上网流量的计算单位主要是MB、KB,单位之间的换算规则是:1MB=1024KB,1KB=1024B,1B(字节)=8bits(比特)。
而上网速率的计算单位则是“每秒兆比特(Mbps)”,也就是说1Mbps代表网速是“每秒1兆比特”,而并不是“每秒1兆字节”。
例如下载一个42MB的小视频,3G网速为42Mbps、21Mbps,则理论上需耗时8秒、16秒,而并不是1秒、2秒,实际速率也可能会因网络等因素会略低。
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