外网怎么回事

问题描述：

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以下是测试本机到外网的连接状况。请观察time的数值，单位是ms(毫秒)。
空闲时time值应为10ms~20ms。若time=100ms以上说明下载占用了较多带宽。
若每隔几行就出现Request time out说明传输不连续，网络软件容易掉线。
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Pinging 202.96.140.77 with 32 bytes of data:

Reply from 202.96.140.77: bytes=32 time=273ms TTL=116
Reply from 202.96.140.77: bytes=32 time=274ms TTL=116
Reply from 202.96.140.77: bytes=32 time=273ms TTL=116
Request timed out.
Request timed out.
Reply from 202.96.140.77: bytes=32 time=275ms TTL=116
Reply from 202.96.140.77: bytes=32 time=274ms TTL=116
Reply from 202.96.140.77: bytes=32 time=274ms TTL=116
Reply from 202.96.140.77: bytes=32 time=275ms TTL=116
Reply from 202.96.140.77: bytes=32 time=274ms TTL=116
Reply from 202.96.140.77: bytes=32 time=275ms TTL=116
Reply from 202.96.140.77: bytes=32 time=273ms TTL=116
Request timed out.
Reply from 202.96.140.77: bytes=32 time=275ms TTL=116
Reply from 202.96.140.77: bytes=32 time=275ms TTL=116
Request timed out.
Reply from 202.96.140.77: bytes=32 time=275ms TTL=116
Reply from 202.96.140.77: bytes=32 time=274ms TTL=116
Request timed out.
魔兽时偶尔掉线。下载速度一般不到400kb/s，2兆网通宽带，连接pppoe！世纪前线网速测试1.9兆平均，丢失包约20%。

问题解答：

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