Broadband often suddenly does not have speed as a reason

1) If it is a problem with the broadband itself, first directly connect the broadband network cable to test, if it is a broadband problem, contact the broadband customer service to solve it.

2) If it's a problem with the router, if it can be used originally, it can't be used for the time being, my own practice is to disconnect the power of the router and plug it in, and I'll take a look. In there is a factory reset, it can be used from the new settings (this is under the premise of the correct physical connection, sometimes caused by the router's slow or failed IP address search, not that the router is broken).

If it can't be solved all the time, it is recommended to call the customer service of the router, they have **** guidance, I encounter a problem that I can't solve by myself, it is very useful to consult the advice they gave, and they will give the correct advice for your settings or operations.

3) If you turn off the wireless switch, turn it on, if it is a wireless connection with software, it is normal for the software to be difficult to use and often have problems, there is no better way, use a router. In addition, it is caused by the network card driver is not or is not suitable, and whether there is a problem with the network cable interface or network cable.

4) If it is caused by a system problem, it is recommended to restore the system or reinstall it.

There are several common reasons why broadband internet is slow:

1. If the bandwidth of the ** server is narrow or the server is busy, you can try to change the time period to access or access other** to determine whether this problem is caused;

2. Computer reasons such as low computer configuration or weak system processing power;

4. Slow network speed caused by using routers to share the Internet;

5. If the modem device is unstable, it is recommended that you replace the modem device for testing;

6. Line reasons (such as long line, noisy line, poor quality of the entrance line, change of the user-side line, etc.).

If this is not the case, you can contact the local customer service for feedback.

There are many possibilities that can cause network instability, and there are two main types of Internet environments:

Home environment. This kind of network environment is relatively simple, and home broadband is the operator's line into the home, such as the common fiber to the home (there are also network cables to the home).

There are several main possibilities for the instability of this way of surfing the Internet:

First, some people rub the Internet, and now the household will basically use a router to meet the needs of multiple computers, mobile phones, ipads and other devices to access the Internet at the same time.

1. Open a browser, enter the router address and log in to the router.

2. Click Device Management, you can see the user devices connected to the router, and delete the suspicious users directly and add them to the blacklist.

3. Since someone rubs the network, it also means that the password of wifi is not secure enough, and you can set some complex passwords, so that the router will be more secure.

Second, the computer is caused by viruses, this situation needs to use anti-virus software to completely kill the virus, first of all, the cause of the virus caused by the network is abnormal, most of the Trojans will also hijack the DNS to cause the network speed to slow down or not able to access the Internet at all.

3. The router itself is faulty, in this case, you can remove the router and dial directly to the Internet to see if it is unstable.

Fourth, the operator's network problem, if you connect directly to the computer will still appear unstable, then it is mostly caused by the operator's link problem, you can ping the network first, to see if the packet loss is serious.

If this is the case, then you can call the operator** to report to the network.

Corporate LAN environment.

1. Check whether there is an ARP virus in the network (or someone uses some similar tools in the network).

1. Open the PC Manager Toolbox, find the ARP firewall, and double-click.

2. After installation, enter the ARP firewall to set the Harmony Song.

After setting up the connection, every time there is an ARP attack, then the MAC address and IP address of the other party will be prompted, and the infected computer in the LAN can be found through the MAC address, and the normal network can be restored by taking it offline.

Third, there is a loop in the network to guide Zheng Zhi.

In this case, it is difficult to check whether the CPU of each switch is too high.

1. Use the terminal tool (or remotely) to connect to the switch.

2. Enter the global mode of the switch and use show CPU to check the occupancy rate of the CPU.

If the occupancy is low, you can rule out the loop problem, if it is higher than 40, you have to check whether there is a loop phenomenon on the device.

You can use the above methods to rule out network instability and other phenomena.