Common Problem
What are the transmission technologies commonly used in remote communications in computer network systems?
What are the transmission technologies commonly used in remote communications in computer network systems?
The transmission technology commonly used in remote communication in computer network systems is "frequency band transmission". There are three basic methods of data transmission: baseband transmission, frequency band transmission, and digital data transmission; among them, frequency band transmission is suitable for long-distance transmission. Frequency band transmission is a transmission method that uses a modulator to perform frequency exchange of transmission signals. Long-distance communication in computer networks often relies on telephone systems, and frequency band transmission is usually used; the conversion of baseband signals and frequency band signals is performed by modulation and demodulation. Technically done.
The operating environment of this tutorial: Windows 7 system, Dell G3 computer.
The transmission technology commonly used in remote communication in computer network systems is "frequency band transmission".
There are three basic methods of data transmission: baseband transmission, frequency band transmission, and digital data transmission. Among them, frequency band transmission is suitable for long-distance transmission, and baseband transmission is suitable for data transmission on a parallel bus in a computer.
Frequency band transmission
Frequency band transmission is a transmission method in which the signal is modulated and transmitted to the terminal and then demodulated again. That is, the digital signal (binary electrical signal) is modulated and converted into an analog signal (audio signal) that can be transmitted on a public telephone line. After being transmitted to the receiving end through the transmission medium, the modem then demodulates and converts the audio signal into the original Binary electrical signal. Frequency band transmission requires separate modems at the sending end and receiving end. This transmission method overcomes the shortcomings of many long-distance telephone lines that cannot directly transmit baseband signals, and can realize multiplexing functions.
Frequency band transmission is a transmission method that uses a modulator to frequency exchange the transmission signal. The purpose of signal modulation is to better adapt to the frequency characteristics of the signal transmission channel. The transmission signal can also overcome the baseband after modulation processing. It eliminates the shortcomings of too wide transmission bandwidth and improves line utilization, killing two birds with one stone. However, the modulated signal needs to be demodulated and restored at the receiving end, so the transmitting and receiving end of the transmission requires special signal frequency conversion equipment, and the cost of transmission equipment increases accordingly. Most long-distance communication channels are analog channels. For example, traditional telephones (telephone channels) are only suitable for transmitting analog signals in the audio range (300-3400Hz), and are not suitable for direct transmission of digital signals with a wide frequency band but energy concentrated in low frequency bands. baseband signal.
Frequency band transmission is to first convert (modulate) the baseband signal into an analog signal with a higher frequency range (called a frequency band signal) that is convenient for transmission in the analog channel, and then transmit this frequency band signal in the analog channel medium transmission. When using the frequency band transmission method, modems are required to be installed at both the sending and receiving ends. The use of frequency band transmission not only solves the problem that digital signals can be transmitted using the telephone system, but also enables multiplexing to improve the utilization of transmission channels.
Long-distance communication in computer networks often relies on telephone systems, usually using frequency band transmission.
The conversion of baseband signals and frequency band signals is completed by modulation and demodulation technology.
For more related knowledge, please visit the FAQ column!
The above is the detailed content of What are the transmission technologies commonly used in remote communications in computer network systems?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1393
52
1207
24
Remote Desktop cannot authenticate the remote computer's identity
Feb 29, 2024 pm 12:30 PM
Windows Remote Desktop Service allows users to access computers remotely, which is very convenient for people who need to work remotely. However, problems can be encountered when users cannot connect to the remote computer or when Remote Desktop cannot authenticate the computer's identity. This may be caused by network connection issues or certificate verification failure. In this case, the user may need to check the network connection, ensure that the remote computer is online, and try to reconnect. Also, ensuring that the remote computer's authentication options are configured correctly is key to resolving the issue. Such problems with Windows Remote Desktop Services can usually be resolved by carefully checking and adjusting settings. Remote Desktop cannot verify the identity of the remote computer due to a time or date difference. Please make sure your calculations
2024 CSRankings National Computer Science Rankings Released! CMU dominates the list, MIT falls out of the top 5
Mar 25, 2024 pm 06:01 PM
The 2024CSRankings National Computer Science Major Rankings have just been released! This year, in the ranking of the best CS universities in the United States, Carnegie Mellon University (CMU) ranks among the best in the country and in the field of CS, while the University of Illinois at Urbana-Champaign (UIUC) has been ranked second for six consecutive years. Georgia Tech ranked third. Then, Stanford University, University of California at San Diego, University of Michigan, and University of Washington tied for fourth place in the world. It is worth noting that MIT's ranking fell and fell out of the top five. CSRankings is a global university ranking project in the field of computer science initiated by Professor Emery Berger of the School of Computer and Information Sciences at the University of Massachusetts Amherst. The ranking is based on objective
What is e in computer
Aug 31, 2023 am 09:36 AM
The "e" of computer is the scientific notation symbol. The letter "e" is used as the exponent separator in scientific notation, which means "multiplied to the power of 10". In scientific notation, a number is usually written as M × 10^E, where M is a number between 1 and 10 and E represents the exponent.
Fix: Microsoft Teams error code 80090016 Your computer's Trusted Platform module has failed
Apr 19, 2023 pm 09:28 PM
<p>MSTeams is the trusted platform to communicate, chat or call with teammates and colleagues. Error code 80090016 on MSTeams and the message <strong>Your computer's Trusted Platform Module has failed</strong> may cause difficulty logging in. The app will not allow you to log in until the error code is resolved. If you encounter such messages while opening MS Teams or any other Microsoft application, then this article can guide you to resolve the issue. </p><h2&
What does computer cu mean?
Aug 15, 2023 am 09:58 AM
The meaning of cu in a computer depends on the context: 1. Control Unit, in the central processor of a computer, CU is the component responsible for coordinating and controlling the entire computing process; 2. Compute Unit, in a graphics processor or other accelerated processor, CU is the basic unit for processing parallel computing tasks.
Unable to open the Group Policy object on this computer
Feb 07, 2024 pm 02:00 PM
Occasionally, the operating system may malfunction when using a computer. The problem I encountered today was that when accessing gpedit.msc, the system prompted that the Group Policy object could not be opened because the correct permissions may be lacking. The Group Policy object on this computer could not be opened. Solution: 1. When accessing gpedit.msc, the system prompts that the Group Policy object on this computer cannot be opened because of lack of permissions. Details: The system cannot locate the path specified. 2. After the user clicks the close button, the following error window pops up. 3. Check the log records immediately and combine the recorded information to find that the problem lies in the C:\Windows\System32\GroupPolicy\Machine\registry.pol file
What should I do if steam cannot connect to the remote computer?
Mar 01, 2023 pm 02:20 PM
Solution to the problem that steam cannot connect to the remote computer: 1. In the game platform, click the "steam" option in the upper left corner; 2. Open the menu and select the "Settings" option; 3. Select the "Remote Play" option; 4. Check Activate the "Remote Play" function and click the "OK" button.
Python script to log out of computer
Sep 05, 2023 am 08:37 AM
In today's digital age, automation plays a vital role in streamlining and simplifying various tasks. One of these tasks is to log off the computer, which is usually done manually by selecting the logout option from the operating system's user interface. But what if we could automate this process using a Python script? In this blog post, we'll explore how to create a Python script that can log off your computer with just a few lines of code. In this article, we'll walk through the step-by-step process of creating a Python script for logging out of your computer. We'll cover the necessary prerequisites, discuss different ways to log out programmatically, and provide a step-by-step guide to writing the script. Additionally, we will address platform-specific considerations and highlight best practices