DNS stands for Domain Name Server, and is a program that saves a table of domain name and the corresponding IP address to analyze the domain name of the message. Domain name is the name of a computer or a computer group on the Internet, used to identify the electron position of computer in data Read more »
Tag Archives: computer science
What is Domain Name Analysis?
Domain Name analysis is the conversion process of the domain name to IP address. IP address is the number address which identifies your site in the network. To make it simple and easy to remember, we use domain name to replace IP address to identify the site address. Domain name analysis is completed by the Read more »
What is External Processor?
External processor refers to the processor which specializes in the import, export and other operations in multi-processor system. The external processor has the ability to host parallel processing of data. It can output data to the system host and input data from the system host, and then process and control, thereby enhancing the computing power Read more »
What is External Memory?
There are many different types of memory, and can be divided into the main memory and external memory (secondary memory) according to the usage. Main memory is also known as internal memory. Auxiliary memory is also known as external memory. External memory usually includes magnetic media or CD-ROM, such as hard disks, floppy disks, tapes, Read more »
What is External Device?
It is the general reference of input and output devices and the external memory in the computer system. It plays a role of data and information transmission, transfer and storage. It is an important part of the computer system. It usually includes monitor, mouse, keyboard, modem, scanner and printer.
What is Media Access Control(MAC)?
Media Access Control(MAC) is the bottom-level component of data link layer, is used in Carrier Sense Multiple Access with Collision Detection (CSMA / CD) in the local area network (LAN) and to share access to transmission medium in Ring LAN.
What are Learning Curves?
Learning curve sometimes are called practice curves. In order to know the phenomenon of the learning process and progress of the study to list them as later guide to efforts, people apply statistical methods to make a line graph and show it out.
What is Serial Number?
“Serial number”, sometimes referred to “machine code”, is that some software takes some protective measures to prevent piracy. When the user registers, a unique identification code will be generated according to the user’s computer hardware and software information on which the software is installed, commonly known as machine code, also known as serial number, authentication Read more »
What is Delay Line?
Components or devices which are used to delay signal for some time are known as delay line. Delay line should be flat within the passband amplitude frequency characteristics and a certain phase shift (or delay frequency characteristics), and have the appropriate matching impedance, while the attenuation should be small. For analog signals, the delay line Read more »
What is Address Mapping?
To ensure that the CPU can access correct memory units during the implementation of instructions, the logic addresses of the user program need to be interpreted into to the physical addresses the machine directly find when running, and this process is known as address mapping.
What is Cyclic Redundancy Check?
In digital data communications, when the digital signal frame sent by the transmitter is received by the receiver via the network, due to a variety of factors there may be bit errors, therefore the receiver must take some measures to detect all the error bits, and then take certain measures to amend the errors. Cyclic Read more »
What is Quick Sort algorithm?
Quick Sort algorithm is an effective sorting algorithm. Although according to the algorithm, in the worst case running time is O (n ^ 2), but since the average running time is O (nlogn), and due to the good performance in memory usage, the complexity of the program achieving, especially the possibility of randomizing the quick Read more »
What is Control Unit?
Control Unit is the CPU’s command and control center, consisting of three components , the Instruction Register, Program Counter and Operation Controller, and is of vital importance in coordinating the orderly operation of the computer. There are two different kinds of Control Units with different structures determined by different design methods, namely the combinational logic Read more »
What is Control Frame & Control Screen?
Control frame is also called S frame, used for error control and flow control. In order to allow users to understand the various statuses of the working card printer and make it convenient for users to control it, LCD control screen is installed in the panel of the card printer to display various information for Read more »
What is ControlBus?
Control bus is mainly used to transmit the control signals and timing signals. Among the control signals, some are sent by microprocessor to memory and the interface circuit of input and output devices, such as read / write signals, chip selecting signals, interrupt response signals; there are also from other components to the CPU, such Read more »
What is Control Panel?
The main station may be called the control panel, whose role is to control the whole bus, configure and diagnose. It has a IO data stack which preserves all the IO data. When the bus is running, the main station sends output signal to the scene peripheral equipment, simultaneously receive the input signal of the Read more »
What is Control Box?
Control device is often referred to as control box, and its role is: (1) reliably access and cut off the primary power source of welding transformer. (2) control the flash welding machine to automatically work according to the scheduled welding cycle.
What is Control System?
Control system means the management system consisting of that the control subjects and control objects and control media with its own objectives and functions.