The relationship of byte, Word, bit, byte

This paper is reproduced from http://blog.csdn.net/wanlixingzhe/article/details/7107923

Word Word
BYTE byte
Bit
The length of a word

1 words = 2 bytes (1 word = 2 byte)
1 bytes = 8 bits (1 byte = 8bit)

Word length is 16.
The word length of a byte is 8

BPS is the abbreviation for bits per second. The transmission rate of general data machine and network communication is in "bps". such as 56Kbps, 100.0Mbps and so on.
BPS is the abbreviation of byte per second. Computers generally display speed in bps, such as 1Mbps, approximately 128 KBps.
The smallest unit in the bit computer memory, in a binary computer system, each bit can represent a 0 or 1 digit signal.
Byte A byte consists of 8 bits, representing one character (a~z), Number (0~9), or symbol (,.?! %&+-*/) is the basic unit of memory storage data, which requires two bytes for each Chinese character. When the memory capacity is too large, the bit is not enough, so there is the unit KB of the thousand tuples, the following is the correlation between the memory unit of calculation:

1 Byte = 8 Bits

1 KB = 1024 Bytes

1 MB = 1024 KB

1 GB = 1024 MB

USB2.0 Standard interface transfer rate. Many people have misinterpreted "480mbps" as 480 trillion/sec. In fact, this is wrong, in fact, "480mbps" should be "480 megabits/sec" or "480 megabits/sec", it equals "60 megabytes/sec", we see the gap.

This starts with bit and byte: bit and Byte are translated as "bits", which are measured units of data, bit= "bit" or "bit".
Byte= byte is 1byte=8bits, the conversion is 1:8 of the relationship.
Mbps=mega bits per second (Gigabit/sec) is the rate unit, so the correct argument should be that the USB2.0 transmission speed is 480 megabits/sec, or 480mbps.
Mb=mega bytes (megabytes, megabytes) is the unit of measure, 1mb/s (Megabytes/sec) =8mbps (megabits/sec).

We call the hard disk capacity of 40GB, 80GB, 100GB, where B refers to the byte is "byte".
1 KB = 1024 bytes =2^10 bytes
1 MB = 1024 KB = 2^20 bytes
1 GB = 1024 MB = 2^30 bytes

For example, the previous so-called 56kb modem conversion over 56kbps divided by 8 is 7kbyte, so the real download files from the Internet on the hard drive is the speed of 7kbyte per second.
In other words, the B in relation to the transmission speed is usually the bit.
A volume-related B is generally referred to as byte.

Finally, say: usb2.0 480mbps=60mb/s transmission rate is only theoretical value, it is also subject to the system environment (CPU, hard disk and memory, etc.), its actual read, write hard disk speed about in the 11~16mb/s. But it is also nearly 10 times times faster than the usb1.1 12mbps (1.5m/s).