Bit, byte, and word

Bit and byte

> The speed is bit, And the size is byte. (It is best to distinguish bit & byte from Upper/lower case)

> Bit, bit, basic unit of computer operation, which is the unit of length of the binary number; e.g. 10011001 is an 8-bit binary number; BPS = bits per second number of transmitted bytes per second;
Byte bytes, the basic unit of measurement for computer storage space; e.g. 480 standard interface transmission rate MBS: megabits/S = 60 megabits/s;

> One byte is stored in a computer as an octal number of digits, which is fixed, so 1 byte = 8 bits/s;

> Mbps = mega bits per second (second/second) is the speed unit; 480 Bytes/second = 480 Mbps;

> MB = mega bytes (MB) is the unit of measurement; 1 Mb/s = 8 mbps; 1 byte = 8 bits;

> Byte measurement unit
1kb (kilo) = 1024 bytes = 2 ^ 10 bytes;
1 MB (MEGA) = 1024kb = 2 ^ 20 bytes;
1 GB (Giga) = 1024 MB = 2 ^ 30 bytes;

> The former 56 K modem is converted to 7 Kbyte/s;

> MBS = 60 Mbit/s of USB2.0 is the theoretical transmission rate, which is subject to the constraints of the system environment (CPU, harddisk, memory). The actual read/write speed of the hard disk is about 11 ~ 16 Mb/s;
It is 10 times faster than 12mbs = 1.5 Mb/s of USB1.1; usb3.0 has reached 5 Gbps-625 Mb/s;

Word

> In addition to bytes, "word/word" is also used as the unit of measurement. It consists of several bytes. The number of digits of a word is called the length of the word, which is the length of the binary number corresponding to the word;
E.g. 64-bit systems use 64-bit binary to represent a word, 64/8 = 8 bytes constitute a word;
A 32-bit x86 system uses a 32-bit binary representation of a word, 32/8 = 4 bytes constitute a word;

<Refer to> http://sujian.blog.51cto.com/8838/4632

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[A lot of common sense is a vague concept at ordinary times, so it is easy to make mistakes. If you don't sort it out, you can't...]