采用 tcp/ip 数据封装时，以下哪个端口号范围标识了所有常用应用程序 网络编程时可用端口号的范围是多少?
\u91c7\u7528 tcp/ip \u6570\u636e\u5c01\u88c5\u65f6\uff0c\u4ee5\u4e0b\u54ea\u4e2a\u7aef\u53e3\u53f7\u8303\u56f4\u6807\u8bc6\u4e86\u6240\u6709\u5e38\u7528\u5e94\u7528\u7a0b\u5e8f\u5e94\u8be5\u662f0-1023\uff0c\u8fd9\u4e2a\u662f\u4fdd\u7559\u8303\u56f4\uff0c\u57fa\u672c\u8986\u76d6\u4e86\u5e38\u7528\u534f\u8bae\u3002\u4f8b\u5982http\u662f80\u7aef\u53e3\uff0cftp\u662f20/21\u7aef\u53e3\uff0cdns\u662f53\u7aef\u53e3\uff0csmtp\u662f25\u7aef\u53e3\u7b49\u7b49\u3002
\u7aef\u53e3\u7684\u53d6\u503c\u8303\u56f4\u662f\uff1a0-65535\u3002
\u5728\u8fd9\u4e2a\u53d6\u503c\u8303\u56f4\u4e2d1023\u4ee5\u4e0b\u7684\u7aef\u53e3\u5df2\u7ecf\u5206\u914d\u7ed9\u4e86\u5e38\u7528\u7684\u4e00\u4e9b\u5e94\u7528\u7a0b\u5e8f\uff0c\u8fd9\u4e2a\u6570\u5b57\u4ee5\u540e\u7684\u7aef\u53e3\u90e8\u5206\u88ab\u4f7f\u7528\uff0c\u6240\u4ee5\u7f51\u7edc\u7f16\u7a0b\u53ef\u7528\u7684\u7aef\u53e3\u4e00\u822c\u57281024\u4e4b\u540e\u9009\u53d6\u3002
\u5728\u7f51\u7edc\u6280\u672f\u4e2d\uff0c\u7aef\u53e3(Port)\u5927\u81f4\u6709\u4e24\u79cd\u610f\u601d\uff1a
1\u3001\u7269\u7406\u610f\u4e49\u4e0a\u7684\u7aef\u53e3\uff0c\u6bd4\u5982\uff0cADSL Modem\u3001\u96c6\u7ebf\u5668\u3001\u4ea4\u6362\u673a\u3001\u8def\u7531\u5668\u7528\u4e8e\u8fde\u63a5\u5176\u4ed6\u7f51\u7edc\u8bbe\u5907\u7684\u63a5\u53e3\uff0c\u5982RJ-45\u7aef\u53e3\u3001SC\u7aef\u53e3\u7b49\u7b49\uff1b
2\u3001\u903b\u8f91\u610f\u4e49\u4e0a\u7684\u7aef\u53e3\uff0c\u4e00\u822c\u662f\u6307TCP/IP\u534f\u8bae\u4e2d\u7684\u7aef\u53e3\uff0c\u7aef\u53e3\u53f7\u7684\u8303\u56f4\u4ece0\u523065535\uff0c\u6bd4\u5982\u7528\u4e8e\u6d4f\u89c8\u7f51\u9875\u670d\u52a1\u768480\u7aef\u53e3\uff0c\u7528\u4e8eFTP\u670d\u52a1\u768421\u7aef\u53e3\u7b49\u7b49\u3002
\u6269\u5c55\u8d44\u6599\uff1a
\u5e38\u7528\u7684\u4fdd\u7559UDP\u7aef\u53e3\u53f7\u6709\uff1a
DNS 53\uff0cBootP 67\uff08server\uff09/ 68\uff08client\uff09\uff0cTFTP 69\uff0cSNMP 161\u7b49\u3002
\u6bcf\u4e2aTCP\u62a5\u6587\u5934\u90e8\u90fd\u5305\u542b\u6e90\u7aef\u53e3\u53f7\uff08source port\uff09\u548c\u76ee\u7684\u7aef\u53e3\u53f7\uff08destination port\uff09\uff0c\u7528\u4e8e\u6807\u8bc6\u548c\u533a\u5206\u6e90\u7aef\u8bbe\u5907\u548c\u76ee\u7684\u7aef\u8bbe\u5907\u7684\u5e94\u7528\u8fdb\u7a0b\u3002
\u5728TCP/IP\u534f\u8bae\u6808\u4e2d\uff0c\u6e90\u7aef\u53e3\u53f7\u548c\u76ee\u7684\u7aef\u53e3\u53f7\u5206\u522b\u4e0e\u6e90IP\u5730\u5740\u548c\u76ee\u7684IP\u5730\u5740\u7ec4\u6210\u5957\u63a5\u5b57\uff08socket\uff09\uff0c\u552f\u4e00\u7684\u786e\u5b9a\u4e00\u6761TCP\u8fde\u63a5\u3002
\u76f8\u5bf9\u4e8eTCP\u62a5\u6587\uff0cUDP\u62a5\u6587\u53ea\u6709\u5c11\u91cf\u7684\u5b57\u6bb5\uff1a\u6e90\u7aef\u53e3\u53f7\u3001\u76ee\u7684\u7aef\u53e3\u53f7\u3001\u957f\u5ea6\u3001\u6821\u9a8c\u548c\u7b49\uff0c\u5404\u4e2a\u5b57\u6bb5\u529f\u80fd\u548cTCP\u62a5\u6587\u76f8\u5e94\u5b57\u6bb5\u4e00\u6837\u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-\u7f51\u7edc\u7aef\u53e3
扩展阅读：www.sony.com.cn ... snmp ... telnet ip 端口 命令 ... tcpip模型分为哪四层 ... ip地址 ... tcp-ip ... 用别人的mac地址查询ip ... 两个m2插槽插哪个 ... tcp怎么设置ip ...
