Introduction Frame Check SequenceThe judgment process is as follows: the sending network card uses a polynomial calculation, called cyclic redundancy check (CRC), and writes the calculation result I...

A physical recording block on the hard disk needs three parameters to locate: cylinder number, sector number, head number. Hard disk capacity = number of cylinders × number of heads × number of sector...

The same algorithm for the ring redundancy code is checked.If there is an error, it needs to be retransmitted. 2. Examples of cyclic redundancy code generation and code word correctness verification....

V.90 is a 56Kbps data transmission standard formulated by the ITU (International Telecommunication Union). Through the use of compression schemes such as V.42bis, the modem can operate at a rate of 56...

Concept Synchronous control is in contrast to asynchronous control. The content of a synchronously controlled led display is the same as that of the display that controls the computer when publishin...

Development Overview With the popularity of computers in the home, more and more file exchanges have also occurred. How do you "move" the data in your computer at this time? It's very simple, just bu...

Non-electric signals (such as sound, light, etc.) are input to the converter (such as microphones, photoelectric tubes) to output continuous electrical signals, so that the frequency or amplitude of t...

Definition The transmission unit is a data block composed of multiple bytes or multiple bits. It is synchronized only at the beginning of the frame, and a fixed clock is maintained within the frame....

Collision detection classification Carrier Sense Multiple Access/Collision Detection (CSMA/CD)This solution requires the device to perform the channel detection while sending the frame. Listen to d...

Introduction XMODEM is a low-speed file transfer protocol. KERMIT is a file transfer protocol used in an asynchronous communication environment. The main difference between it and XMODEM is: KERMIT...

Introduction As an important part of professional articles in sci-tech journals, graphics play an important role in the professionalism and academic nature of articles. Without good graphics and gra...

Introduction to memory It cancels the time interval between the two storage cycles of the motherboard and the memory, and transmits data every 2 clock pulse cycles, which greatly shortens the access...

Introduction to working voltage The real-time working voltage of electrical equipment usually needs to be measured with the help of a multimeter, which is an unknown value. The calculation relations...

The synonym North Bridge chip generally refers to the North Bridge (computer motherboard north bridge chip). Features The data processing capacity of the north bridge chip is very large, and the hea...

Basic information Since Intel Corporation in the United States designed and manufactured 4-bit microprocessor chips in 1971, in more than 20 years, CPUs have evolved from Intel4004, 80286, 80386, 8...