b\u6570\u636e\u5305\u5df2\u7ecf\u6210\u529f\u5230\u8fbe，\u54ea\u4e9b\u4ecd\u672a\u5230\u8fbe\u3002<\/p>\n<\/li>\n<\/ul>\n

      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u786e\u8ba4\u5e94\u7b54\u5c31\u597d\u6bd4\u53d1\u9001\u65b9\u53d1\u9001\u4e86\u6570\u636e\u53051\u30012\u30013\u30014，\u63a5\u6536\u65b9\u6536\u5230\u6570\u636e\u53051\u30012\u540e，\u4f1a\u53d1\u9001\u4e00\u4e2a\u786e\u8ba4\u5e94\u7b54 ACK(3)，\u8868\u793a\u5b83\u5df2\u7ecf\u6536\u5230\u5e8f\u5217\u53f7\u5c0f\u4e8e3\u7684\u6570\u636e\u5305，\u671f\u671b\u6536\u5230\u5e8f\u5217\u53f7\u4e3a3\u7684\u6570\u636e\u5305\u3002<\/p>\n

      \u00a0 \u00a0 \u00a0 \u00a0 \u8fd9\u6837\u6211\u4eec\u5c31\u4e86\u89e3\u4e86TCP\u7684\u53ef\u9760\u4f20\u8f93\u673a\u5236\u7684\u786e\u8ba4\u5e94\u7b54（ACK）\u673a\u5236\u4e86\u3002<\/span><\/p>\n<\/p>\n

      \u00a0 \u00a0 \u00a0 \u00a0 <\/span>（2）\u5e8f\u5217\u53f7\u53bb\u91cd<\/span><\/h3>\n

      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5e8f\u5217\u53f7\u53bb\u91cd\u662f\u7528\u6765\u5904\u7406\u6570\u636e\u5305\u4e71\u5e8f\u548c\u91cd\u590d\u53d1\u9001\u95ee\u9898\u7684，\u5f53\u7f51\u7edc\u4e0d\u7a33\u5b9a\u6216\u8def\u7531\u6539\u53d8\u7b49\u539f\u56e0，\u6570\u636e\u5305\u53ef\u80fd\u4f1a\u4e71\u5e8f\u5230\u8fbe\u63a5\u6536\u65b9，\u751a\u81f3\u53ef\u80fd\u51fa\u73b0\u91cd\u590d\u6570\u636e\u5305\u7684\u95ee\u9898\u3002<\/span><\/p>\n

      \u5176\u5de5\u4f5c\u539f\u7406：<\/p>\n

        \n
      • \n

        \u5e8f\u5217\u53f7\u7684\u5206\u914d：\u6bcf\u4e2a\u6570\u636e\u5305\u90fd\u88ab\u5206\u914d\u4e00\u4e2a\u552f\u4e00\u7684\u5e8f\u5217\u53f7，\u8fd9\u4e2a\u5e8f\u5217\u53f7\u7528\u4e8e\u6807\u8bc6\u6570\u636e\u5305\u7684\u987a\u5e8f，\u5f53\u63a5\u6536\u65b9\u63a5\u6536\u5230\u6570\u636e\u5305\u65f6，\u5b83\u4f1a\u6839\u636e\u5e8f\u5217\u53f7\u6765\u51b3\u5b9a\u6570\u636e\u5305\u7684\u987a\u5e8f，\u786e\u4fdd\u6570\u636e\u7684\u6b63\u786e\u63a5\u6536\u3002<\/p>\n<\/li>\n

      • \n

        \u4e71\u5e8f\u5904\u7406：\u5f53\u6570\u636e\u5305\u4e71\u5e8f\u5230\u8fbe\u65f6，\u63a5\u6536\u65b9\u53ef\u4ee5\u6839\u636e\u5e8f\u5217\u53f7\u5c06\u5b83\u4eec\u91cd\u65b0\u6392\u5e8f，\u4fdd\u8bc1\u6570\u636e\u6309\u6b63\u786e\u7684<\/p>\n<\/li>\n

      • \n

        \u91cd\u590d\u5305\u7684\u4e22\u5f03：\u5982\u679c\u63a5\u6536\u65b9\u6536\u5230\u76f8\u540c\u5e8f\u5217\u53f7\u7684\u5305，\u90a3\u4e48\u5b83\u5c31\u4f1a\u4e22\u5f03\u8be5\u5305，\u63a5\u6536\u65b9\u53ea\u4f1a\u5411\u53d1\u9001\u65b9\u786e\u8ba4\u65b0\u7684\u6570\u636e\u5305\u3002<\/p>\n<\/li>\n<\/ul>\n

        \u00a0 \u00a0 \u00a0 \u00a0 \u4ece\u4e0a\u9762\u7684\u5de5\u4f5c\u539f\u7406\u4e2d\u6211\u4eec\u53ef\u4ee5\u770b\u51fa，\u5e8f\u5217\u53f7\u53bb\u91cd\u7684\u64cd\u4f5c\u786e\u4fdd\u4e86\u6570\u636e\u7684\u987a\u5e8f\u6027，\u5373\u4f7f\u6570\u636e\u5305\u4e71\u5e8f\u5230\u8fbe，\u63a5\u6536\u65b9\u4e5f\u80fd\u6309\u7167\u5e8f\u5217\u53f7\u6b63\u786e\u5730\u6392\u5e8f，\u5e76\u4e14\u901a\u8fc7\u5e8f\u5217\u53f7，\u63a5\u6536\u65b9\u80fd\u8bc6\u522b\u91cd\u590d\u7684\u6570\u636e\u5305<\/p>\n

        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8fd9\u6837\u6211\u4eec\u5c31\u4e86\u89e3\u4e86TCP\u7684\u53ef\u9760\u4f20\u8f93\u673a\u5236\u7684<\/span>\u5e8f\u5217\u53f7\u53bb\u91cd\u673a\u5236\u4e86\u3002<\/span><\/p>\n<\/p>\n

        \u00a0 \u00a0 \u00a0 \u00a0 （3）\u8d85\u65f6\u91cd\u4f20<\/span><\/h3>\n

        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8d85\u65f6\u91cd\u4f20\u5b83\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u5728\u6570\u636e\u4e22\u5931\u6216\u7f51\u7edc\u5ef6\u8fdf\u8f83\u9ad8\u7684\u60c5\u51b5\u4e0b，\u786e\u4fdd\u6570\u636e\u6700\u7ec8\u80fd\u591f\u5230\u8fbe\u63a5\u6536\u65b9\u3002<\/span><\/p>\n

        \"\"<\/p>\n

        \u5de5\u4f5c\u539f\u7406：<\/p>\n

          \n
        • \n

          \u53d1\u9001\u6570\u636e\u5e76\u7b49\u5f85 ACK：\u53d1\u9001\u65b9\u53d1\u9001\u6570\u636e\u5305\u540e，\u4f1a\u542f\u52a8\u4e00\u4e2a\u5b9a\u65f6\u5668，\u5f00\u59cb\u8ba1\u65f6，\u7b49\u5f85\u63a5\u6536\u65b9\u7684 ACK \u786e\u8ba4\u3002<\/p>\n<\/li>\n

        • \n

          \u8d85\u65f6\u5224\u65ad：\u5982\u679c\u5728\u8bbe\u5b9a\u7684\u8d85\u65f6\u503c\u5185，\u53d1\u9001\u65b9\u6ca1\u6709\u6536\u5230 ACK，\u5b83\u5c31\u4f1a\u8ba4\u4e3a\u6570\u636e\u5305\u4e22\u5931，\u5e76\u91cd\u65b0\u53d1\u9001\u8be5\u6570\u636e\u5305\u3002<\/p>\n<\/li>\n<\/ul>\n

          \u00a0 \u00a0 \u00a0 \u00a0 \u4ece\u4e0a\u9762\u7684\u4ecb\u7ecd\u4e2d\u6211\u4eec\u53ef\u4ee5\u53d1\u73b0，\u5728\u6570\u636e\u5305\u4e22\u5931\u6216\u7f51\u7edc\u5ef6\u8fdf\u60c5\u51b5\u4e0b，\u53d1\u9001\u53d1\u80fd\u591f\u91cd\u65b0\u53d1\u9001\u6570\u636e\u5305，\u4ece\u800c\u4fdd\u8bc1\u6570\u636e\u6700\u7ec8\u5230\u8fbe\u63a5\u6536\u65b9\u3002<\/p>\n

          \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8fd9\u6837\u6211\u4eec\u5c31\u4e86\u89e3\u4e86TCP\u7684\u53ef\u9760\u4f20\u8f93\u673a\u5236\u7684\u8d85\u65f6\u91cd\u4f20<\/span>\u673a\u5236\u4e86\u3002<\/span><\/p>\n<\/p>\n

          \u00a0 \u00a0 \u00a0 \u00a0 \u2014\u2014\u90a3\u4e48\u5b66\u4e60\u5b8c\u4e86\u4e0a\u8ff0\u7684\u53ef\u9760\u4f20\u8f93\u7684\u4e09\u4e2a\u673a\u5236\u4e4b\u540e，\u63a5\u4e0b\u6765\u8ba9\u6211\u4eec\u5b66\u4e60\u4e00\u4e0bTCP\u4e2d\u6709\u5173\u8fde\u63a5\u7ba1\u7406\u7684\u77e5\u8bc6\u3002<\/span><\/p>\n<\/p>\n

          3.TCP\u8fde\u63a5\u7ba1\u7406<\/span><\/h2>\n

          \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u5728\u8ba1\u7b97\u673a\u7f51\u7edc\u4e2d，TCP\u91c7\u7528\u4e09\u6b21\u63e1\u624b<\/span>\u8fdb\u884c\u8fde\u63a5\u5efa\u7acb，\u5e76\u4f7f\u7528\u56db\u6b21\u6325\u624b<\/span>\u8fdb\u884c\u8fde\u63a5\u5173\u95ed，\u90a3\u4e48\u4ec0\u4e48\u662f\u4e09\u6b21\u63e1\u624b，\u4ec0\u4e48\u53c8\u662f\u56db\u6b21\u6325\u624b\u5462？<\/p>\n

          \u00a0 \u00a0 \u00a0 \u00a0 （1）\u4e09\u6b21\u63e1\u624b<\/span><\/h3>\n

          \u00a0 \u00a0 \u00a0 \u00a0 \u2014\u2014TCP \u8fde\u63a5\u7684\u5efa\u7acb\u9700\u8981\u4e09\u6b21\u4ea4\u4e92，\u786e\u4fdd\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u90fd\u51c6\u5907\u5c31\u7eea，\u5e76\u540c\u6b65\u5f7c\u6b64\u7684\u521d\u59cb\u5e8f\u5217\u53f7，\u4ee5\u4e0b\u662f\u5176\u7b80\u7565\u7684\u6b65\u9aa4：<\/p>\n

          \"\"<\/p>\n

          \u30101\u3011\u5ba2\u6237\u7aef\u53d1\u9001 SYN \u8bf7\u6c42<\/span><\/h4>\n

          \u00a0 \u00a0 \u00a0 \u00a0 \u2014\u2014\u5ba2\u6237\u7aef\u5411\u670d\u52a1\u5668\u53d1\u9001\u4e00\u4e2a SYN\u62a5\u6587，\u8868\u660e\u81ea\u5df1\u8981\u5efa\u7acb\u8fde\u63a5，\u5e76\u5e26\u4e0a\u4e00\u4e2a\u521d\u59cb\u5e8f\u5217\u53f7<\/p>\n<\/p>\n

          \u30102\u3011\u670d\u52a1\u5668\u8fd4\u56de SYN-ACK<\/span><\/h4>\n

          \u00a0 \u00a0 \u00a0 \u00a0 \u2014\u2014\u670d\u52a1\u5668\u6536\u5230 SYN \u540e，\u5982\u679c\u540c\u610f\u5efa\u7acb\u8fde\u63a5，\u4f1a\u8fd4\u56de SYN-ACK \u62a5\u6587，\u5176\u4e2d：<\/p>\n

            \n
          • \n

            SYN \u8868\u793a\u540c\u610f\u5efa\u7acb\u8fde\u63a5\u3002<\/p>\n<\/li>\n

          • \n

            ACK（Acknowledgment）\u8868\u793a\u786e\u8ba4\u5ba2\u6237\u7aef\u7684 SYN\u3002<\/p>\n<\/li>\n<\/ul>\n

            \u30103\u3011\u5ba2\u6237\u7aef\u53d1\u9001 ACK，\u8fde\u63a5\u5efa\u7acb<\/span><\/h4>\n

            \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u2014\u2014\u5ba2\u6237\u7aef\u6536\u5230 SYN-ACK \u4e4b\u540e，\u5411\u670d\u52a1\u5668\u53d1\u9001 ACK（\u786e\u8ba4）\u62a5\u6587\u3002<\/p>\n

            \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8fd9\u6837\u6211\u4eec\u5c31\u5927\u81f4\u7684\u4e86\u89e3\u4e86\u4e09\u6b21\u63e1\u624b\u7684\u6d41\u7a0b\u4e86！！！<\/p>\n<\/p>\n

            \u00a0 \u00a0 \u00a0 \u00a0 （2）\u56db\u6b21\u6325\u624b<\/span><\/h3>\n

            \u00a0 \u00a0 \u00a0 \u00a0 \u2014\u2014TCP \u8fde\u63a5\u7684\u5173\u95ed\u9700\u8981\u56db\u6b21\u4ea4\u4e92，\u786e\u4fdd\u53cc\u65b9\u90fd\u6b63\u786e\u91ca\u653e\u8d44\u6e90，\u9632\u6b62\u6570\u636e\u4e22\u5931，\u4ee5\u4e0b\u662f\u5176\u7b80\u7565\u7684\u6b65\u9aa4：<\/p>\n

            \"\"<\/p>\n

            \u30101\u3011\u5ba2\u6237\u7aef\u53d1\u9001 FIN \u5173\u95ed\u8bf7\u6c42<\/span><\/h4>\n

            \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u2014\u2014\u5f53\u5ba2\u6237\u7aef\u4e0d\u518d\u9700\u8981\u901a\u4fe1\u65f6，\u4f1a\u53d1\u9001 FIN（Finish） \u62a5\u6587<\/p>\n<\/p>\n

            \u30102\u3011\u670d\u52a1\u5668\u8fd4\u56de ACK<\/span><\/h4>\n

            \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u2014\u2014\u670d\u52a1\u5668\u6536\u5230 FIN \u540e，\u4f1a\u53d1\u9001\u4e00\u4e2a ACK \u786e\u8ba4\u62a5\u6587<\/p>\n<\/p>\n

            \u30103\u3011\u670d\u52a1\u5668\u53d1\u9001 FIN \u5173\u95ed\u8bf7\u6c42<\/span><\/h4>\n

            \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u2014\u2014\u670d\u52a1\u5668\u5904\u7406\u5b8c\u5269\u4f59\u6570\u636e\u540e，\u4e5f\u53d1\u9001 FIN \u62a5\u6587，\u901a\u77e5\u5ba2\u6237\u7aef\u53ef\u4ee5\u5173\u95ed<\/p>\n<\/p>\n

            \u30104\u3011\u5ba2\u6237\u7aef\u8fd4\u56de ACK，\u8fde\u63a5\u5173\u95ed<\/span><\/h4>\n

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            \n

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