The route is restarted and the network speed becomes faster. Why? It's slow to surf the internet for a while! Ask for help ~ ~ ~ ~

First, the network itself

The target website you want to connect to is located on a server with insufficient bandwidth or heavy load. The solution is simple, please change the time or change the target website.

Second, the network cable problem caused the network speed to slow down.

As we know, twisted pair is composed of four pairs of wires tightly twisted together according to strict regulations to reduce the influence of crosstalk and background noise. Meanwhile, in T568A standard and T568B standard, only four wires of twisted pair 1 2 and 3,6 are used, in which 1 2 is used for transmission, 3,6 is used for reception, 1 2 must come from one winding pair, and 3,6 must come from one winding pair. In this way, crosstalk can be avoided to the maximum extent and data transmission can be guaranteed. In practice, I found that the network cable not made according to the correct standards (T586A, T586B) has great hidden dangers. The performance is as follows: in one case, the network speed is very slow when it is first used; In another case, the network speed was normal at first, but after a while, the network speed slowed down. The latter situation is very obvious on desktop computers, but it is normal to check the network speed with laptop computers. After years of practice, I found that the slow network speed caused by the network cable not made according to the correct standard is also related to the quality of the network card. Generally, the network card performance of desktop computers is not as good as that of notebook computers. Therefore, when using the switching method to troubleshoot, using a laptop to detect the normal network speed cannot rule out the problem that the network cable is not made according to the standard. We now require all network cables to be suppressed according to T586A and T586B standards, and notebook computers cannot be used instead of desktop computers for fault detection.

Third, there is a loop in the network, which causes the network speed to slow down.

When the number of nodes involved in the network is small and the structure is not very complicated, this phenomenon rarely occurs. However, in some complex networks, there are often redundant spare lines, which will form a loop if they are inadvertently connected. For example, the network cable is connected from the network center to the computer room 1, and then from the computer room 1 to the computer room 2. At the same time, there is a backup line directly connected to the computer room from the network center. If these lines are connected at the same time, it will form a loop, constantly sending and checking packets, thus affecting the overall network speed. This situation is hard to find. In order to avoid this situation, we are required to develop good habits when laying network cables: the network cables should be clearly marked, and records should be made where there are spare cables. When this kind of fault is suspected, the method of partition step by step is generally adopted.

Fourth, the broadcast storm caused by the hardware failure of network equipment leads to the slow network speed.

As the main means of discovering unknown devices, broadcasting plays a very important role in the network. However, with the increase of the number of computers in the network, the number of broadcast packets will increase dramatically. When the number of broadcast packets reaches 30%, the transmission efficiency of the network will decrease obviously. When the network card or network equipment is damaged, broadcast packets will be sent continuously, which will lead to a broadcast storm and paralyze network communication. Therefore, when the hardware of the network equipment fails, the network speed will also slow down. When this kind of fault is suspected, the hub or switch can be replaced by replacement method to eliminate the fault of hub equipment. If these devices are not faulty, after turning off the power of the hub or switch, use the "Ping" command under DOS to test the computers involved one by one, find the computers with faulty network cards, and replace them with new network cards to restore the normal network speed. Network cards, hubs and switches are the most prone to failure and slow down the network.

Five, a port in the network has formed a bottleneck, resulting in slower network speed.

In fact, router WAN port and LAN port, switch port, hub port and server network card may all become network bottlenecks. When the network speed is slow, we can use network management software to check the data flow of routers, switches and server ports during the peak period of network use; You can also use the Netstat command to count the data traffic of each port. On this basis, the location of network data circulation bottleneck is determined, and its bandwidth is managed to increase. There are many specific methods, such as changing the server network card to 100M or 1000M, installing multiple network cards, dividing multiple VLAN, changing the router configuration to increase bandwidth and so on. , which can effectively alleviate the network bottleneck and maximize the data transmission speed.

Sixth, the influence of the worm virus causes the network speed to slow down.

Worms spread by mail have a more and more serious impact on the network speed, which is extremely harmful. This virus causes infected users to keep sending emails as soon as they get online. The virus randomly selects documents from the user's personal computer and attaches them to random addresses in the user's computer address book to send emails. Hundreds of such junk mails were sent out in line, and some of them were returned in batches and piled up on the server. As a result, individual backbone Internet appears obvious congestion, and the network speed obviously slows down, which makes the local area network almost paralyzed. So be sure to upgrade antivirus software in time; Computers should also upgrade and install system patches in time, uninstall unnecessary services, and close unnecessary ports to improve the security and reliability of the system.

Seven, excessive use of firewalls

Excessive use of firewalls will also slow down the network speed. Needless to say, uninstall unnecessary firewalls and keep only one powerful enough.

Eight. Insufficient system resources

You may have too many applications loaded to run in the background. Please load the software reasonably or delete useless programs and files to release resources, so as to improve the network speed.

For NT XP

1. Call regedit to HKEY _ local _ machine \ system \ current control set \ service \ tcpip \ parameter.

Add DWORD

The numerical value named GlobalMaxTcpWindowSize was changed to 360000, and a decimal number was selected.

Add DWORD

The value named TcpWindowSize was changed to 360000 and a decimal number was selected.

Add DWORD

The value named Tcp 1323Opts is changed to 1 to select decimal.

Add DWORD

The value named DefaultTTL has been changed to a 64-bit decimal number.

Add DWORD

The value named EnablePMTUDiscovery is changed to 1 to select decimal.

Add DWORD

The value named EnablePMTUBHDetect is changed to 0 to select decimal.

Add DWORD

The value named SackOpts is changed to 1 to select decimal.

Add DWORD

The value named TcpMaxDupAcks is changed to two decimal places.

Arrive late

HKEY _ LOCAL _ MACHINE \ SYSTEM \ current control set \ Services \ Tcpip \ Parameters \ Interfaces \

Interface (this interface needs to add its own interface, and the new key is called interface)

Add DWORD

The value named MTU is changed to 8000 (if 10M is used).

1500 (if 1.5M is used)

2000 (if 3M is used) Select decimal.

Arrive late

HKEY _ User \ Default \ Software \ Microsoft \ Windows \ Current Version \ internet Settings

Add DWORD

The value named MaxConnectionsPerServer is changed to 00000 100 to select decimal.

Add DWORD

The value named "Maximum number of connections per 1 _ 0 server" was changed to 0000 100 to select decimal.

Arrive late

Win XP broadband speeds up 50 times.

Win XP's network transmission settings do not give full play to the limit of broadband internet access performance.

Before and after the modification, go to the test area below to test the speed, write down the data, and you will know how fast your broadband speed is.

Local test area

Field test area

1 ... Start → Execute (enter REGEDIT and press OK)

2. The login editor window appears, and click the left pane:

HKEY _ LOCAL _ MACHINE \ SYSTEM \ current control set \ Services \ Tcpip

3. Click Tcpip in the left pane, and then press the right mouse button to select Add DWORD.

4. Set the name of DWORD to DefaultTTL and select Modify:

Set to hexadecimal and the value is set to 80.

5. Click Tcpip in the left pane, press the right mouse button, and select Add DWORD.

6. Set the name of DWORD to GlobalMaxTcpWindowSize, and then select Modify: set it to hexadecimal and set the value to 7FFF.

Start over when you're done? Mobile computer, test your computer in the test area ~

I know how to improve my English on ge? A few words ~ ~)

My friend didn't change the pretest, but it was 4327.8 kbps and 522.7 kbytes/sec.

The modified test is10853.7kbps1269.9kbytes/sec.

Windows XP Professional Edition reserves 20% bandwidth by default, which is actually of little use to our individual users. It is better to make full use of it than to idle about. The method is as follows: Enter gpedit.msc in "Start → Run" to open the Group Policy Editor. Find "Computer Configuration → Management Template → Network →QoS Packet Scheduler", select "Restrict Reserved Bandwidth" on the right, select "Properties" to open the dialog box of Restrict Reserved Bandwidth, and select "Disable". After this reset, 20% of the reserved bandwidth can be released.

There are too many protocols bound to 1. network card, which is very common among LAN users. If the network card is bound with many protocols, when the data passes through the network card, the computer will spend a lot of time to decide which protocol to use to transmit the data, and then the user will feel very slow. The solution is to connect ADSL with a network card that only binds PPPoE protocol.

Provide an external interface to the Internet, use another network card to bind other protocols of the local area network, do your own job and improve performance, so that the client's internet access speed will be improved.

2.ADSL equipment has poor heat dissipation. ADSL equipment generates a lot of heat when working, so attention should be paid to heat dissipation at ordinary times. Many users put ADSL equipment, routers and hubs in a cabinet, which is not conducive to heat dissipation and has an impact on the normal work of ADSL. ADSL and other equipment should not be put in the cupboard, but should be placed separately. There are ventilation and heat dissipation channels between devices. It is best to maintain a constant temperature indoors, and the general ambient temperature should be controlled at 10 ~ 30℃.

3. Error in accessing Internet interface This is caused by an error in accessing the Internet interface specified for IE by the Internet Connection Wizard of Windows system. EnterNet 300 (virtual dialing software) uses LAN type virtual dialing, and IE uses ordinary dialing by default. When browsing, IE first looks for the dial-up interface. If it can't find a dial-up, it will look for whether there is a proxy server in the LAN, and finally it will find the interface of EnterNet 300, so it will be very slow. Just run the Internet Connection Wizard again, select LAN mode, and cancel the automatic search for proxy servers.

4. Unable to bind TCP/IP protocol. Unable to bind TCP/IP. Most of them are incorrect installation of network card drivers, quality problems of network cards and poor PCI slots. The network card driver in the device manager should be deleted first, and then installed after restarting; If it is not good, replace the network card with PCI slot; It is still difficult to change the network card.

The quality of telephone line is very poor. ADSL technology requires high quality telephone lines. At present, ADSL is a kind of RADSL (Rate Adaptive DSL). If the telephone line between the telecommunication bureau and users is disturbed by external factors within a certain period of time, RADSL will dynamically adjust the access speed of users according to the line quality and transmission distance. If you visit a foreign site, the speed will be affected by the export bandwidth, the line and equipment configuration of the other site, and it needs the cooperation of the whole network. The main problems existing in the line are the quality hidden dangers left by the failure to follow the construction standards, such as rats biting off the line without adding plastic sleeves; Poor jumper contact due to quality problems of distribution frame or other materials; When decorating, the indoor lines hidden by users are damaged.

6. The software has not been reset. After the user installed ADSL, the internet access conditions changed, and the corresponding tool software was not reset, which is also one of the reasons for the slow speed. For example, the communication software QQ, you need to make some settings for it. Select the "System Parameters" command in the QQ panel and click the "Network Settings" tab to change the original "Dial-up Internet Access" to "LAN Access to the Internet".

7. Microcomputer hardware and software problems Hardware failures are mainly manifested as bad network cards or incorrect installation; Microcomputer motherboard and network card are incompatible; Low computer configuration, especially low memory, leads to slow running speed. Software failure is mainly due to the user's ignorance of computer knowledge and misoperation in the use process, resulting in errors in the operating system or damage to dialing software, which makes it impossible to access the Internet. After the user browsed some web pages, there was a problem in the system, and the backup dialing software was accidentally deleted during the processing; After the microcomputer reinstalled the system, no dialing software was installed, and so on. These software failures can be eliminated by reinstalling dial-up software.

8. A website can't be opened for a long time. The reason is that during peak hours, many users visit the same popular website because the website server can't handle it or the bandwidth is narrow.

There will be a situation where the network speed is slow and the webpage cannot be opened for a long time. Please avoid surfing the Internet or visiting other websites during peak hours.

9. Due to the failure of Internet nodes, the network system automatically detours, resulting in slower network speed. Please wait patiently for the system to recover.

10. Due to the quality problem of "cat", the Internet access speed is slow. Please change the quality of "cat"

1 1. The electric index of the telephone line is too low, which leads to slow Internet access. Please change the quality line.

12. The connection speed between the external "cat" and the host computer is slow, which leads to the slow internet access. Please reset the interface parameters.

13. Running an advanced operating system on a low-end computer will lead to slow Internet access. Please re-select the operating system and browser suitable for your computer.

14. Internet access is slow due to improper browser settings. Please reset the number of days to save web pages, set the browser's cache directory on the hard disk with the highest transmission rate, and increase the capacity appropriately.

At present, most dial-up users' computers use Windows system. We often hear users complain about the slow speed of surfing the Internet, but we find that when they feel slow, they are actually disconnected from the Internet, but at this time, the icon of surfing the Internet still exists, causing the illusion that they are still surfing the Internet. If you have a mobile phone with you, you can pick it up and identify it. You can also drag the mouse to the icon online, right-click and select "Status" to see if you have received the data. If you haven't received data for a period of time, you can assume that the line has been disconnected and you can only redial.