{"id":110,"date":"2007-02-07T23:32:40","date_gmt":"2007-02-07T23:32:40","guid":{"rendered":""},"modified":"2007-02-07T23:32:40","modified_gmt":"2007-02-07T23:32:40","slug":"110","status":"publish","type":"post","link":"https:\/\/3v.org.cn\/?p=110","title":{"rendered":"\u4e86\u89e3ADSL\u771f\u6b63\u901f\u5ea6"},"content":{"rendered":"

1\uff0c512K ADSL\u662f\u4ec0\u4e48\u610f\u601d\uff1f<\/p>\n

512K=512Kbps=512K bits\/s=64K bytes\/s
\u6211\u60f3\u8fd9\u4e2a\u6362\u7b97\u5e94\u8be5\u6ca1\u4ec0\u4e48\u95ee\u9898\u3002<\/p>\n

2\uff0c64K bytes\/s\u610f\u5473\u7740\u4ec0\u4e48\uff1f<\/p>\n

\u3000\u3000\u8fd9\u4e2a64K\u7684\u771f\u6b63\u542b\u4e49\u662f\u201c\u4e2a\u4eba\u7528\u6237\u6240\u80fd\u72ec\u4eab\u7684\u6700\u5927\u4e0b\u8f7d\u5e26\u5bbd\u201d
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\u3000\u3000\u6ce8\u610f\u662f\u201c\u4e0d\u9ad8\u4e8e\u201d\uff0c\u90a3\u4e48\u4e5f\u5c31\u662f\u8bf4\u5f88\u591a\u65f6\u5019\u6211\u4eec\u7684\u4e13\u6709\u5e26\u5bbd\u53ef\u80fd\u5c0f\u4e8e64K\uff0c\u90a3\u6709\u53c8\u662f\u4e3a\u4ec0\u4e48\u5462\uff1f
\u3000\u3000\u4e8b\u5b9e\u4e0a\uff0c\u4e2d\u56fd\u7535\u4fe1\u7684ADSL\u662f\u8fd0\u884c\u5728ATM\u4e0a\u9762\uff0cATM\u5230chinanet\u8fb9\u7f18\u8def\u7531\u5668\u5e26\u5bbd\u662f155M\uff0c\u6bcf\u4e00\u4e2a\u8fb9\u7f18\u8def\u7531\u5668\u53ef\u4ee5\u8fde\u63a53000\u7528\u6237\uff0c\u5982\u679c\u8fd9\u4e9b\u7528\u6237\u540c\u65f6\u4e0a\u7f51\uff0c\u90a3\u4e48\u6bcf\u4e2a\u7528\u6237\u5176\u5b9e\u53ea\u670950k bit\/s\u7684\u5e26\u5bbd\uff0c\u4e5f\u5c31\u662f7K bytes\/s\uff0c\u52a0\u4e0a\u8def\u7531\u5668\u8870\u51cf\uff0c\u90a3\u4e48\u6700\u7ec8\u53ef\u80fd\u53ea\u6709\u666e\u901amodem\u7684\u901f\u5ea6\u4e86\u3002
\u3000\u3000\u5f53\u7136\u4ee5\u4e0a\u53ea\u662f\u5047\u60f3\u7684\u60c5\u51b5\uff0c\u6bd5\u7adf3000\u4eba\u540c\u65f6\u8fde\u5728\u4e00\u53f0\u8fb9\u7f18\u8def\u7531\u5668\u4e0a\u9762\u51e0\u4e4e\u662f\u4e0d\u53ef\u80fd\u7684\uff0c\u7535\u4fe1\u4e5f\u4e0d\u4f1a\u8ba9\u8def\u7531\u5668\u6ee1\u8d1f\u8377\u8fde\u63a5\u800c\u4f7f\u5f97\u901f\u5ea6\u4e0b\u964d\u5982\u6b64\u4e4b\u5de8\u3002
\u3000\u3000\u4f46\u662f\uff0c64K\u662f\u6700\u9ad8\u4e13\u6709\u5e26\u5bbd\u662f\u6bcb\u5eb8\u7f6e\u7591\u7684\u3002<\/p>\n

3\uff0c\u90a3\u4e3a\u4ec0\u4e48\u6211\u7684512K ADSL\u7ecf\u5e38\u53ef\u4ee5\u8fbe\u5230100K\u751a\u81f3200K\u4ee5\u4e0a\u7684\u4e0b\u8f7d\u901f\u5ea6\u5462\uff1f<\/p>\n

\u3000\u3000\u6211\u4eec\u641e\u6e05\u695a\u4e8664K\u662f\u6700\u5927\u4e13\u6709\u5e26\u5bbd\uff0c\u4f46\u4e0d\u7b49\u4e8e\u6700\u5927\u5e26\u5bbd\uff0c\u4e8b\u5b9e\u4e0a\u5728ADSL\u62e8\u53f7\u65f6\u5df2\u7ecf\u5206\u914d\u4e86\u5b9e\u9645\u7ea6\u7b49\u4e8e8Mbps\uff0c\u4e5f\u5c31\u662f1M bytes\/s\u7684\u4e0b\u8f7d\u5e26\u5bbd\uff0c\u53ea\u4e0d\u8fc7\u7535\u4fe1\u9650\u5236\u4e86\u6211\u4eec\u7684\u4e13\u6709\u5e26\u5bbd\u6700\u9ad864K\uff0c\u90a3\u4e48\u5f53\u8def\u7531\u5668\u8fde\u63a5\u7684\u7528\u6237\u8f83\u5c11\u7684\u65f6\u5019\uff0c\u6211\u4eec\u53ef\u4ee5\u83b7\u5f97\u4e00\u90e8\u5206\u8d85\u8fc7\u4e13\u6709\u5e26\u5bbd\u7684\u5171\u4eab\u5e26\u5bbd\uff08\u663e\u7136\u7535\u4fe1\u6ca1\u5fc5\u8981\u8ba9\u8fd9\u4e9b\u5e26\u5bbd\u95f2\u7f6e\uff09\uff0c\u5f53\u7136512K\u901f\u7387\u7684ADSL\u6c38\u8fdc\u4e0d\u53ef\u80fd\u901a\u8fc7\u5360\u7528\u5171\u4eab\u5e26\u5bbd\u8fbe\u52301M\/s\u7684\u4e0b\u8f7d\u901f\u5ea6\uff0c\u56e0\u4e3a\u6bd5\u7adf\u603b\u8fd8\u662f\u6709\u5f88\u591a\u4eba\u5728\u540c\u65f6\u4e0a\u7f51\uff0c\u800c\u4e14\u7535\u4fe1\u80af\u5b9a\u8fd8\u6709\u4e00\u4e9b\u5e73\u8861\u8d1f\u8f7d\u7684\u673a\u5236\u3002<\/p>\n

4\uff0cADSL\u4e0a\u4f20\u901f\u5ea6\u5bf9\u4e0b\u8f7d\u7684\u5f71\u54cd<\/p>\n

\u3000\u3000TCP\/IP\u89c4\u5b9a\uff0c\u6bcf\u4e00\u500b\u5c01\u5305\uff0c\u90fd\u9700\u8981\u6709acknowledge\u8baf\u606f\u7684\u56de\u4f20\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u4f20\u8f93\u7684\u8d44\u6599\uff0c\u9700\u8981\u6709\u4e00\u4e2a\u6536\u5230\u8d44\u6599\u7684\u8baf\u606f\u56de\u590d\uff0c\u624d\u80fd\u51b3\u5b9a\u540e\u9762\u7684\u4f20\u8f93\u901f\u5ea6\uff0c\u4e26\u51b3\u5b9a\u662f\u5426\u91cd\u65b0\u4f20\u8f93\u9057\u5931\u7684\u8d44\u6599\u3002
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\u3000\u3000\u6709\u8bd5\u9a8c\u8bc1\u660e\uff0c\u5f53\u4e0a\u4f20\u6ee1\u8f7d\u65f6\uff0c\u4e0b\u8f7d\u901f\u5ea6\u8bb2\u53d8\u4e3a\u7406\u60f3\u901f\u5ea6\u768440\uff05\uff0c\u8fd9\u5c31\u53ef\u4ee5\u89e3\u91ca\u4e3a\u4ec0\u4e48\u4e3a\u4ec0\u4e48\u5f88\u591a\u670b\u53cb\u7528BT\u4e0b\u8f7d\u7684\u65f6\u5019\u7a0d\u5fae\u9650\u901f\u53cd\u800c\u80fd\u591f\u83b7\u5f97\u66f4\u5927\u7684\u4e0b\u8f7d\u901f\u5ea6\u3002
\u3000\u3000\u65e2\u7136\u8fd9\u6837\u6211\u4eec\u5c31\u4e0d\u80fd\u8981\u6c42\u6240\u6709\u7684\u4eba\u90fd\u4e0d\u9650\u901f\uff0c\u56e0\u4e3a\u5bf9\u4e8eADSL\u7528\u6237\u6765\u8bf4\u8fd9\u662f\u5f88\u4e0d\u73b0\u5b9e\u7684\uff0c\u4e5f\u662f\u4e0d\u79d1\u5b66\u7684\u3002\u9002\u5f53\u7684\u9650\u901f\u662f\u6b63\u786e\u7684\u3002<\/p>\n

5\uff0cADSL\u7684\u901f\u5ea6\u968f\u7740\u8fde\u63a5\u65f6\u95f4\u7684\u5ef6\u957f\u800c\u9010\u6e10\u964d\u4f4e\u3002<\/p>\n

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\u3000\u3000\u90a3\u4e3a\u4ec0\u4e48\u8bf4ADSL\u7684\u901f\u5ea6\u4f1a\u8d8a\u6765\u8d8a\u6162\u5462\uff1f
\u3000\u3000\u8fd9\u662f\u56e0\u4e3a\u5373\u4f7f\u7528\u6237\u4e0d\u5173\u95ed\u8c03\u5236\u89e3\u8c03\u5668\u7684\u7535\u6e90\uff0c\u6709\u65f6ADSL\u94fe\u63a5\u4e5f\u4f1a\u968f\u65f6\u4e2d\u65ad\u3002\u6bd4\u5982\uff0c\u5728\u901a\u4fe1\u72b6\u6001\u56e0\u566a\u97f3\u589e\u52a0\u800c\u6076\u5316\uff0c\u9891\u7e41\u53d1\u751f\u9519\u8bef\u7684\u60c5\u51b5\u4e0b\u3002 \u94fe\u63a5\u4e2d\u65ad\u540e\uff0c\u9a6c\u4e0a\u5c31\u4f1a\u91cd\u65b0\u8fdb\u884c\u8c03\u8bd5\uff0c\u5e76\u91cd\u65b0\u786e\u5b9a\u94fe\u63a5\u3002\u4e0d\u8fc7\uff0c\u5982\u679c\u6b64\u65f6\u81f4\u4f7f\u94fe\u63a5\u4e2d\u65ad\u7684\u566a\u97f3\u4ecd\u7136\u5b58\u5728\u7684\u8bdd\uff0c\uff08\u8fd9\u4e00\u822c\u662f\u6bd4\u8f83\u5927\u7684\uff09\u91cd\u65b0\u94fe\u63a5\u540e\u7684\u901f\u5ea6\u5c31\u4f1a\u6bd4\u539f\u6765\u66f4\u4f4e\u3002\u7531\u4e8e\u8c03\u8bd5\u4e2d\u6240\u786e\u5b9a\u7684\u94fe\u63a5\u901f\u5ea6\u662f\u4e5f\u56fa\u5b9a\u7684\uff0c\u56e0\u6b64\u5373\u4fbf\u4e4b\u540e\u566a\u97f3\u6d88\u5931\u4ee5\u540e\uff0c\u94fe\u63a5\u901f\u5ea6\u4e5f\u4e0d\u4f1a\u63d0\u9ad8\u3002ADSL\u8c03\u5236\u89e3\u8c03\u5668\u4f7f\u7528\u65f6\u95f4\u8d8a\u957f\uff0c\u53d1\u751f\u8fd9\u79cd\u60c5\u51b5\u7684\u53ef\u80fd\u6027\u5c31\u8d8a\u9ad8\uff0c\u6240\u4ee5\u8fde\u63a5\u901f\u5ea6\u8d8a\u6765\u8d8a\u6162\u3002
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1\uff0c512K ADSL\u662f\u4ec0\u4e48\u610f\u601d\uff1f 512K=512Kbps=512K bits\/s=64K bytes\/s\u6211<\/p>\n

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