Why is the network connection error

Problem 1: Why is the network connection error Lead to this state, because your computer (or auxiliary equipment) at the beginning of the sub-healthy state, the emergence of this state is inevitable; the original you do not have this pathology is a fortunate accident; this phenomenon produces a lot of reasons (the user's configuration is of course very important), the problem you want "comprehensive Thoroughly" find, here especially emphasize the "comprehensive, thorough" the four words; any aspect of the causes are the root cause of this phenomenon, the problem is that you are passive results, to take the initiative to reduce the problem as early as possible; I am here like a Chinese medicine: the implementation of both symptoms and root causes of your treatment; you may wish to According to the following aspects to carefully and completely, thoroughly check; so that = dredge (smooth your tendons and muscles) the road of each device, the road dredged = your problem is not solved (completely out of the state of sub-health). Copyright: This answer for the harmony of the original, no one may not steal! 1: Check the power supply 1.1 Check with a multimeter to see if the power supply is stable?1.2 AC voltage fluctuations within the permissible range?1.3 Ripple coefficient after the A/D conversion of the power supply (with a millivolt meter to check) whether it is qualified?1.4 Is the temperature rise of the power supply abnormal? 1.5 Do the voltage stabilization characteristics meet the technical specifications?1.6 Do the voltage stabilization characteristics and ripple coefficient under rated load meet the technical specifications?1.7 When replacing a large fan, does your power supply capacity meet the requirements?1.8 Generally, the power supply for auxiliary equipment (routers, network switches, cats, etc.) is a rectified power supply without voltage stabilization, with a larger ripple coefficient (probably caused by the drying up of the filter capacitors) and a poorer load capacity is also poor; special attention should be paid.1.9 Due to equipment over-voltage (like feeding a child, more can hold up), under-voltage (like feeding a child, less will be malnourished), voltage fluctuation is too large (like giving a child a meal, hungry, full of an indeterminate amount of food), over-current, heat, resulting in overheating protection action to cut out of the fault and take the equipment out of operation (i.e.: it will produce a slow, delayed, repeated startups, Delay, drop, interrupt, disconnect, automatic shutdown, crash and other manifestations), etc.; 1.10 power supply overcurrent protection and overheating protection is the correct action? Is the action sensitive? Whether the action is refused to move or false action? 2: Check the network cable and crystal head (R45): 2.1 crystal head and the seat is plugged (loose?)? 2.2 contact is good? What is the contact resistance? 2.3 Is there any dust accumulation? Is it oxidized?2.4 Has the mechanical latch of the crystal head and the seat been latched?2.5 Is the latch firm?2.6 Is the network cable and the crystal head pressed and in good contact?2.7 Insulation resistance between the wires of the network cable (using a 100V rocking meter), should be greater than 20 megohms.　Copyright: This answer for the harmony of the original, no one shall steal! 3: grounding: grounding is mainly to protect the safety of people and equipment! Multi-point grounding, repeated grounding, grounding is the principle of proximity; grounding is divided into protective grounding, shielding grounding, work grounding, etc.; I use a murmur meter to test the murmur voltage is greater than the signal more than 6,000 times, you do not ground such a high murmur of your equipment can work? Grounding is the most basic requirements to do IT, analog equipment is such, digital circuits is more so, from all aspects of the interference can be reduced or eliminated by grounding, foreign interference and local, local inter-circuit wiring coupling can be reduced and eliminated, do a good job of grounding and shielding of the equipment, a lot of interference from the shielding is not good, grounding is bad, a lot of people are only in the software to do the work, a lot of interference are Caused by poor grounding or no grounding, this failure is very easy to produce, but also easy to be ignored by many people, many equipment damage and grounding is directly related to the lack of grounding or poor grounding can lead to inter-code interference, misuse of code, delays, packet loss, intermittent, dropped (disconnected, interrupted), dead, card, automatic shutdown, repeated startups, repeat startups, frequent reboots (or repeated with the connection) and other phenomena. Grounding must have more than two grounding electrodes, each grounding electrode between the minimum interval of 10 meters or more, grounding electrodes to the machine room grounding line shall not have any joints, respectively, with a cross-section of not less than 25 square millimeters of soft copper wire introduced into the machine room sink (intermediate is not allowed to have any joints), grounding line and Faraday network symmetrically connected to facilitate shunt dispersal, and the sink to the point of connection to be coated with silver powder conductive paste, each device to the Sink (independent) of the grounding wire cross-section shall not be less than 4 square meters of multi-stranded soft copper wire, sink for each grounding electrode grounding resistance of less than 5 ohms (the smaller the better). Minimum annual use of grounding meter (2.5 level or higher grounding meter measurement, and the meter ...... >>

Question 2: The network is normal, why is there still a network connection failure? You may have been hit by a Trojan horse that actively goes to connect to the remote computer when you open the folder.

Download an EWIDO, install it, reboot, press F8, go into safe mode, kill the Trojan, then reboot, and you should be fine.

Did you use EWIDO? I don't think it's a good idea to just get an antivirus scanner and leave it at that.

There's also the fact that your EWIDO must be upgraded before killing.

Start - Run window, type "regsvr32 actxprxy.dll" enter, then there will be a message dialog box "DllRegisterServer in actxprxy.dll succeeded", OK. Then run the following commands regsvr32 shdocvw.dll

regsvr32 oleaut32.dll

regsvr32 actxprxy.dll

regsvr32 mshtml.dll

regsvr32 msjava. dll

regsvr32 browseui.dll

regsvr32 urlmon.dll

Reboot.

These commands are not bad, you can try

Question 3: What is the reason for the network connection error when you open the web page You can use the vulnerability repair function of the antivirus software to repair the IE, or upgrade your computer (set the automatic update option, not only can you repair, but also upgrade your IE browser, which is really much better than before, and some other functions can be upgrade, but it will take some time, you can get someone experienced to help you, make your computer better).

1. Click on the "Start" menu and open "Run".

2. Enter regsvr32 jscript.dll and select "OK".

When prompted, click OK.

3, again enter regsvr32 vbscript.dll select "OK".

Once again, when prompted, click OK.

4, after the above two successful prompts, that has been successfully repaired IE components, the browser filtering and other features off, clear the browser cache (Tools - & gt; Internet Options - & gt; Delete Cookies), point the browser on the Tools - and then select the most The following Internet Options, and then point Internet to delete files (remember to check the delete all offline content), OK, and then re-open the browser to try!

Problem four: how the computer always appears network connection error network connection TCP / IP properties to automatically assign IP, or right-click on the network connection - repair

are not on the performance of the new installation of network drivers

Problem five: the computer is often network error is the reason? The use of ADSL Internet access will often encounter web pages can not be opened, download interruptions, or online video, audio streaming interruptions, qq drop line, game drop line and other phenomena. We may as well assume that the owner is using ADSL to access the Internet. In fact, other ways of accessing the Internet often drop out of the reason and the following reasons are roughly the same. Here we analyze the reasons for ADSL dropouts.

First, the line problem

First of all, check the home line, see whether the house connector is well connected, the line is not through any source of interference, such as air conditioning, refrigerators, TV, etc., try to maintain a certain distance from these power equipment. You can also replace the indoor line with a network cable that is more resistant to interference. Make sure the lines are connected correctly. After the telephone line into the house to connect the junction box, and then to the voice separator separation, a line to go to the phone, a line to go to the MODEM (separator is labeled). At the same time to ensure that the line communication quality is good without *** interference, not connected to other equipment that will cause line interference. And check the junction box and crystal head there is no poor contact and whether with other wires strung together. It is better to use a standard telephone line if possible, and connect the PC to the twisted-pair cable that comes with the ADSL Modem. The wiring is one of the most important factors in the quality of Internet access. Distance from the user cable line within 100 meters of the radio transmission towers, welding machines, trams or high-voltage power transformers and other sources of signal interference, can make the user down the line to receive stray waves (copper-coated steel wire shielding is weak, strong ability to receive signals), the user line caused by strong interference. Interfered with the signal is often unshielded down the line part of the entry, because the relay cable has a shield, the interference and the impact is very small. If you use some lower wires with shielding in places with high interference, it will reduce the unstable speed or drop phenomenon caused by interference. In addition, the power line must not be parallel with the adsl line to prevent crosstalk and cause adsl failure. In addition, there are many other factors that cause network instability, such as signal interference and software conflicts. The cell phone is a kind of radiation thing must not be placed next to the ADSL Modem, because every few minutes the cell phone will automatically find the network, this time the powerful electromagnetic wave interference is enough to cause ADSL Modem cutoff.

Second, the network card problem

The network card is usually a PCI card or on-board network card, when you choose to choose the quality of the better, otherwise it may cause the Internet quality is not good. 10M or 10M/100M adaptive network card can. In addition, many machines *** enjoy Internet access, the use of dual-network card, which is also caused by the same conflict of concern, this time, should be pulled up to connect the LAN or other computer network card, only connected to the ADSL network card Internet test, if the failure to return to normal, and then check the two network cards have no conflict.

Third, the ADSL MODEM or network card settings

Now MODEM generally has two working modes, one is the normal mode using dial-up software, and the other is the automatic dialing routing mode. In normal mode, there is no need to set up the MODEM, just use the default. Routing mode, on the other hand, requires settings. The MODEM comes with its own flash memory, so you can deposit account and password box settings for power-on auto dialing. This method is most commonly used when the IP address of the ADSL Modem is set wrongly, or the DNS server is set wrongly. Because for ADSL virtual dialing users, there is no need to set IP address, it can be assigned automatically, and TCP/IP gateway generally does not need to be set. However, DNS settings must be set correctly, DNS address can be obtained from the local telecommunications department. In addition, the TCP/IP settings are most likely to cause the situation of not being able to browse the web, generally set to automatically obtain an IP address, but the DNS must be filled in.

Fourth, ADSL Modem synchronization abnormalities

Check your phone line and ADSL connection place whether the contact is poor, or the phone line problem, the quality of the phone is particularly easy to cause the drop line, but such a problem is not good to check, so be sure to use a better quality of the phone line. If you suspect that the splitter is bad or the ADSL Modem is bad, try to connect the external line directly to the ADSL Modem without using the splitter. the connection line between the splitter and the ADSL Modem shouldn't be too long, or else it can't be synchronized. To rule out the above, just restart the ADSL Modem to solve the synchronization problem.

Fifth, the operating system, virus problems

In addition to the above mentioned line conditions, there are computer system problems. The first thing you need to do is to get your hands dirty. The problem occurred in the country are large areas, the virus on the host agent and router ...... >>

Question 6: Why does Alipay always have a network connection error Reason:

It can be caused by a bad network signal, a network connection error, and another system upgrade can also occur, a network connection error.

Solution:

Check whether the network is normal, avoid system upgrade.

Problem 7: The phone always appears network connection error please try again later how many friends in the Internet will encounter this problem, usually caused by the following reasons:

1, the phone opened the flight mode or Do Not Disturb mode, which will lead to network interruptions.

2, the nearby signal or wifi interruption, but the phone still shows that there is a signal and wifi, which will also lead to network interruption.

3, in the process of using the phone, due to the sudden arrears, the operator stopped your network, you can not normal Internet, resulting in network interruption

4, the router has been used for too long, resulting in router abnormalities, and then there will be a sudden interruption of the network and then after a period of time to link the good situation, the problem just need to replace the router on the line.

5, check whether the interface is loose, including the router and the network cable connection.

6, too many people use your wifi network, resulting in congestion, the network speed will slow down or even disconnect, so there will be a network connection error please try again later.

7, if you use a computer, computer ip conflict or restriction, that is, your computer ip and router ip is not the same time, will prompt you ip conflict or hand limitations, your network will be interrupted, the ip to adjust to the same line.

I hope it works for you!

Question 8: Why is there no problem with the network connection, but the network can not go up? The possible reasons for not being able to open the network industry are:

First, the problem of network settings

This reason is more often found in the need to manually specify the IP, gateway, DNS server networking mode, and the use of proxy servers to access the Internet. The first thing you need to do is to check your computer's network settings carefully.

Second, the problem of DNS servers

When IE can not browse the web, you can first try to use the IP address to access, if you can access, then it should be a DNS problem, resulting in DNS problems may be connected to the network to obtain DNS error or DNS server itself, then you can manually specify the DNS service (address can be provided by your local ISP) DNS server address provided by your local ISP, or you can use other places where DNS server address can be used normally.) Do this in the properties of the network, (Control Panel - Network and Unplugged Connections - Local Connections - Right-click Properties - TCP/IP Protocol - Properties - Use the following DNS server address). Different ISPs have different DNS addresses. Sometimes it's a problem with your router or network card that prevents you from connecting to your ISP's DNS service, in which case you can either turn your router off for a while and then back on again, or reset your router.

There is also a possibility that there is a problem with the local DNS cache. In order to increase the speed of website access, the system will automatically store the websites that have already been accessed and obtained IP addresses in the local DNS cache, and once the website is accessed again, it will no longer be accessed through the DNS servers, but directly from the local DNS cache to retrieve the IP address of the website. Therefore, if there is a problem with the local DNS cache, the website will be inaccessible. You can rebuild the local DNS cache by running ipconfig /flushdns in Run.

Third, the IE browser itself

When the IE browser itself fails, it will naturally affect the browsing; or IE has been maliciously modified to destroy will also lead to the inability to browse the web. This time you can try to use the "Huangshan IE repair experts" to repair (recommended to the safe mode repair), or re-IE (such as reinstallation of IE encountered can not be re-problems, you can refer to: attached to a solution to the inability to re-install IE)

Fourth, the problem of network firewalls

If the network firewall is not properly set up, such as too high a security level. If the network firewall is not set up properly, such as too high a security level, accidentally put IE into the block access list, the wrong firewall policy, etc., you can try to check the policy, reduce the firewall security level or directly turn off to try to return to normal.

V. Problems with network protocols and network card drivers

IE can't be browsed, it may be caused by the network protocols (especially the TCP/IP protocol) or the network card driver being damaged, so you can try to re-drive the network card driver and network protocols.

Sixth, the problem of HOSTS files

HOSTS files have been modified, can also lead to abnormal browsing, the solution is, of course, to clear the contents of the HOSTS file.

Seventh, the problem of system files

When the system files related to IE is replaced or damaged, it will affect the normal use of IE, this time you can use the SFC command to repair, WIN98 system can be in the "Run" in the implementation of the SFC, and then perform a scan; WIN2000 / XP / 2003 is in the "Run" in the "Run", and then perform a scan. /2003 in the "Run" in the implementation of sfc /scannow try to repair.

Which when only IE can not browse the web, and QQ can be on, it is often due to winsock.dll, wsock32.dll or wsock.vxd (VXD only exists under the WIN9X system) and other files are damaged or missing caused by the Winsock is an important part of the composition of the TCP / IP protocols, the general reinstallation of the TCP / IP protocols. IP protocol. However, XP began to integrate TCP/IP protocol, so it can not be as simple as 98 uninstalled and reinstalled, you can use the netsh command to reset the TCP/IP protocol, so that the initial installation of the operating system back to the state. The specific operation is as follows:

Click "Start Run", in the Run dialog box, type "CMD" command, pop-up command prompt window, and then enter "netsh int ip reset c:\resetlog.txt" command will return to the car can be, which "resetlog.txt" file is used to record the results of the command execution log file, the parameter option must be specified, the complete path of the log file specified here is The full path of the log file specified here is "c:\resetlog.txt". The result after executing this command is the same as removing and reinstalling the TCP/IP protocol. ...... >>

Question 9: It keeps saying network error. Have to reconnect, what's going on 10 points What's the error code?

Find the problem from the error code that appears in ADSL dial-up:

Error 602 The port is already open

Problem: The dial-up network network cannot connect due to incorrect installation of the device or it is in use

Reason: RasPPPoE is not fully and correctly installed

Solution: Uninstall any PPPoE software and reinstall

Error 605 Cannot set port information

Problem: The dial-up network cannot set the port to be used due to an incorrect installation of the device

Reason: RasPPPoE has not been installed completely and correctly

This problem is caused by the fact that RasPPPoE is not fully and correctly installed. > Solution: Uninstall any PPPoE software and reinstall it

Error 606 The port is not connected

Problem: The dial-up network network cannot connect to the required device port

Reason: RasPPPoE is not fully and correctly installed, faulty cable, ADSL MODEM failure. Failure

Solution: Uninstall any PPPoE software, reinstall it, check the cable and ADSL MODEM

Error 608 The device does not exist

Problem: The device that the dial-up network network connects to does not exist

Reason: The RasPPPoE is not installed completely and correctly.

Solution: Uninstall any PPPoE software and reinstall it

Error 609 The device type does not exist

Problem: The type of device connected to the dial-up network cannot be determined

Reason: RasPPPoE is not fully and correctly installed

Solution: Uninstall any PPPoE software and reinstall it

Error 611 The route is not available/612 The route is not allocated

Problem: The dial-up network network connection is not routed correctly

Cause: RasPPPoE Not fully and correctly installed, ISP server failure

Solution: Uninstall any PPPoE software, reinstall, call ISP and ask

Error 617 The port or device is already disconnecting

Problem: The port or device is already Disconnecting

Cause: RasPPPoE is not fully and correctly installed, ISP server is faulty, connecting cable, ADSL MODEM is faulty

Solution: Uninstall any PPPoE software cleanly, reinstall it, call the ISP to ask for it, check the cable and ADSL MODEM

Error 619

Problem Problem: Connection to the ISP server cannot be established

Cause: Faulty ADSL ISP server, faulty ADSL phone line

Solution: Check if the ADSL signals are synchronized correctly. Call the ISP and ask

Error 621 Cannot open the phone book file

Error 622 Cannot load the phone book file

Error 623 Cannot find the phone book entry

Error 623 Cannot find the phone book entry

Error 624 Cannot write the phone book file

Error 625 Invalid information found in the phone book

Problem: The network RAS network component of Windows NT or Windows 2000 Server is failing. 2000 Server network RAS network component failure

Cause: software installation problem

Solution: uninstall all PPPoE software and reinstall RAS network component and RasPPPoE

Error 630

Problem: ADSL MODEM is not not responding

Cause: ADSL phone line failure, ADSL MODEM failure (power not turned on, etc.)

Solution: Check the ADSL device

Error 633

Problem: Dial-up network network due to wrong device installation ...... >>

Problem 10: What's wrong with my computer that keeps failing to connect to the network? You need to confirm that you are now using the network cable is normal, (the best is to put your computer to someone else has a network to see if you can not normally connect to the network, so that you can easily check whether it is a problem on your machine.)

If the line problem is confirmed, it is not normal to replace the crystal head, or the entire line is replaced

Furthermore, if it is not a line problem, then you first update your driver to see if you can achieve the purpose, if not, then you add a network card.