Anatomical analysis of network instability

Source: Internet
Author: User
Tags t568a firewall

1, the server problem

First of all, network service providers, such as the user's telecommunications, if the network of service operators is not stable, then how to set all is useless. So make sure the server has to be stable first. Of course, the website's server also includes it, some websites its server is abroad its own speed is very slow, all even if our own network speed quickly open this page is very slow.

2, network cable failure

Then it is when we are connected to the Internet network cable, if used to be a telephone line connected to the Internet. Then the relative fiber for that is the cabin to see the big house. So the speed is not stable is very normal. The network cable problem also includes not using the t568a/b wiring standard when wiring. The twisted pair of t568a has 4 lines, including 1 and 2. Used for sending, so you must connect a pair of windings. There are 2 wiring lines 3 and 6. It is the line that receives the information, so it must be connected to a pair of windings. This will ensure the normal transmission of data. If you do not use the standard wiring, there will be the phenomenon of network instability. So the wiring is also very important.

3. Router Setup

Now is the reason for routers and cats. Of course, as long as the line connected to normal, the interface has not been loose contact with bad conditions, and then set the router well, you can troubleshoot the router. It is recommended that the router be restored to its initial state and that the router rest. Reboot the lower router. The DNS and IP addresses are then checked for correct settings.

4, network card failure

Then there is the hardware problem. To see if the problem is a network card, the user's network card is generally a PCI card or on-board network card, the choice of time to choose the quality is better, otherwise it may cause poor quality of the Internet. Then Plug and unplug the NIC socket. Computer next to whether there are other electrical interference in the network situation, these appliances such as air-conditioning, refrigerators, televisions and other appliances to maintain a certain distance. Network adapter also includes driver, all can be in the "right click My Computer-Device Manager-network adapters" to detect if there is an abnormal situation. You can then install it properly. As shown in the figure:

5, network above the existence of the circuit is also a slow speed of one of the reasons. Because on the network in the use of some more complex network, nodes are more, such as in Internet cafes, office space, it is connected to a lot of lines. All this will cause the loop on the unintentional face. All 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.

6, the network of a port to form a bottleneck caused by the slow speed change.

This is where we use routers and switches to connect to the network, and then the router's WAN and LAN ports, switch ports, hub ports, and server network adapters can become network bottlenecks. Of course, when this happens, you can use some software to view the router, switch data flow, and then through the Netstat to view the statistics port data flow, to see the specific location of data bottlenecks, and then to increase the bandwidth to solve the port bottleneck failure.

7, the computer by the worm virus

Now is the computer is the virus, the virus in the words will have a large number of programs running in the background, occupy a lot of speed, all the reasons for the network is not normal to appear here. There are also a number of worms also affect the speed of the network. Worms will keep sending messages to the outside world, causing the server to be busy and the LAN will be paralyzed if authenticated. All computers must be regularly killed virus and some Trojans, so as to keep the network normal situation under the speed will not be disturbed.

8. Insufficient system resources

Too many programs open on the computer, resulting in abnormal system resources. The local solution to the situation is simple. is to turn off some of the processes and the boot process that are not used infrequently. There are unknown processes running in the background at the time of viewing, and they can be ended. Click "Start-Run", enter the "msconfig" command in the Run box to determine, and then disable some boot start program. As shown in the figure:

9, the high level of the firewall

The user has too many firewalls and the firewall level set is too high. Some netizens put 360, windows and Jinshan firewall all opened. This will drag down the Internet. All suggestions open one. Of course, if the level of the firewall to open more higher will affect the speed of the network. All recommendations to close or minimize the firewall level

10, the last is the line and router settings are normal, the computer reinstall system it.

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