1Mbps便是1兆比特,根据行业内的转换公式进行转换,它的下行速率是"128KB/s",早些年依靠电话线给予宽带的时期,很多宽带的带宽便是1Mbps或2Mbps,基于当时网络传输系统、布局,以吸线路的限制,网速一直无法提升,后来随着基建线路改造地完成,国内90%以上的地区都采用.上了光纤网,宽带带宽下限也从原来的1Mbps、2Mbps变成了50Mbps、100Mbps。
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