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class=\"wp-block-heading\">Internet\u63d0\u4f9b\u7684\u4f20\u8f93\u670d\u52a1<\/h2>\n\n\n\n<p>Internet\u63d0\u4f9b\u4e24\u7c7b\u4f20\u8f93\u670d\u52a1\u3002\u4e00\u4e2a\u662fTCP\uff0c\u4e00\u4e2a\u662fUDP\u3002TCP\u662f\u9762\u5411\u8fde\u63a5\u7684\u670d\u52a1\uff0c\u8fd9\u4e2a\u8fde\u63a5\u662f\u5168\u53cc\u5de5\u7684\uff0c\u5b83\u662f\u53ef\u9760\u7684\uff0c\u80fd\u628a\u5e95\u5c42\u7684\u4e0d\u53ef\u9760\u8f6c\u4e3a\u53ef\u9760\u7684\u3002UDP\u662f\u65e0\u8fde\u63a5\u7684\uff0c\u5b83\u505a\u4e86\u4efb\u4f55\u4e00\u4e2a\u4f20\u8f93\u5c42\u670d\u52a1\u5fc5\u987b\u8981\u505a\u7684\u57fa\u672c\u4e8b\u4ef6\uff0c\u867d\u7136\u7b80\u5355\uff0c\u4f46\u662f\u7ed9\u6211\u4eec\u63d0\u4f9b\u4e86\u6700\u57fa\u672c\u7684\u670d\u52a1\u548c\u638c\u63a7\u81ea\u7531\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/34TCP\u548cUDP-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"651\" height=\"335\" data-original=\"http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/34TCP\u548cUDP-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-510\"  sizes=\"auto, (max-width: 651px) 100vw, 651px\" \/><\/div><\/figure>\n\n\n\n<p>\u601d\u8003\uff1a\u76d8\u70b9\u4f60\u8ba1\u7b97\u673a\u4e0a\u7684\u7f51\u7edc\u5e94\u7528\uff0c\u6240\u91c7\u7528\u7684\u540d\u5b57\u3001\u529f\u80fd\u3001\u534f\u8bae\u7b49\uff0c\u5206\u6790\u4f7f\u7528\u7684\u4f20\u8f93\u670d\u52a1\u662fTCP\u8fd8\u662fUDP\uff1f<\/p>\n\n\n\n<p>\u6211\u7684\u56de\u7b54\uff1aQQ\u65e2\u6709UDP\u4e5f\u6709TCP\uff01QQ\u91c7\u7528\u7684\u901a\u4fe1\u534f\u8bae\u4ee5UDP\u4e3a\u4e3b\uff0c\u8f85\u4ee5TCP\u534f\u8bae\u3002QQ\u5ba2\u6237\u7aef\u4e4b\u95f4\u7684\u6d88\u606f\u4f20\u9001\u4e3b\u8981\u91c7\u7528\u4e86UDP\u6a21\u5f0f\uff0c\u56e0\u4e3a\u7528\u6237\u5b9e\u5728\u592a\u591a\u4e86\uff0c\u4f7f\u7528UDP\u7684\u597d\u5904\u5c31\u662f\u4f20\u8f93\u9ad8\u6548\u3001\u5360\u7528\u8d44\u6e90\u5c11\u3002\u4e3a\u4e86\u89e3\u51b3UDP\u7684\u4e0d\u53ef\u9760\u95ee\u9898\uff0c\u817e\u8baf\u91c7\u7528\u4e0a\u5c42\u534f\u8bae\u6765\u4fdd\u8bc1\u53ef\u9760\u4f20\u8f93\uff0c\u5982\u679c\u5ba2\u6237\u7aef\u4f7f\u7528UDP\u534f\u8bae\u53d1\u51fa\u6d88\u606f\u540e\uff0c\u670d\u52a1\u5668\u6536\u5230\u8be5\u5305\uff0c\u9700\u8981\u4f7f\u7528UDP\u534f\u8bae\u53d1\u56de\u4e00\u4e2a\u5e94\u7b54\u5305\u3002\u5982\u6b64\u6765\u4fdd\u8bc1\u6d88\u606f\u53ef\u4ee5\u65e0\u9057\u6f0f\u4f20\u8f93\u3002\u4e4b\u6240\u4ee5\u4f1a\u53d1\u751f\u5728\u5ba2\u6237\u7aef\u660e\u660e\u770b\u5230\u201c\u6d88\u606f\u53d1\u9001\u5931\u8d25\u201d\u4f46\u5bf9\u65b9\u53c8\u6536\u5230\u4e86\u8fd9\u4e2a\u6d88\u606f\u7684\u60c5\u51b5\uff0c\u5c31\u662f\u56e0\u4e3a\u5ba2\u6237\u7aef\u53d1\u51fa\u7684\u6d88\u606f\u670d\u52a1\u5668\u5df2\u7ecf\u6536\u5230\u5e76\u8f6c\u53d1\u6210\u529f\uff0c\u4f46\u5ba2\u6237\u7aef\u7531\u4e8e\u7f51\u7edc\u539f\u56e0\u6ca1\u6709\u6536\u5230\u670d\u52a1\u5668\u7684\u5e94\u7b54\u5305\u5f15\u8d77\u7684\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Web\u4e0eHTTP<\/h2>\n\n\n\n<p>Web\u6709\u5f88\u591a\u7f51\u9875\uff0c\u8fd9\u4e9b\u7f51\u9875\u4e92\u76f8\u8fde\u63a5\u3002\u7f51\u9875\u53c8\u5305\u542b\u591a\u4e2a\u5bf9\u8c61\uff0c\u5305\u62ecHTML\u6587\u4ef6\u3001JPEG\u56fe\u7247\u3001\u89c6\u9891\u6587\u4ef6\u3001\u52a8\u6001\u811a\u672c\u7b49\u5f85\u3002\u8fd9\u4e9b<strong>web\u5bf9\u8c61\u7684\u5bfb\u5740\u901a\u8fc7URL\u6807\u8bc6<\/strong>\uff08RFC1738\uff09\u3002\u9ed8\u8ba4\u7701\u7565http\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/35URL-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"546\" height=\"73\" data-original=\"http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/35URL-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-512\"  sizes=\"auto, (max-width: 546px) 100vw, 546px\" \/><\/div><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">HTTP\u534f\u8bae\uff08\u8d85\u6587\u672c\u4f20\u8f93\u534f\u8bae\uff09<\/h3>\n\n\n\n<p>\u4e07\u7ef4\u7f51\u9700\u8981HTTP\u9075\u5faa\u8d85\u6587\u672c\u4f20\u8f93\u534f\u8bae\u3002<strong>HTTP\u534f\u8bae\u91c7\u7528\u7684\u662fC\/S\u7ed3\u6784<\/strong>\uff0c\u5ba2\u6237\uff08\u6d4f\u89c8\u5668\uff09\u8d1f\u8d23\u8bf7\u6c42\u3001\u63a5\u6536\u548c\u89e3\u6790\u5c55\u793aweb\u5bf9\u8c61\u3002\u670d\u52a1\u5668\u8d1f\u8d23\u54cd\u5e94\u5ba2\u6237\u7684\u8bf7\u6c42\uff0c\u751f\u6210\u54cd\u5e94\u6d88\u606f\uff0c\u53d1\u9001\u54cd\u5e94\u5bf9\u8c61\u3002<\/p>\n\n\n\n<p><strong>HTTP\u4f7f\u7528\u7684\u4f20\u8f93\u5c42\u534f\u8bae\u662fTCP\u4f20\u8f93\u534f\u8bae<\/strong>\uff1a\u670d\u52a1\u5668\u572880\u7aef\u53e3\u7b49\u5f85\u5ba2\u6237\u7684\u8bf7\u6c42\uff0c\u6d4f\u89c8\u5668\u53d1\u8d77\u5230\u670d\u52a1\u5668\u7684TCP\u94fe\u63a5\uff08\u521b\u5efa\u5957\u63a5\u5b57Socket\uff09\uff0c\u670d\u52a1\u5668\u63a5\u6536\u6765\u81ea\u6d4f\u89c8\u5668\u7684TCP\u8fde\u63a5\uff0c\u6d4f\u89c8\u5668\uff08HTTP\uff09\u4e0eWeb\u670d\u52a1\u5668\uff08HTTP\u670d\u52a1\u5668\uff09\u4ea4\u6362HTTP\u6d88\u606f\uff0c\u5b8c\u6bd5\u540e\u5173\u95edTCP\u8fde\u63a5\u3002<\/p>\n\n\n\n<p><strong>HTTP\u662f\u4e2a\u65e0\u72b6\u6001\u534f\u8bae<\/strong>\uff0c\u670d\u52a1\u5668\u4e0d\u7ef4\u62a4\u4efb\u4f55\u6709\u5173\u5ba2\u6237\u7aef\u8fc7\u53bb\u6240\u53d1\u7684\u8bf7\u6c42\u6d88\u606f\u3002\u6709\u72b6\u6001\u7684\u534f\u8bae\u5f80\u5f80\u66f4\u52a0\u590d\u6742\uff0c\u9700\u8981\u7ef4\u62a4\u72b6\u6001\uff08\u5386\u53f2\u4fe1\u606f\uff09\u3002\u4e00\u65e6\u5ba2\u6237\u6216\u670d\u52a1\u5668\u5931\u6548\uff0c\u4f1a\u4ea7\u751f\u72b6\u6001\u7684\u4e0d\u4e00\u81f4\uff0c\u89e3\u51b3\u8fd9\u79cd\u4e0d\u4e00\u81f4\u4ee3\u4ef7\u9ad8\u3002\u5047\u8bbe\u7528\u65e0\u72b6\u6001\u534f\u8bae\uff0c\u670d\u52a1\u5668\u90e8\u4e0d\u7ef4\u62a4\u4efb\u4f55\u6709\u5173\u5ba2\u6237\u7aef\u8fc7\u53bb\u6240\u53d1\u8bf7\u6c42\u7684\u4fe1\u606f\uff0c\u5c31\u65b9\u4fbf\u4e00\u70b9\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">HTTP\u8fde\u63a5<\/h3>\n\n\n\n<p>HTTP\u8fde\u63a5\u7c7b\u578b\u5206\u4e3a<strong>\u6301\u4e45\u6027\u8fde\u63a5<\/strong>\u548c<strong>\u975e\u6301\u4e45\u6027\u8fde\u63a5<\/strong>\u3002\u975e\u6301\u4e45\u6027\u8fde\u63a5\u6bcf\u4e2aTCP\u8fde\u63a5\u6700\u591a\u5141\u8bb8\u4f20\u8f93\u4e00\u4e2a\u5bf9\u8c61\u3002\u6301\u4e45\u6027\u8fde\u63a5\u4e2d\u6bcf\u4e2aTCP\u8fde\u63a5\u5141\u8bb8\u4f20\u8f93\u591a\u4e2a\u5bf9\u8c61\u3002HTTP1.1\u7248\u672c\u53ca\u540e\u9ed8\u8ba4\u4f7f\u7528\u6301\u4e45\u6027\u8fde\u63a5\u3002\u4ee5\u4e0b\u662f\u975e\u6301\u4e45\u6027\u8fde\u63a5\u7684\u4f8b\u5b50\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/36\u975e\u6301\u4e45\u6027\u8fde\u63a5-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"727\" height=\"394\" data-original=\"http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/36\u975e\u6301\u4e45\u6027\u8fde\u63a5-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-513\"  sizes=\"auto, (max-width: 727px) 100vw, 727px\" \/><\/div><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/36\u975e\u6301\u4e45\u6027\u8fde\u63a52-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"683\" height=\"223\" data-original=\"http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/36\u975e\u6301\u4e45\u6027\u8fde\u63a52-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-514\"  sizes=\"auto, (max-width: 683px) 100vw, 683px\" \/><\/div><\/figure>\n\n\n\n<p>\u6211\u4eec\u628a\u4ece\u5ba2\u6237\u7aef\u53d1\u9001\u4e00\u4e2a\u5f88\u5c0f\u7684\u6570\u636e\u5305\u5230\u670d\u52a1\u5668\u5e76\u8fd4\u56de\u6240\u7ecf\u5386\u7684\u65f6\u95f4\u79f0\u4e3a<strong>RTT\uff08Round Trip Time\uff09<\/strong>\u3002\u975e\u6301\u4e45\u6027\u8fde\u63a5\u91cc\uff0c\u603b\u7684\u54cd\u5e94\u65f6\u95f4Total=2RTT+\u6587\u4ef6\u53d1\u9001\u65f6\u95f4\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53d1\u8d77\u3001\u5efa\u7acbTCP\u8fde\u63a5\uff1a1\u4e2aRTT<\/li>\n\n\n\n<li>\u53d1\u9001HTTP\u8bf7\u6c42\u6d88\u606f\u5230HTTP\u54cd\u5e94\u6d88\u606f\u7684\u524d\u51e0\u4e2a\u5b57\u8282\u5230\u8fbe\uff1a1\u4e2aRTT<\/li>\n\n\n\n<li>\u53d1\u9001\u6587\u4ef6\u6240\u9700\u65f6\u95f4<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/37RTT-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"296\" height=\"350\" data-original=\"http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/37RTT-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-515\"  sizes=\"auto, (max-width: 296px) 100vw, 296px\" \/><\/div><\/figure>\n\n\n\n<p>\u7531\u4e8eHTTP\u534f\u8bae\u65e0\u72b6\u6001\uff0c\u5c31\u50cf\u4e0a\u9762\u7684\u4f8b\u5b50\uff0c\u6bcf\u5f20\u56fe\u7247\u7684\u8bf7\u6c42\u90fd\u8981\u5efa\u7acb\u4e00\u4e2aHTTP\u8bf7\u6c42\uff0c\u5f88\u9ebb\u70e6\uff0c\u6240\u4ee5\u624d\u6709\u4e86\u6301\u4e45\u6027\u8fde\u63a5\u3002\u6301\u4e45\u6027\u8fde\u63a5\u7ec6\u5206\u7684\u8bdd\uff0c\u53c8\u5206\u4e3a\u65e0\u6d41\u6c34\u7684\u6301\u4e45\u6027\u8fde\u63a5\u3001\u5e26\u6709\u6d41\u6c34\u673a\u5236\u7684\u6301\u4e45\u6027\u8fde\u63a5\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/38\u6301\u4e45\u6027HTTP\u8fde\u63a5-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"799\" height=\"395\" data-original=\"http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/38\u6301\u4e45\u6027HTTP\u8fde\u63a5-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-516\"  sizes=\"auto, (max-width: 799px) 100vw, 799px\" \/><\/div><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">HTTP\u8bf7\u6c42\u6d88\u606f\u548c\u54cd\u5e94\u6d88\u606f<\/h3>\n\n\n\n<p>HTTP\u534f\u8bae\u6709\u4e24\u7c7b\u6d88\u606f\uff0c\u5206\u522b\u662f\u8bf7\u6c42\u6d88\u606f\u548c\u54cd\u5e94\u6d88\u606f\u3002<\/p>\n\n\n\n<p><strong>\u8bf7\u6c42\u6d88\u606f<\/strong>\u91cc\uff0c\u7b2c\u4e00\u884c\u662f\u8bf7\u6c42\u884c\uff0c\u4e0b\u9762\u51e0\u884c\u662f\u5934\u90e8\u884c\uff0c\u518d\u9047\u5230\u4e00\u884c\u7a7a\u884c\uff0c\u8868\u793a\u8bf7\u6c42\u6d88\u606f\u7ed3\u675f\u4e86\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/39\u8bf7\u6c42\u62a5\u6587-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"560\" height=\"252\" data-original=\"http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/39\u8bf7\u6c42\u62a5\u6587-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-517\"  sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><\/div><\/figure>\n\n\n\n<p>\u5e38\u89c1\u7684\u8bf7\u6c42\u65b9\u6cd5\u6709POST\u65b9\u6cd5\u548cGET\u65b9\u6cd5\u3002POST\u65b9\u6cd5\u662f\u5728\u8bf7\u6c42\u6d88\u606f\u7684\u6d88\u606f\u4f53\uff08entity body\uff09\u4e2d\u4e0a\u4f20\u5ba2\u6237\u7aef\u7684\u8f93\u5165\uff0cGET\u65b9\u6cd5\u8f93\u5165\u4fe1\u606f\u901a\u8fc7request\u884c\u7684URL\u5b57\u6bb5\u4e0a\u4f20\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/40\u8bf7\u6c42\u65b9\u6cd5-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"774\" height=\"268\" data-original=\"http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/40\u8bf7\u6c42\u65b9\u6cd5-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-518\"  sizes=\"auto, (max-width: 774px) 100vw, 774px\" 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src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/41\u54cd\u5e94\u62a5\u6587-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-519\"\/><\/div><\/figure>\n\n\n\n<p>\u4f53\u9a8cHTTP\u53ef\u4ee5\u53ef\u4ee5\u5229\u7528telnet\u767b\u5f55\u5230\u67d0\u4e2aWeb\u670d\u52a1\u5668\u3002<\/p>\n\n\n\n<h2 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class=\"wp-block-heading\">Email\u5e94\u7528<\/h2>\n\n\n\n<p>\u8be5\u5e94\u7528<strong>\u4f9d\u8d56TCP\u8fdb\u884cEmail\u6d88\u606f\u7684\u53ef\u9760\u4f20\u8f93\uff0c\u662f\u5360\u7528\u670d\u52a1\u5668\u768425\u53f7\u7aef\u53e3\u3002<\/strong>Email\u6d88\u606f\u53ea\u5305\u542b7\u4f4dASCII\u7801\u3002<strong>\u4f7f\u7528SMTP\u534f\u8bae\uff0c\u662f\u6301\u4e45\u6027\u8fde\u63a5\u3002<\/strong>\u4e0eHTTP\u6bd4\uff0cHTTP\u662f\u62c9\u5f0f\uff08pull\uff09\uff0c\u628a\u7f51\u9875\u62c9\u56de\u672c\u5730\u3001\u6bcf\u4e2a\u5bf9\u8c61\u5c01\u88c5\u5728\u72ec\u7acb\u7684\u54cd\u5e94\u6d88\u606f\u4e2d\uff0c\u800cSMTP\u662f\u9000\u5f0f\uff08push\uff09\u628a\u6d88\u606f\u63a8\u7ed9\u7528\u6237\u3001\u591a\u4e2a\u5bf9\u8c61\u5728\u7531\u591a\u4e2a\u90e8\u5206\u6784\u6210\u7684\u6d88\u606f\u4e2d\u53d1\u9001\u3002\u4e24\u534f\u8bae\u90fd\u4f7f\u7528\u547d\u4ee4\/\u54cd\u5e94\u4ea4\u4e92\u6a21\u5f0f\uff0c\u547d\u4ee4\u548c\u72b6\u6001\u4ee3\u7801\u90fd\u662fASCII\u7801\u3002<\/p>\n\n\n\n<p>Email\u5e94\u7528\u7684\u6784\u6210\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u90ae\u4ef6\u5ba2\u6237\u7aef\uff1a\u80fd\u8bfb\u3001\u5199Email\u6d88\u606f\uff0c\u4e0e\u670d\u52a1\u5668\u4ea4\u4e92\uff0c\u6536\u3001\u53d1Email\u6d88\u606f\uff0c\u4f4d\u4e8eWeb\u5ba2\u6237\u7aef\u3002<\/li>\n\n\n\n<li>\u90ae\u4ef6\u670d\u52a1\u5668\uff1a\u6709\u4e2a\u90ae\u7bb1\uff0c\u5b58\u50a8\u53d1\u7ed9\u8be5\u7528\u6237\u7684Email\uff1b\u6709\u4e2a\u6d88\u606f\u961f\u5217\uff0c\u5b58\u50a8\u7b49\u5f85\u53d1\u9001\u7684Email\u3002\u8fd9\u6837\u80fd\u4fdd\u8bc1\u7528\u6237\u4efb\u4f55\u65f6\u5019\u90fd\u80fd\u53d1\u90ae\u4ef6\u6216\u8005\u6536\u90ae\u4ef6<\/li>\n\n\n\n<li>SMTP\u534f\u8bae\uff1a\u662f\u90ae\u4ef6\u670d\u52a1\u5668\u4e4b\u95f4\u4f20\u9012\u6d88\u606f\u6240\u4f7f\u7528\u7684\u534f\u8bae\u3002\u53ef\u914d\u5408MIME\uff0c\u591a\u5a92\u4f53\u90ae\u4ef6\u62d3\u5c55\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u53d1\u7684\u65f6\u5019\u4f7f\u7528STMP\u534f\u8bae\uff0c\u90ae\u4ef6\u670d\u52a1\u5668\u4e4b\u95f4\u53d1\u9001\u90ae\u4ef6\u4e5f\u662f\u4f7f\u7528STMP\u534f\u8bae\uff0c\u4f46\u662f\u6536\u4ef6\u4eba\u8fd8\u9700\u8981<strong>\u90ae\u4ef6\u8bbf\u95ee\u534f\u8bae<\/strong>\u624d\u80fd\u4ece\u670d\u52a1\u5668\u83b7\u53d6\u90ae\u4ef6\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>POP\u534f\u8bae\uff1a\u5982\u679c\u662f\u201c\u4e0b\u8f7d\u5e76\u5220\u9664\u201d\u6a21\u5f0f\uff0c\u7528\u6237\u5982\u679c\u6362\u4e86\u5ba2\u6237\u7aef\u8f6f\u4ef6\uff0c\u65e0\u6cd5\u91cd\u8bfb\u8be5\u90ae\u4ef6\uff1b\u5982\u679c\u662f\u201c\u4e0b\u8f7d\u5e76\u4fdd\u6301\u201d\u6a21\u5f0f\uff0c\u4e0d\u540c\u5ba2\u6237\u7aef\u90fd\u53ef\u4ee5\u4fdd\u7559\u6d88\u606f\u7684\u62f7\u8d1d\u3002POP3\u662f\u65e0\u72b6\u6001\u7684\u3002<\/li>\n\n\n\n<li>IMAP\u534f\u8bae\uff1a\u62e5\u6709\u66f4\u591a\u529f\u80fd\uff0c\u80fd\u591f\u64cd\u7eb5\u670d\u52a1\u5668\u4e0a\u5b58\u50a8\u7684\u6d88\u606f\u3002\u6d88\u606f\u7edf\u4e00\u4fdd\u5b58\u5728\u4e00\u4e2a\u5730\u65b9\u2014\u2014\u670d\u52a1\u5668\uff0c\u5141\u8bb8\u7528\u6237\u5229\u7528\u6587\u4ef6\u5939\u7ec4\u7ec7\u6d88\u606f\uff0cIMAP\u652f\u6301\u8de8\u4f1a\u8bdd\uff08Session\uff09\u7684\u7528\u6237\u72b6\u6001\uff0c\u670d\u52a1\u5668\u4f1a\u5c06\u6587\u4ef6\u5939\u4e0e\u6d88\u606fID\u4e4b\u95f4\u505a\u6620\u5c04\uff0c\u6240\u4ee5\u662f\u4e2a\u6709\u72b6\u6001\u534f\u8bae\u3002<\/li>\n\n\n\n<li>HTTP\uff1a163\uff0cQQ\uff0cMail\u7b49<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/43\u90ae\u4ef6\u83b7\u53d6\u534f\u8bae-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/43\u90ae\u4ef6\u83b7\u53d6\u534f\u8bae-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-521\"\/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">DNS\u5e94\u7528<\/h2>\n\n\n\n<p>DNS\u662f\u89e3\u51b3Internet\u4e0a\u4e3b\u673a\/\u8def\u7531\u5668\u7684\u8bc6\u522b\u95ee\u9898\u3002\u65e5\u5e38\u751f\u6d3b\u4e2d\uff0c\u6211\u4eec\u5e38\u5e38\u4f7f\u7528\u57df\u540d\u53bb\u8bbf\u95ee\u7f51\u9875\uff0c\u800c\u4e0d\u662fIP\u5730\u5740\u3002<\/p>\n\n\n\n<p><strong>\u57df\u540d\u89e3\u6790\u7cfb\u7edf\uff08DNS\uff09\u4e5f\u662f\u5e94\u7528\u5c42\u534f\u8bae<\/strong>\uff0c\u662f\u591a\u5c42\u547d\u540d\u670d\u52a1\u5668\u6784\u6210\u7684\u5206\u5e03\u5f0f\u6570\u636e\u5e93\uff0c\u5e94\u7528\u5c42\u534f\u8bae\u8d1f\u8d23\u5b8c\u6210\u540d\u5b57\u7684\u89e3\u6790\uff0c\u5c5e\u4e8eInternet\u7684\u6838\u5fc3\u529f\u80fd\u3002<strong>DNS\u63d0\u4f9b\u57df\u540d\u5411IP\u5730\u5740\u7684\u7ffb\u8bd1\u3002<\/strong><\/p>\n\n\n\n<p>DNS\u53ef\u4ee5\u63d0\u4f9b\u7684\u529f\u80fd\uff1a\u80fd\u591f\u5c06\u57df\u540d\u7ffb\u8bd1\u6210IP\u5730\u5740\uff1b\u4e3a\u4e3b\u673a\u8d77\u522b\u540d\uff1b\u90ae\u4ef6\u670d\u52a1\u5668\u522b\u540d\uff1b\u8d1f\u8f7d\u5747\u8861\uff08\u5f53\u8fdb\u884cIP\u5730\u5740\u7ffb\u8bd1\u65f6\uff0c\u53ef\u4ee5\u63d0\u4f9b\u591a\u4e2a\u6620\u5c04\uff0c\u7ed9\u51fa\u591a\u4e2aWeb\u670d\u52a1\u5668\u7684IP\u5730\u5740\uff0c\u8fd9\u4e9b\u5730\u5740\u8f6e\u6d41\u51fa\u73b0\u7b2c\u4e00\u540d\uff0c\u8f6e\u6d41\u88ab\u8bbf\u95ee\uff09\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/44\u5206\u5e03\u5f0f\u5c42\u6b21\u5f0f\u6570\u636e\u5e93-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/44\u5206\u5e03\u5f0f\u5c42\u6b21\u5f0f\u6570\u636e\u5e93-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-522\"\/><\/div><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DNS\u6839\u57df\u540d\u670d\u52a1\u5668\uff1a\u5f53\u672c\u5730\u57df\u540d\u89e3\u6790\u670d\u52a1\u5668\u65e0\u6cd5\u89e3\u6790\u57df\u540d\u65f6\uff0c\u4f1a\u8bbf\u95ee\u6839\u57df\u540d\u670d\u52a1\u5668\uff0c\u6839\u57df\u540d\u8981\u662f\u8fd8\u4e0d\u77e5\u9053\u5c31\u8bbf\u95ee\u6743\u5a01\u57df\u540d\u670d\u52a1\u5668\uff0c\u83b7\u5f97\u6620\u5c04\uff0c\u5411\u672c\u5730\u57df\u540d\u670d\u52a1\u5668\u8fd4\u56de\u6620\u5c04\u3002\u5168\u7403\u670913\u4e2a\u6839\u57df\u540d\u670d\u52a1\u5668\u3002<\/li>\n\n\n\n<li>TLD\u9876\u7ea7\u57df\u540d\u670d\u52a1\u5668\uff1a\u8d1f\u8d23com\uff0corg\uff0cnet\uff0ceud\u7b49\u9876\u7ea7\u57df\u540d\u548c\u56fd\u5bb6\u9876\u7ea7\u57df\u540d\uff0c\u5982cn\uff0cuk\uff0cfr\u7b49~<\/li>\n\n\n\n<li>\u6743\u5a01\u57df\u540d\u670d\u52a1\u5668\uff1a\u7ec4\u7ec7\u7684\u57df\u540d\u89e3\u6790\u670d\u52a1\u5668\uff0c\u63d0\u4f9b\u7ec4\u7ec7\u5185\u90e8\u670d\u52a1\u5668\u7684\u89e3\u6790\u670d\u52a1\u3002<\/li>\n\n\n\n<li>\u672c\u5730\u57df\u540d\u89e3\u6790\u670d\u52a1\u5668\uff1a\u4e0d\u4e25\u683c\u5c5e\u4e8e\u5c42\u7ea7\u4f53\u7cfb\uff0c\u6bcf\u4e2aISP\u6709\u4e00\u4e2a\u672c\u5730\u57df\u540d\u670d\u52a1\u5668\u3002\u5f53\u7528\u6237\u8fdb\u884cDNS\u67e5\u8be2\u65f6\uff0c\u67e5\u8be2\u88ab\u53d1\u9001\u5230\u672c\u5730\u57df\u540d\u670d\u52a1\u5668\uff0c\u5b83\u5c06\u4f5c\u4e3a\u4ee3\u7406\uff0c\u5c06\u67e5\u8be2\u8f6c\u53d1\u7ed9\uff08\u5c42\u7ea7\u5f0f\uff09\u57df\u540d\u89e3\u6790\u670d\u52a1\u5668\u7cfb\u7edf\u3002<\/li>\n<\/ul>\n\n\n\n<p>DNS\u67e5\u8be2\u53c8\u5206\u4e3a\u8fed\u4ee3\u67e5\u8be2\u548c\u9012\u5f52\u67e5\u8be2\u3002<\/p>\n\n\n\n<p>\u4e3a\u4e86\u9ad8\u6548\u67e5\u8be2\uff0c\u672c\u5730\u57df\u540d\u670d\u52a1\u5668\u5e38\u7f13\u5b58\u9876\u7ea7\u57df\u540d\u670d\u52a1\u5668\u7684\u6620\u5c04\uff0c\u53ea\u8981\u57df\u540d\u89e3\u6790\u670d\u52a1\u5668\u83b7\u5f97\u57df\u540d\u2014\u2014IP\u6620\u5c04\uff0c\u5c31\u7f13\u5b58\u8fd9\u4e00\u6620\u5c04\u3002\u4e00\u6bb5\u65f6\u95f4\u8fc7\u540e\uff0c\u7f13\u5b58\u6761\u76ee\u4f1a\u5931\u6548\u5220\u9664\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">DNS\u8d44\u6e90\u8bb0\u5f55<\/h3>\n\n\n\n<p>DNS\u6570\u636e\u5e93\u91cc\u7684\u8d44\u6e90\u8bb0\u5f55\u5982\u4e0b\u56fe\uff0c\u8d44\u6e90\u8bb0\u5f55\u5c31\u662f\u4e2a\u56db\u5143\u7ec4\u3002\u4e0d\u540c\u7c7b\u578b\u7684Name\u548cValue\u662f\u4e0d\u540c\u7684\u3002Type=A\u662f\u6700\u57fa\u672c\u7684\u4e3b\u673a\u5230IP\u5730\u5740\u7684\u6620\u5c04\uff1bType=NS\u6307\u660e\u8fd9\u4e2a\u57df\u7684\u57df\u540d\u89e3\u6790\u670d\u52a1\u5668\u662f\u4ec0\u4e48\uff1bType=CNAME\u662f\u522b\u540d\u5230\u771f\u5b9e\u57df\u540d\u7684\u6620\u5c04\uff1bType=MX\u662f\u5e94\u7528\u4e8e\u90ae\u4ef6\u670d\u52a1\u7684\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/45DNS\u8bb0\u5f55-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"816\" height=\"365\" data-original=\"http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/45DNS\u8bb0\u5f55-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-523\"  sizes=\"auto, (max-width: 816px) 100vw, 816px\" \/><\/div><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u5982\u4f55\u6ce8\u518c\u57df\u540d\uff1f<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full is-style-default\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/46\u6ce8\u518c\u57df\u540d-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"826\" height=\"313\" data-original=\"http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/46\u6ce8\u518c\u57df\u540d-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-524\"  sizes=\"auto, (max-width: 826px) 100vw, 826px\" \/><\/div><\/figure>\n\n\n\n<p><a href=\"https:\/\/www.33yd.com\/idcnews\/891.html\">\u601d\u8003\uff1a\u6211\u56fd\u6ca1\u6709\u6839\u57df\u540d\u670d\u52a1\u5668\uff0c\u662f\u5426\u4f1a\u5f71\u54cd\u6211\u56fd\u7684\u7f51\u7edc\u5b89\u5168\uff1f<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">P2P\u5e94\u7528<\/h2>\n\n\n\n<p>P2P\u67b6\u6784\u7684\u7279\u70b9\uff1a\u6ca1\u6709\u670d\u52a1\u5668\uff0c\u4efb\u610f\u7aef\u7cfb\u7edf\u4e4b\u95f4\u53ef\u4ee5\u76f4\u63a5\u901a\u4fe1\uff0c\u8282\u70b9\u9636\u6bb5\u6027\u63a5\u5165Internet\uff0c\u8282\u70b9\u53ef\u80fd\u66f4\u6362IP\u5730\u5740\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/48P2P-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"381\" height=\"334\" data-original=\"http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/48P2P-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-525\"  sizes=\"auto, (max-width: 381px) 100vw, 381px\" \/><\/div><\/figure>\n\n\n\n<p><em>\u601d\u8003\uff1a\u4ece\u6587\u4ef6\u5206\u53d1\u89d2\u5ea6\u770b\uff0cC\/S\u5e94\u7528\u548cP2P\u5e94\u7528\u4e2d\uff0c\u4ece\u4e00\u4e2a\u670d\u52a1\u5668\u5411N\u4e2a\u8282\u70b9\u5206\u53d1\u4e00\u4e2a\u6587\u4ef6\uff0c\u6027\u80fd\u54ea\u4e2a\u66f4\u597d\uff1f<\/em><\/p>\n\n\n\n<p>\u7b54\uff1a\u5982\u679c\u91c7\u7528C\/S\u67b6\u6784\uff0c\u82b1\u8d39\u7684\u65f6\u95f4\u662f\u7ebf\u6027\u589e\u957f\u7684\u3002\u800cP2P\u67b6\u6784\u662f\u603b\u4f1a\u8d8b\u4e8e\u4e00\u4e2a\u5e73\u7a33\u7684\u503c\uff0c\u660e\u663e\u4f4e\u4e8eC\/S\uff0c\u5f53\u8282\u70b9\u6570\u76ee\u589e\u5927\uff0c\u65f6\u95f4\u4e0d\u4f1a\u592a\u591a\u589e\u957f\u3002\u6240\u4ee5\u73b0\u5728\u7684\u4e0b\u8f7d\u5e94\u7528\u5e7f\u6cdb\u7684\u4f7f\u7528P2P\u5e94\u7528\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/49P2P\u6587\u4ef6\u5206\u53d1-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"495\" height=\"335\" data-original=\"http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/49P2P\u6587\u4ef6\u5206\u53d1-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-526\"  sizes=\"auto, (max-width: 495px) 100vw, 495px\" \/><\/div><\/figure>\n\n\n\n<p>BitTorrent\u662f\u4f7f\u7528P2P\u8fdb\u884c\u6587\u4ef6\u5206\u53d1\u7684\u5178\u578b\u5e94\u7528\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u6bd4\u7279\u6d41(<em>BitTorrent<\/em>)\u662f\u4e00\u79cd\u5185\u5bb9\u5206\u53d1\u534f\u8bae\uff0c\u7531\u5e03\u62c9\u59c6\u00b7\u79d1\u6069\u81ea\u4e3b\u5f00\u53d1\u3002\u5b83\u91c7\u7528\u9ad8\u6548\u7684\u8f6f\u4ef6\u5206\u53d1\u7cfb\u7edf\u548c\u70b9\u5bf9\u70b9\u6280\u672f\u5171\u4eab\u5927\u4f53\u79ef\u6587\u4ef6(\u5982\u4e00\u90e8\u7535\u5f71\u6216\u7535\u89c6\u8282\u76ee)\uff0c\u5e76\u4f7f\u6bcf\u4e2a\u7528\u6237\u50cf\u7f51\u7edc\u91cd\u65b0\u5206\u914d\u7ed3\u70b9\u90a3\u6837\u63d0\u4f9b\u4e0a\u4f20\u670d\u52a1\u3002<\/p>\n<\/blockquote>\n\n\n\n<p>\u5982\u56fe\u6240\u793a\uff0ctracker\u76f8\u5f53\u4e8e\u7ba1\u7406\u8005\u3002\u6587\u4ef6\u88ab\u5212\u5206\u4e3a256KB\u7684chunk\uff0c\u8282\u70b9\u52a0\u5165torrent\u65f6\uff0c\u672c\u6765\u6ca1\u6709chunk\u7684\uff0c\u4f46\u662f\u4f1a\u6162\u6162\u7d2f\u79ef\uff0c\u5b83\u4f1a\u5411tracker\u6ce8\u518c\u4ee5\u83b7\u5f97\u8282\u70b9\u6e05\u5355\uff0c\u4e0e\u6e05\u5355\u7684\u67d0\u4e9b\u8282\u70b9\uff08\u201c\u90bb\u5c45\u201d\uff09\u5efa\u7acb\u8fde\u63a5\u3002\u8282\u70b9\u81ea\u5df1\u4e0b\u8f7d\u7684\u540c\u65f6\uff0c\u9700\u8981\u5411\u5176\u4ed6\u8282\u70b9\u4e0a\u4f20chunk\uff0c\u5927\u5bb6\u4e92\u76f8\u5171\u4eab\u3002\u5f53\u8282\u70b9\u83b7\u5f97\u4e86\u9700\u8981\u7684\u6587\u4ef6\u540e\uff0c\u53ef\u80fd\u5c31\u79bb\u5f00\u4e86\u3002\u4efb\u4f55\u65f6\u5019\uff0c\u8282\u70b9\u90fd\u662f\u52a8\u6001\u5730\u52a0\u5165\u6216\u79bb\u5f00\u7684\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/50BitTorrent-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"702\" height=\"378\" data-original=\"http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/50BitTorrent-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-527\"  sizes=\"auto, (max-width: 702px) 100vw, 702px\" \/><\/div><\/figure>\n\n\n\n<p>\u5728\u83b7\u53d6chunk\u7684\u65f6\u5019\uff0c\u7ed9\u5b9a\u4efb\u610f\u65f6\u523b\uff0c\u4e0d\u540c\u7684\u8282\u70b9\u6301\u6709\u6587\u4ef6\u7684\u4e0d\u540cchunk\u96c6\u5408\uff0c\u8282\u70b9\u4f1a\u5b9a\u671f\u67e5\u8be2\u6bcf\u4e2a\u90bb\u5c45\u6240\u6301\u6709\u7684chunk\u5217\u8868\u3002\u5f53\u8282\u70b9\u8981\u4e3b\u52a8\u53d1\u9001\u7279\u5b9a\u67e5\u8be2\u8bf7\u6c42\u83b7\u53d6\u7f3a\u5931\u7684chunk\u65f6\uff0c\u4f1a\u628achunk\u7684\u62e5\u6709\u8005\u5c11\u7684\u90a3\u4efd\u5148\u8bf7\u6c42\u56de\u6765\u3002\u514d\u5f97\u8fd9\u4e9b\u8282\u70b9\u79bb\u5f00\u4e86\u5c31\u8bf7\u6c42\u4e0d\u5230\u4e86\u3002<\/p>\n\n\n\n<p>\u5728\u53d1\u9001chunk\u65f6\uff0c\u8282\u70b9\u4f1a\u9009\u53d6\u548c\u5b83\u5efa\u7acb\u8fde\u63a5\u6700\u5feb\u76844\u4e2a\u8282\u70b9\u53d1\u9001chunk\uff0c\u6bcf10\u79d2\u91cd\u65b0\u8bc4\u4f30top4\u3002\u603b\u7ed3\u8bf4\uff0c\u4f60\u7684\u4e0a\u4f20\u901f\u7387\u8d8a\u9ad8\uff0c\u8d8a\u80fd\u627e\u5230\u66f4\u597d\u7684\u4ea4\u6613\u4f19\u4f34\uff0c\u66f4\u5feb\u5730\u83b7\u53d6\u6587\u4ef6\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">P2P\u7d22\u5f15\u6280\u672f<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>P2P\u7cfb\u7edf\u7684<strong>\u7d22\u5f15<\/strong>\uff1a\u662f\u4fe1\u606f\u5230\u8282\u70b9\u4f4d\u7f6e\uff08IP\u5730\u5740+\u7aef\u53e3\u53f7\uff09\u7684\u6620\u5c04\u3002<\/p>\n<\/blockquote>\n\n\n\n<p>\u6587\u4ef6\u5171\u4eab\/\u5206\u53d1\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5229\u7528\u7d22\u5f15\u52a8\u6001\u8ddf\u8e2a\u8282\u70b9\u6240\u5171\u4eab\u7684\u6587\u4ef6\u7684\u4f4d\u7f6e<\/li>\n\n\n\n<li>\u8282\u70b9\u9700\u8981\u544a\u8bc9\u7d22\u5f15\u5b83\u62e5\u6709\u54ea\u4e9b\u6587\u4ef6<\/li>\n\n\n\n<li>\u8282\u70b9\u641c\u7d22\u7d22\u5f15\uff0c\u4ece\u800c\u83b7\u77e5\u80fd\u591f\u5f97\u5230\u54ea\u4e9b\u6587\u4ef6<\/li>\n<\/ul>\n\n\n\n<p>\u5373\u65f6\u6d88\u606f\uff08QQ\uff09<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7d22\u5f15\u8d1f\u8d23\u5c06\u7528\u6237\u540d\u6620\u5c04\u5230\u5177\u4f53\u4f4d\u7f6e<\/li>\n\n\n\n<li>\u5f53\u7528\u6237\u540d\u5f00\u542fIM\u5e94\u7528\uff08\u5373\u65f6\u901a\u8baf\u8f6f\u4ef6\uff09\u65f6\uff0c\u9700\u8981\u901a\u77e5\u7d22\u5f15\u5b83\u7684\u4f4d\u7f6e<\/li>\n\n\n\n<li>\u8282\u70b9\u68c0\u7d22\u7d22\u5f15\uff0c\u786e\u5b9a\u7528\u6237\u7684IP\u5730\u5740<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><em>\u96c6\u4e2d\u5f0f\u7d22\u5f15<\/em><\/h4>\n\n\n\n<p>Napster\u6700\u65e9\u91c7\u7528\u8fd9\u79cd\u8bbe\u8ba1\u3002\u8fd9\u79cd\u8bbe\u8ba1\u91cc\u4f1a\u6709\u4e00\u4e2a<em>\u4e2d\u592e\u76ee\u5f55\u670d\u52a1\u5668<\/em>\uff0c\u4efb\u4f55\u8282\u70b9\u52a0\u5165\uff0c\u90fd\u4f1a\u901a\u77e5\u4e2d\u592e\u670d\u52a1\u5668\u5b83\u7684IP\u5730\u5740\u548c\u5b83\u7684\u5185\u5bb9\u3002\u5f53\u67d0\u4e2a\u8282\u70b9\u8981\u67e5\u627e\u5185\u5bb9\uff0c\u76f4\u63a5\u627e\u4e2d\u592e\u670d\u52a1\u5668\uff0c\u670d\u52a1\u5668\u544a\u8bc9\u5b83\u8c01\u6709\u8fd9\u4e2a\u6587\u4ef6\uff0c\u8fd9\u4e2a\u8282\u70b9\u5c31\u4f1a\u76f4\u63a5\u8fde\u4e0a\u62e5\u6709\u8fd9\u4e2a\u6587\u4ef6\u7684\u8282\u70b9\uff0c\u4e5f\u5c31\u662fP2P\u7684\u5e94\u7528\u5566~<\/p>\n\n\n\n<p>\u8fd9\u4e2a\u8bbe\u8ba1\u7684\u95ee\u9898\u5c31\u662f\u7531\u4e8e\u5185\u5bb9\u548c\u6587\u4ef6\u4f20\u8f93\u662f\u5206\u5e03\u5f0f\u7684\uff0c\u4f46\u662f\u5185\u5bb9\u5b9a\u4f4d\u662f\u9ad8\u5ea6\u96c6\u4e2d\u5f0f\u7684\uff0c\u5f53\u4e2d\u592e\u76ee\u5f55\u670d\u52a1\u5668\u6302\u4e86\uff0c\u4f1a\u5b58\u5728<em>\u5355\u70b9\u5931\u6548\u95ee\u9898<\/em>\u3001\u5927\u91cf\u8bf7\u6c42\u5bfc\u81f4<em>\u6027\u80fd\u74f6\u9888<\/em>\u95ee\u9898\u3001\u56e0<em>\u7248\u6743\u95ee\u9898<\/em>\u53d7\u4e3e\u62a5\u6253\u51fb\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5206\u5e03\u5f0f\u7d22\u5f15\u7cfb\u7edf\uff1a\u6d2a\u6cdb\u5f0f\u67e5\u8be2<\/h4>\n\n\n\n<p>\u91c7\u7528\u5b8c\u5168\u5206\u5e03\u5f0f\u67b6\u6784\uff0c\u6587\u4ef6\u5171\u4eab\u7f51\u7edcGnutella\u91c7\u7528\u8fd9\u79cd\u67b6\u6784\uff0c\u6bcf\u4e2a\u8282\u70b9\u5bf9\u5b83\u5171\u4eab\u7684\u6587\u4ef6\u8fdb\u884c\u7d22\u5f15\u670d\u52a1\uff0c\u4e14\u53ea\u5bf9\u5b83\u5171\u4eab\u7684\u6587\u4ef6\u8fdb\u884c\u7d22\u5f15\u3002\u6ca1\u4e86\u4e2d\u592e\u670d\u52a1\u5668\uff0c\u8be5\u600e\u4e48\u5bfb\u627e\u9700\u8981\u7684\u6587\u4ef6\u5462\uff1f\u5c31\u9760\u6d2a\u6cdb\u5f0f\u67e5\u8be2\u4e86\uff0c\u53d1\u51fa\u67e5\u8be2\u7684\u8282\u70b9\u901a\u8fc7\u5df2\u6709\u7684TCP\u8fde\u63a5\u5411\u8fde\u63a5\u4e0a\u7684\u8282\u70b9\u53d1\u9001\u67e5\u8be2\u6d88\u606f\uff0c\u63a5\u6536\u67e5\u8be2\u6d88\u606f\u7684\u8282\u70b9\u4f1a\u8f6c\u53d1\u7ed9\u5b83\u5bf9\u5e94\u8fde\u63a5\u4e0a\u7684\u8282\u70b9\uff0c\u4e00\u6b21\u6b21\u8f6c\u53d1\u67e5\u8be2\u76f4\u81f3\u67e5\u8be2\u547d\u4e2d\uff0c\u5c31\u53cd\u5411\u8def\u5f84\u53d1\u56de\u7ed9\u67e5\u8be2\u8282\u70b9\u3002<\/p>\n\n\n\n<p>\u7f3a\u70b9\u662f\u4f1a\u7ed9\u7f51\u7edc\u5e26\u6765\u5f88\u5927\u7684\u8d1f\u62c5\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5c42\u6b21\u5f0f\u8986\u76d6\u7f51\u7edc<\/h4>\n\n\n\n<p>\u7b2c\u4e09\u79cd\u7d22\u5f15\u65b9\u6848\u662f\u4ecb\u4e8e\u96c6\u4e2d\u5f0f\u7d22\u5f15\u548c\u6d2a\u8303\u67e5\u8be2\u4e4b\u95f4\u7684\u65b9\u6cd5\uff0c\u6bcf\u4e2a\u8282\u70b9\u53ef\u80fd\u662f\u4e00\u4e2a\u8d85\u7ea7\u8282\u70b9\uff0c\u4e5f\u53ef\u80fd\u662f\u4e00\u4e2a\u88ab\u5206\u914d\u4e00\u4e2a\u8d85\u7ea7\u8282\u70b9\u7684\u666e\u901a\u8282\u70b9\uff0c\u8fd9\u4e9b\u8282\u70b9\u95f4\u7ef4\u6301TCP\u8fde\u63a5\u3002<strong>\u8d85\u7ea7\u8282\u70b9\u8d1f\u8d23\u8ddf\u8e2a\u5b50\u8282\u70b9\u7684\u5185\u5bb9\uff0c\u4e3a\u5b50\u8282\u70b9\u63d0\u4f9b\u7d22\u5f15\u670d\u52a1\u3002\u8d85\u7ea7\u8282\u70b9\u4e4b\u95f4\u518d\u4f7f\u7528\u6d2a\u6cdb\u5f0f\u67e5\u8be2\u3002<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">P2P\u6848\u4f8b\u5e94\u7528\uff1aSkype<\/h3>\n\n\n\n<p><em>Skype<\/em>\u662f\u4e00\u6b3e\u5373\u65f6\u901a\u8baf\u8f6f\u4ef6\uff0c\u5176\u5177\u5907IM\u6240\u9700\u7684\u529f\u80fd\uff0c\u6bd4\u5982\u89c6\u9891\u804a\u5929\u3001\u591a\u4eba\u8bed\u97f3\u4f1a\u8bae\u3001\u591a\u4eba\u804a\u5929\u3001\u4f20\u9001\u6587\u4ef6\u3001\u6587\u5b57\u804a\u5929\u7b49\u529f\u80fd\u3002\u5b83\u7684\u672c\u8d28\u4e0a\u662fP2P\u7684\u5e94\u7528\uff0c\u7528\u6237\u548c\u8282\u70b9\u5bf9\u4e4b\u95f4\u76f4\u63a5\u901a\u4fe1\uff1b\u4f7f\u7528\u79c1\u6709\u5e94\u7528\u5c42\u534f\u8bae\uff0c\u6240\u4ee5\u6211\u4eec\u4e0d\u77e5\u9053\u5185\u90e8\u7684\u5177\u4f53\u5b9e\u73b0\u903b\u8f91\u3002\u91c7\u7528\u5c42\u6b21\u5f0f\u8986\u76d6\u7f51\u7edc\u67b6\u6784\uff1b\u7d22\u5f15\u8d1f\u8d23\u7ef4\u62a4\u7528\u6237\u540d\u4e0eIP\u5730\u5740\u95f4\u7684\u6620\u5c04\uff0c\u7d22\u5f15\u5206\u5e03\u5728\u8d85\u7ea7\u8282\u70b9\u4e0a\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Socket\u7f16\u7a0b-\u5e94\u7528\u7f16\u7a0b\u63a5\u53e3\uff08API\uff09<\/h2>\n\n\n\n<p>\u73b0\u5982\u4eca\uff0c\u6211\u4eec\u60f3\u5f00\u53d1\u4e00\u4e2a\u7f51\u7edc\u7a0b\u5e8f\u5e94\u7528\uff0c\u6709\u54ea\u4e9b\u65b9\u5f0f\uff1f\u6bd4\u5982\u76f4\u63a5\u7f51\u5361\u7f16\u7a0b\uff0c\u518d\u6216\u8005\u5c4f\u853d\u7f51\u5361\u7ec6\u8282\u7684\u57fa\u4e8ePacket Driver\u7f16\u7a0b\uff0cWindows\u63d0\u4f9b\u7684\u57fa\u4e8eNDIS\u7f51\u7edc\u7f16\u7a0b\uff1b\u57fa\u4e8e\u5404\u79cd\u51fd\u6570\u5e93LibPcap\/WinPcap\u7f16\u7a0b\uff1b\u4f1a\u8bdd\u5c42\u7528NetBIOS\u7f16\u7a0b\u7b49\u7b49&#8230;&#8230;\u8fd8\u6709\u4e00\u4e2a\u91cd\u70b9\u5c31\u662f\u5e94\u7528\u5c42\u548c\u4f20\u8f93\u5c42\u4e4b\u95f4\u63d0\u4f9b\u7684\u5e94\u7528\u7a0b\u5e8f\u63a5\u53e3\u2014\u2014\u5957\u63a5\u5b57\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/52\u5e94\u7528\u7a0b\u5e8f\u8bbe\u8ba1\u63a5\u53e3-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"884\" height=\"303\" data-original=\"http:\/\/qqiukulele.cn\/wp-content\/uploads\/2021\/04\/52\u5e94\u7528\u7a0b\u5e8f\u8bbe\u8ba1\u63a5\u53e3-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-528\"  sizes=\"auto, (max-width: 884px) 100vw, 884px\" \/><\/div><figcaption class=\"wp-element-caption\">\u5e94\u7528\u7f16\u7a0b\u63a5\u53e3<\/figcaption><\/figure>\n\n\n\n<p><img decoding=\"async\" src=\"\"><strong>\u5e94\u7528\u7f16\u7a0b\u63a5\u53e3API\uff08Application Programming Interface\uff09<\/strong>\uff1a\u5c31\u662f\u5e94\u7528\u8fdb\u7a0b\u7684\u63a7\u5236\u6743\u548c\u64cd\u4f5c\u7cfb\u7edf\u7684\u63a7\u5236\u6743\u8fdb\u884c\u8f6c\u6362\u7684\u4e00\u4e2a\u7cfb\u7edf\u8c03\u7528\u63a5\u53e3\u3002\u6bcf\u4e2a\u7aef\u7cfb\u7edf\u53ef\u4ee5\u770b\u4f5c\u662f\u4e00\u4e2a\u4e94\u5c42\u7ed3\u6784\u7684\u5c0f\u7cfb\u7edf\uff0c\u4e0d\u540c\u7aef\u7684\u5e94\u7528\u5c42\u91cc\u7684\u5e94\u7528\u8fdb\u7a0b\u4ea4\u6d41\u9700\u8981\u9075\u5faa\u5e94\u7528\u5c42\u534f\u8bae\uff0c\u4f46\u662f\u5b83\u7edd\u5bf9\u4e0d\u662f\u76f4\u63a5\u4ece\u6211\u7684\u5e94\u7528\u5c42\u201c\u98de\u201d\u53bb\u53e6\u4e00\u4e2a\u5e94\u7528\u5c42\uff0c\u800c\u662f\u8981\u8fc7\u4e00\u904d5\u5c42\u7f51\u7edc\u7ed3\u6784\uff0c\u6240\u4ee5\u5957\u63a5\u5b57\u4e00\u822c\u503c\u5e94\u7528\u5c42\u548c\u5b83\u7684\u76f8\u90bb\u5c42\u2014\u2014\u4f20\u8f93\u5c42\u7684\u63a5\u53e3\u3002\u901a\u8fc7\u8fd9\u4e2a\u63a5\u53e3\uff0c\u5e94\u7528\u5c42\u7684\u6570\u636e\u5c31\u53ef\u4ee5\u4ea4\u7ed9\u4e0b\u4e00\u5c42\u4e86\u3002<\/p>\n\n\n\n<p>\u51e0\u79cd\u5178\u578b\u7684\u5e94\u7528\u7f16\u7a0b\u63a5\u53e3\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Berkeley UNIX\u64cd\u4f5c\u7cfb\u7edf\u5b9a\u4e49\u4e86\u4e00\u79cdAPI\uff0c\u79f0\u4e3a\u5957\u63a5\u5b57\u63a5\u53e3\uff08socket interface\uff09\uff0c\u7b80\u79f0<strong>\u5957\u63a5\u5b57\uff08socket\uff09<\/strong>\uff0c\u4e5f\u662f\u73b0\u5728\u5e94\u7528\u6700\u5e7f\u6cdb\u7684\u3002<\/li>\n\n\n\n<li>\u5fae\u8f6f\u516c\u53f8\u5728\u5176\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u91c7\u7528\u4e86\u5957\u63a5\u5b57\u63a5\u53e3API\uff0c\u5f62\u6210\u4e86\u4e00\u4e2a\u7a0d\u6709\u4e0d\u540c\u7684API\uff0c\u5e76\u79f0\u4e4b\u4e3aWindows Socket Interface\uff0cWINSOCK\u3002<\/li>\n\n\n\n<li>AT&amp;T\u4e3a\u5176UNIX\u7cfb\u7edfV\u5b9a\u4e49\u4e86\u4e00\u79cdAPI\uff0c\u7b80\u5199\u4e3aTLI<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Socket API<\/h3>\n\n\n\n<p>\u5957\u63a5\u5b57API\u6700\u521d\u662f\u9762\u5411TCP\/IP\u534f\u8bae\u6808\u7684\u63a5\u53e3\uff0c\u76ee\u524d\u7edd\u5927\u591a\u6570\u64cd\u4f5c\u7cfb\u7edf\u90fd\u652f\u6301\u3002\u7ed9\u6211\u4eec\u63d0\u4f9b\u4e86\u5f00\u53d1C\/S\u5e94\u7528\u7684\u5f88\u597d\u7684\u624b\u6bb5\uff0c\u662f\u5e94\u7528\u8fdb\u7a0b\u95f4\u901a\u4fe1\u7684\u62bd\u8c61\u673a\u5236\u3002<\/p>\n\n\n\n<p>\u95ee\u9898\u6765\u4e86\uff0c\u6211\u600e\u4e48\u77e5\u9053\u6211\u5bf9\u5916\u8981\u548c\u54ea\u4e00\u4e2a\u670d\u52a1\u5668\u5957\u63a5\u5b57\u8fdb\u884c\u4ea4\u6d41\uff1f<\/p>\n\n\n\n<p>\u7b54\uff1a\u9996\u5148\u60f3\u5230IP\u5730\u5740\uff0c\u4f46\u662f\u53ef\u80fd\u6709\u591a\u4e2a\u5957\u63a5\u5b57\uff0c\u6240\u4ee5\u6211\u4eec\u7ed9\u5957\u63a5\u5b57\u4e2a\u53f7\u7801\uff0c\u4e5f\u5c31\u662f\u6211\u4eec\u5e38\u8bf4\u7684\u7aef\u53e3\u53f7\uff0c\u603b\u7ed3\u6765\u8bf4\uff0c<strong>\u5957\u63a5\u5b57\u5bf9\u5916\u552f\u4e00\u6807\u8bc6\u901a\u4fe1\u7aef\u70b9\u7684\u65b9\u5f0f\uff1aIP\u5730\u5740+\u7aef\u53e3\u53f7\u3002<\/strong><\/p>\n\n\n\n<p>\u7b2c\u4e8c\u4e2a\u95ee\u9898\uff0c\u64cd\u4f5c\u7cfb\u7edf\/\u8fdb\u7a0b\uff08\u5bf9\u5185\uff09\u5982\u4f55\u7ba1\u7406\u90a3\u4e48\u591a\u7684\u5957\u63a5\u5b57\uff1f<\/p>\n\n\n\n<p>\u7b54\uff1a\u901a\u8fc7<strong>\u5957\u63a5\u5b57\u63cf\u8ff0\u7b26<\/strong>\u3002\u5c5e\u4e8e\u4e00\u79cdSocket\u62bd\u8c61\uff0c\u7c7b\u4f3c\u4e8e\u6587\u4ef6\u7684\u62bd\u8c61\uff0c\u628a\u5957\u63a5\u5b57\u770b\u4f5c\u4e00\u79cd\u7279\u6b8a\u6587\u4ef6\u3002\u5f53\u5e94\u7528\u8fdb\u7a0b\u521b\u5efa\u5957\u63a5\u5b57\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u5206\u914d\u4e00\u4e2a\u6570\u636e\u7ed3\u6784\u5b58\u50a8\u8be5\u5957\u63a5\u5b57\u76f8\u5173\u4fe1\u606f\uff0c\u521b\u5efa\u5957\u63a5\u5b57\u540e\u4f1a\u8fd4\u56de\u5957\u63a5\u5b57\u63cf\u8ff0\u7b26\u3002\u5728\u7ba1\u7406\u5957\u63a5\u5b57\u65f6\uff0c\u90fd\u662f\u5728\u4f7f\u7528\u8fd9\u4e2a\u63cf\u8ff0\u7b26\u8fdb\u884c\u7ba1\u7406\u6216\u5f15\u7528\u3002<\/p>\n\n\n\n<p>\u5728\u5957\u63a5\u5b57API\u91cc\u5b9a\u4e49\u4e86\u5730\u5740\u7ed3\u6784sockaddr_in\uff0c\u5305\u62ecIP\u5730\u5740\u548c\u7aef\u53e3\u53f7\uff0c\u8fd8\u6709\u5730\u5740\u7ec4\u7b49\u7b49\u3002\u4f7f\u7528TCP\/IP\u534f\u8bae\u7c07\u7684\u7f51\u7edc\u5e94\u7528\u7a0b\u5e8f\u58f0\u660e\u7aef\u70b9\u5730\u5740\u53d8\u91cf\uff08\u8d4bAF_INET\uff09\u65f6,\u4f7f\u7528\u7ed3\u6784sockaddr_in\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\u5730\u5740\u7ed3\u6784\uff1a<br>struct sockaddr_in<br>    {<br>        u_char sin_len;             \/*\u5730\u5740\u957f\u5ea6 *\/<br>        u_char sin_family;          \/*\u5730\u5740\u65cf(TCP\/IP\uff1aAF_INET) *\/<br>        u_short sin_port;           \/*\u7aef\u53e3\u53f7 *\/<br>        struct in_addr sin_addr;    \/*IP\u5730\u5740 *\/<br>        char sin_zero[8];           \/*\u672a\u7528(\u7f6e0) *\/<br>    }<\/pre>\n\n\n\n<p><strong>\u4e00\u4e9bSocket API\u51fd\u6570\uff08WinSock\uff09<\/strong>\uff1aWSAStartup\uff08\u521d\u59cb\u5316Windows Sockerts API\uff09-&gt; \u5e94\u7528\u7a0b\u5e8f -&gt; WSACleanup\uff08\u91ca\u653e\u6240\u4f7f\u7528\u7684Windows Sockets DLL\uff09<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>WSAStartup\uff1a\u4f7f\u7528Socket\u7684\u5e94\u7528\u7a0b\u5e8f\u5728\u4f7f\u7528Socket\u4e4b\u524d\u5fc5\u987b\u9996\u5148\u8c03\u7528WSAStartup\u51fd\u6570\u3002\u4e3b\u8981\u6709\u4e24\u4e2a\u53c2\u6570\u3002<\/li>\n\n\n\n<li>WSACleanup\u51fd\u6570\uff1a\u5e94\u7528\u7a0b\u5e8f\u5728\u5b8c\u6210\u5bf9\u8bf7\u6c42\u7684Socket\u5e93\u7684\u4f7f\u7528\uff0c\u6700\u540e\u8981\u8c03\u7528WSACleanup\u51fd\u6570\u6765\u89e3\u9664\u4e0eSocket\u5e93\u7684\u7ed1\u5b9a\uff0c\u91ca\u653eSocket\u5e93\u6240\u5360\u7528\u7684\u7cfb\u7edf\u8d44\u6e90\u3002<\/li>\n\n\n\n<li>Closesocket\u51fd\u6570\uff1a\u5173\u95ed\u4e00\u4e2a\u63cf\u8ff0\u7b26\u4e3asd\u7684\u5957\u63a5\u5b57\uff0c\u5982\u679c\u591a\u4e2a\u8fdb\u7a0b\u5171\u4eab\u4e00\u4e2a\u5957\u63a5\u5b57\uff0c\u8c03\u7528closesocket\u5c06\u5957\u63a5\u5b57\u5f15\u7528\u8ba1\u6570\u51cf1\uff0c\u51cf\u81f30\u624d\u5173\u95ed\u3002\u5982\u679c\u8fdb\u7a0b\u4e2d\u7684\u4e00\u4e2a\u7ebf\u7a0b\u8c03\u7528closesocket\u5c06\u4e00\u4e2a\u5957\u63a5\u5b57\u5173\u95ed\uff0c\u8be5\u8fdb\u7a0b\u4e2d\u7684\u5176\u4ed6\u7ebf\u7a0b\u4e5f\u5c06\u4e0d\u80fd\u8bbf\u95ee\u8be5\u5957\u63a5\u5b57\u3002 \/\/ \u8c03\u7528\u683c\u5f0f<br>int closesocket(SOCKET sd);<br>\u8fd4\u56de\u503c\uff1a0\uff1a\u6210\u529f \uff1bSOCKET_ERROR\uff1a\u5931\u8d25<\/li>\n\n\n\n<li>connect\u51fd\u6570\uff1a\u5ba2\u6237\u7a0b\u5e8f\u8c03\u7528connect\u51fd\u6570\u6765\u4f7f\u5ba2\u6237\u5957\u63a5\u5b57\uff08sd\uff09\u4e0e\u7279\u5b9a\u8ba1\u7b97\u673a\u7684\u7279\u5b9a\u7aef\u53e3\uff08saddr\uff09\u7684\u5957\u63a5\u5b57\uff08\u670d\u52a1\uff09\u8fdb\u884c\u8fde\u63a5\uff08\u7528\u4e8eTCP\u5efa\u7acb\u8fde\u63a5\uff09\uff0c\u7528\u4e8e\u5ba2\u6237\u7aef\uff0c\u65e2\u53ef\u7528\u4e8eTCP\u5ba2\u6237\u7aef\u4e5f\u53ef\u4ee5\u7528\u4e8eUDP\u5ba2\u6237\u7aef\u3002<\/li>\n\n\n\n<li>bind\u51fd\u6570\uff1a\u7ed1\u5b9a\u5957\u63a5\u5b57\u7684\u672c\u5730\u7aef\u70b9\u5730\u5740\uff1aIP\u5730\u5740+\u7aef\u53e3\u53f7\u3002int bind(sd, localaddr, addrlen);<\/li>\n\n\n\n<li>\u8fd8\u6709\u597d\u591aSocket API\u963f~~\u90a3\u5c31\u76f4\u63a5\u770b\u770b\u7f51\u7edc\u5e94\u7528\u7684Socket API\uff08TCP\uff09\u8c03\u7528\u57fa\u672c\u6d41\u7a0b\uff1a<\/li>\n<\/ul>\n\n\n\n<p>\u5728\u901a\u8baf\u8fc7\u7a0b\u4e2d\uff0c\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u901a\u4fe1\uff0c\u6700\u5148\u53d1\u8d77API\u8c03\u7528\u7684\u662f\u670d\u52a1\u7aef\u3002\u5728WinSock\u73af\u5883\u4e0b\uff0c\u5148\u8c03\u7528\u7684\u662fWSAStartup\u51fd\u6570\uff0c\u521d\u59cb\u5316Windows Sockerts API\uff1bsocket\u51fd\u6570\u521b\u5efa\u5957\u63a5\u5b57\uff1bbind\u51fd\u6570\u4e3a\u5957\u63a5\u5b57\u7ed1\u5b9a\u7aef\u70b9\u5730\u5740\uff0c\u4f5c\u4e3aTCP\u670d\u52a1\u5668\u5957\u63a5\u5b57\uff1b\u8c03\u7528listen\u51fd\u6570\uff0c\u542f\u52a8\u76d1\u542c\uff0c\u6307\u5b9a\u961f\u5217\u957f\u5ea6\uff1b\u63a5\u7740\uff0c\u8c03\u7528accpet\u51fd\u6570\uff08\u963b\u585e\u51fd\u6570\uff09\u6765\u63a5\u6536\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\u3002\u63a5\u7740\u770b\u5ba2\u6237\u7aef\uff0c\u6700\u5148\u8c03\u7528\u7684\u4e5f\u662fWSAStartup\u51fd\u6570\uff0csocket\u51fd\u6570\u521b\u5efa\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\uff0c\u63a5\u4e0b\u6765\u5ba2\u6237\u7aef\u8c03\u7528connect\u51fd\u6570\uff08\u963b\u585e\u51fd\u6570\uff09\uff0c\u8c03\u7528\u6210\u529f\u540e\uff0c\u5ba2\u6237\u7aef\u5c31\u4e0e\u670d\u52a1\u5668\u53d1\u751f\u8054\u7cfb\u4e86~accept\u63a5\u6536\u5230connect\u51fd\u6570\u7684\u8fde\u63a5\u8bf7\u6c42\uff0c\u5c31\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5957\u63a5\u5b57\u4e0e\u5ba2\u6237\u7aef\u8fdb\u884c\u8fde\u63a5\u786e\u8ba4\u3002\u670d\u52a1\u5668\u4ee5\u540e\u4e5f\u4f1a\u7528\u8fd9\u4e2a\u65b0\u5957\u63a5\u5b57\u63a5\u6536\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\uff08recv\uff09\uff0c\u5ba2\u6237\u7aef\u4e5f\u4f1a\u901a\u8fc7\u8be5\u5957\u63a5\u5b57\u53d1\u9001\u8bf7\u6c42\uff08send\uff09\u3002\u53cd\u8fc7\u6765\uff0c\u5ba2\u6237\u7aef\u63a5\u6536\u670d\u52a1\u7aef\u901a\u4fe1\u4e5f\u540c\u7406\u3002\u6700\u540e\u901a\u4fe1\u7ed3\u675f\u4e86\uff0c\u53cc\u65b9\u90fd\u4f1a\u8c03\u7528closesocket\u51fd\u6570\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7f51\u7edc\u5b57\u8282\u987a\u5e8f\u8f6c\u6362\u51fd\u6570<\/h3>\n\n\n\n<p>TCP\/IP\u5b9a\u4e49\u4e86\u6807\u51c6\u7684\u7528\u4e8e\u534f\u8bae\u5934\u4e2d\u7684\u4e8c\u8fdb\u5236\u6574\u6570\u8868\u793a\uff1a\u7f51\u7edc\u5b57\u8282\u987a\u5e8f\u3002\u67d0\u4e9bSocket API\u51fd\u6570\u7684\u53c2\u6570\u9700\u8981\u5b58\u50a8\u4e3a\u7f51\u7edc\u5b57\u8282\u987a\u5e8f\uff08\u5982IP\u5730\u5740\u3001\u7aef\u53e3\u53f7\u7b49\uff09\uff0c\u5047\u5982\u7528\u4e86\u548c\u7f51\u7edc\u5b57\u8282\u987a\u5e8f\u4e0d\u4e00\u6837\u7684\u672c\u5730\u5b57\u8282\u987a\u5e8f\uff0c\u90a3\u5c31\u51fa\u9519\u4e86\u3002<\/p>\n\n\n\n<p>\u53ef\u4ee5\u5b9e\u73b0\u672c\u5730\u5b57\u8282\u987a\u5e8f\u4e0e\u7f51\u7edc\u5b57\u8282\u987a\u5e8f\u95f4\u8f6c\u6362\u7684\u51fd\u6570\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>htons: \u672c\u5730\u5b57\u8282\u987a\u5e8f\u2192\u7f51\u7edc\u5b57\u8282\u987a\u5e8f(16bits)<\/li>\n\n\n\n<li>ntohs: \u7f51\u7edc\u5b57\u8282\u987a\u5e8f\u2192\u672c\u5730\u5b57\u8282\u987a\u5e8f(16bits)<\/li>\n\n\n\n<li>htonl: \u672c\u5730\u5b57\u8282\u987a\u5e8f\u2192\u7f51\u7edc\u5b57\u8282\u987a\u5e8f(32bits)<\/li>\n\n\n\n<li>ntohl: \u7f51\u7edc\u5b57\u8282\u987a\u5e8f\u2192\u672c\u5730\u5b57\u8282\u987a\u5e8f(32bits)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Socket\u7f16\u7a0b\u2014\u2014\u5ba2\u6237\u7aef\u8f6f\u4ef6\u8bbe\u8ba1<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u89e3\u6790\u670d\u52a1\u5668IP\u5730\u5740<\/h3>\n\n\n\n<p>\u5ba2\u6237\u7aef\u4f7f\u7528\u57df\u540d\u6216IP\u5730\u5740\u6807\u8bc6\u670d\u52a1\u5668\uff0cIP\u534f\u8bae\u9700\u8981\u4f7f\u752832\u4f4d\u4e8c\u8fdb\u5236IP\u5730\u5740\u3002\u5ba2\u6237\u7aef\u9700\u8981\u5c06\u57df\u540d\u6216IP\u5730\u5740\u8f6c\u6362\u4f4d32\u4f4dIP\u5730\u5740\uff0c\u53ef\u4ee5\u8c03\u7528\u4e24\u4e2a\u51fd\u6570\uff0c\u5f97\u5230\u7684\u662f\u7f51\u7edc\u5b57\u8282\u987a\u5e8f\uff0c\u5c31\u53ef\u4ee5\u76f4\u63a5\u5411\u5957\u63a5\u5b57API\u4f20\u9012\u53c2\u6570\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u51fd\u6570inet_addr( ) \u5b9e\u73b0\u7528\u6237\u8f93\u5165\u7684\u70b9\u5206\u5341\u8fdb\u5236IP\u5730\u5740\u523032\u4f4dIP\u5730\u5740\u8f6c\u6362<\/li>\n\n\n\n<li>\u51fd\u6570gethostbyname( ) \u5b9e\u73b0\u7528\u6237\u8f93\u5165\u7684\u57df\u540d\u89e3\u6790\/\u6620\u5c04\u523032\u4f4dIP\u5730\u5740\u8f6c\u6362\uff0c\u8fd4\u56de\u4e00\u4e2a\u6307\u5411\u7ed3\u6784hostent \u7684\u6307\u9488<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u89e3\u6790\u670d\u52a1\u5668\uff08\u719f\u77e5\uff09\u7aef\u53e3\u53f7<\/h3>\n\n\n\n<p>\u5ba2\u6237\u7aef\u6ca1\u76f4\u63a5\u7ed9\u51fa\u6307\u5b9a\u7684\u7aef\u53e3\u53f7\uff0c\u6bd4\u5982\u53ef\u80fd\u4f7f\u7528\u670d\u52a1\u540d\uff08\u5982HTTP\uff09\u6807\u8bc6\u670d\u52a1\u5668\u7aef\u53e3\uff0c\u6240\u4ee5\u9700\u8981\u5c06\u670d\u52a1\u540d\u8f6c\u6362\u4e3a\u719f\u77e5\u7aef\u53e3\u53f7\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u51fd\u6570getservbyname( )\uff0c\u8fd4\u56de\u4e00\u4e2a\u6307\u5411\u7ed3\u6784servent\u7684\u6307\u9488<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u89e3\u6790\u534f\u8bae\u53f7<\/h3>\n\n\n\n<p>\u6240\u4ee5\u534f\u8bae\u90fd\u5229\u7528\u534f\u8bae\u53f7\u8fdb\u884c\u6807\u8bc6\uff0c\u5ba2\u6237\u7aef\u53ef\u80fd\u66f4\u5e38\u4f7f\u7528\u534f\u8bae\u540d\uff08\u5982\uff1aTCP\uff09\u6307\u5b9a\u534f\u8bae\uff0c\u6240\u4ee5\u5ba2\u6237\u7aef\u8f6f\u4ef6\u9700\u8981\u8c03\u7528\u51fd\u6570\u5c06\u534f\u8bae\u540d\u8f6c\u6362\u4e3a\u534f\u8bae\u53f7\uff08\u5982\uff1a6\uff09\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u51fd\u6570getprotobyname ( ) \u5b9e\u73b0\u534f\u8bae\u540d\u5230\u534f\u8bae\u53f7\u7684\u8f6c\u6362<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">TCP\u8f6f\u4ef6\u5ba2\u6237\u7aef\u8f6f\u4ef6\u6d41\u7a0b<\/h3>\n\n\n\n<ol 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