比特与字节
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定义
比特是最小的数字信息单位，表示0或1；字节由8个比特组成，可表示256个不同的值。
解释
Network speeds are quoted in bits per second (Mbps, Gbps), while file sizes use bytes (MB, GB)—a frequent source of confusion. A 100 Mbps internet connection transfers 100 megabits, or about 12.5 megabytes, per second. ASCII encodes each English character in 1 byte; a UTF-8 emoji typically requires 4 bytes. The 8-bit byte became standard in the 1960s with the IBM System/360.
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