What's the reason for slow speed?

Source: Internet
Author: User
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Usually when we surf the Internet, we will encounter slow speed, but the cause of slow speed is many, need careful examination to determine the cause and solution, the more familiar to the computer more easily learn to solve the problem, if the computer has some problems to be solved, it is very boring. such as the computer network slow such problems will often be encountered, then we will explain the details of the slow speed of the solution.

One, network cable problems caused by slow speed

There are many kinds of network cable, its quality is also good and bad, poor quality or aging network cable will lead to slow computer speed. Twisted-pair wires are tightly twisted and together by four pairs of lines to reduce crosstalk and background noise. At the same time, only 1, 2 and 3, 64 lines of twisted pair are used in the T568A standard and the T568B standard, where 1, 2 are used for sending, 3, 6 is used for reception, and 1, 2 must come from a winding pair, 3, 6 must come from a revolve pair. Only in this way can the maximum avoid crosstalk and ensure data transmission. In practice, I found that not according to the correct standard (T586A, t586b) The production of network cable, there are a lot of hidden dangers.

The performance is: one kind of situation is when starts to use the network speed is very slow, the other kind of situation is starts the net speed to be normal, but after some time, the net speed slows down. The latter situation is evident on desktop computers, but the speed at which the computer is checked with a laptop is normal. For this problem I have been found for many years, due to not according to the correct standard made by the network cable caused by slow speed and the quality of the network card.

General desktop computer network card performance is not as good as notebook computer, therefore, in the use of Jiao to troubleshoot, using a notebook computer to detect the normal speed of the network does not rule out the existence of the problem. We are now required to press T586A, T586B standard. Network cable, in the detection of failures can not be used in lieu of desktop computers.

Second, the network's own problems lead to slow speed

The destination Web site you want to connect to is on a server with insufficient bandwidth or too much load. The processing method is very simple, please change the time period to go up again or change a target website. Or is there a problem with your network provider, such as telecommunications and netcom and so on.

Third, network equipment hardware failure to slow down the speed

Network device hardware failure can also cause slow speed. When you suspect such a failure, you can first replace the hub or jiao with a replacement to troubleshoot the hub device. If these devices do not malfunction, turn off the hub or jiao power, DOS under the "Ping" command to the computer involved in one test, to find a faulty network card computer, replace the new network card can restore normal speed. Network adapters, hubs, and switches are the most likely devices to cause slow internet speed.

Four, the network exists the loop to cause the net speed to become slow

This phenomenon rarely occurs when the number of nodes involved in the network is not many and the structure is not very complex. However, in some more complex networks, there are often redundant lines, such as inadvertently connected to form a circuit. For example, cable from the network Center to a computer room, and then from the computer room to the second room computer. At the same time from the network Center and a standby line directly connected to the computer room two, if the several lines connected at the same time, the formation of the circuit, the packet will continue to send and verify data, thus affecting the overall speed. This is a difficult situation to find. In order to avoid this situation, we must be in the laying of the network of good habits: network cable marked on the label, there is a standby line of the place to do a record. When such a failure occurs, it is generally used in a step-by-step approach to partition segmentation.

V. Poor quality of telephone lines slows down the internet

ADSL technology for the quality of the telephone line, the current use of ADSL is a RADSL (that is, the rate of adaptive ADSL), if the telephone line to the user in a certain period of time by external factors interference, RADSL will be based on the quality of the line and the distance between transmission distances, Dynamically adjusts the user's access speed. If the visit is a foreign site, the speed will be export bandwidth and the other side of the site line, equipment configuration and other factors, the need to coordinate the whole network to solve. The main line problems are: Because the construction did not follow the construction standards, leaving behind the quality of the hidden trouble, such as no plastic casing caused by the mouse bite off the line, wiring racks or other materials due to quality problems, resulting in the jumper contact bad, the user in the decoration of the indoor line damaged.

Six, worms and other viruses caused by the impact of slow speed

The worm virus which is distributed through e-mail is more and more serious and harmful to the network speed. The virus causes infected users to keep sending emails as soon as they surf the internet, and the virus chooses random documents in the user's personal computer to attach to the random address of the user's address book to send mail. Hundreds of such spam messages are queued to be sent out, and some are returned to heap on the server in batches.

Cause individual backbone of the internet appears obvious congestion, network speed significantly slowed down, so that the LAN nearly paralyzed. Therefore, we must upgrade the anti-virus software in time, the computer also need to upgrade in time, install the system patch, while unloading unnecessary services, shut down unnecessary ports, in order to improve the security and reliability of the system. Of course, in addition to worms, there are many new network viruses can lead to slow speed, such as ARP and other viruses are very powerful.

Through the above introduction, slow speed of the solution has come out, and the reason for the slow speed of the computer network is basically above these, or some problems can lead to slow speed, we here can not one by one of the introduction, if you have any questions to contact us, we will help you solve the problem.

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