{"id":303,"date":"2022-05-23T11:40:18","date_gmt":"2022-05-23T03:40:18","guid":{"rendered":"https:\/\/aaaahui.top\/?p=303"},"modified":"2022-08-13T21:24:51","modified_gmt":"2022-08-13T13:24:51","slug":"ttl","status":"publish","type":"post","link":"https:\/\/ahui.blog\/index.php\/2022\/05\/23\/ttl\/","title":{"rendered":"\u57fa\u7840\u5b66\u4e60\u8bb0\u5f55\u2014\u2014TTL\u3001\u6cdb\u89e3\u6790\u4e0e\u5b50\u57df\u540d\u6536\u96c6"},"content":{"rendered":"

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TTL\u662f\u4ec0\u4e48<\/h2>\n

\u8fd9\u91cc\u7684TTL\u6307\u7684\u662fDNS TTL\uff0cTTL\u4e0eDNS TTL\u6709\u533a\u522b\u3002\u4e8c\u8005\u90fd\u662f\u751f\u5b58\u65f6\u95f4\uff0c\u524d\u8005\u6307ICMP\u5305\u7684\u8f6c\u53d1\u6b21\u6570\uff08\u8df3\u6570\uff09\uff0c\u540e\u8005\u6307\u57df\u540d\u89e3\u6790\u4fe1\u606f\u5728DNS\u4e2d\u7684\u5b58\u5728\u65f6\u95f4\u3002<\/p>\n

IP\u6570\u636e\u5305\u4e2d\u7684TTL<\/strong><\/p>\n

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\u4e00\u884c\u8868\u793a 32 bit\uff084\u5b57\u8282\uff09\uff0c\u4f4d\u4ece0\u5f00\u59cb\u7f16\u53f7\uff0c\u53730~31\u3002<\/p>\n

\"\"<\/p>\n

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TTL\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u907f\u514dIP\u5305\u5728\u7f51\u7edc\u4e2d\u7684\u65e0\u9650\u5faa\u73af\u548c\u6536\u53d1\uff0c\u8282\u7701\u4e86\u7f51\u7edc\u8d44\u6e90\uff0c\u5e76\u80fd\u4f7fIP\u5305\u7684\u53d1\u9001\u8005\u80fd\u6536\u5230\u544a\u8b66\u6d88\u606f\u3002<\/p>\n

TTL \u662f\u7531\u53d1\u9001\u4e3b\u673a\u8bbe\u7f6e\u7684\uff0c\u4ee5\u9632\u6b62\u6570\u636e\u5305\u4e0d\u65ad\u5728IP\u4e92\u8054\u7f51\u7edc\u4e0a\u6c38\u4e0d\u7ec8\u6b62\u5730\u5faa\u73af\u3002\u8f6c\u53d1IP\u6570\u636e\u5305\u65f6\uff0c\u8981\u6c42\u8def\u7531\u5668\u81f3\u5c11\u5c06 TTL \u51cf\u5c0f 1\u3002<\/p>\n

TTL\u503c\u7684\u6ce8\u518c\u8868\u4f4d\u7f6eHKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters \u5176\u4e2d\u6709\u4e2aDefaultTTL\u7684DWORD\u503c\uff0c\u5176\u6570\u636e\u5c31\u662f\u9ed8\u8ba4\u7684TTL\u503c\u4e86\uff0c\u6211\u4eec\u53ef\u4ee5\u4fee\u6539\uff0c\u4f46\u4e0d\u80fd\u5927\u4e8e\u5341\u8fdb\u5236\u7684255\u3002Windows\u7cfb\u7edf\u8bbe\u7f6e\u540e\u91cd\u542f\u624d\u751f\u6548\u3002<\/p>\n

DNS TTL<\/strong><\/p>\n

\u4ee5\u6211\u7684\u535a\u5ba2\u57df\u540d\u4e3a\u4f8b<\/p>\n

\"\"<\/p>\n

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