中国目前总体处于窄带接入时期。据统计,目前通过普通Modem拨号接入Internet的用户占75％以上。“拨号上网”,顾名思义就是通过电话线以modem拨号的方式连入因特网。这种方式简单、方便,因此为大多数人所使用。但拨号上网速度较慢,经测试,只有在半夜以FTP方式传输资料时,才会在短时间内达到56K的速度,平时,速度大多只有十几Kbps甚 At present, China is generally in a narrowband access period. According to statistics, at present, more than 75% of users access the Internet through ordinary Modem dial-up. “Dial-up”, as its name implies, is connected to the Internet via modem dial-up. This method is simple and convenient and is therefore used by most people. But dial-up Internet access speed is slow, after testing, only in the middle of the night to transfer data by FTP, will be in a short period of time to reach 56K speed, usually, the speed is mostly only a dozen Kbps