Reasons: 1. The broadband is in arrears or expires, and needs to be paid or renewed in time; 2. The network cable is loose, and both ends of the network cable need to be plugged tightly; 3. The equipment is faulty, and the equipment has been used for a long time. Caused by this, just restart Internet access equipment such as optical modems, routers, computers, and mobile phones; 4. The router has enabled scheduled dialing; 5. The router has set up IP address filtering, and the IP address obtained by the mobile phone is in an IP segment that prohibits access to the Internet; 6. Operator account restrictions; 7. Network frequency Hertz problem; 8. Network port power outage; 9. Modem power is turned off, router cannot dial the network, etc.
The operating environment of this tutorial: Windows 7 system, Dell G3 computer.
In today's Internet age, almost every household has broadband. Even if it is not connected to a computer, it must be connected to WiFi for the whole family to surf the Internet. However, one of the most disgusting problems with connecting to broadband WiFi is that it cannot connect to the Internet. , but there is no download speed, that is to say, the Internet cannot be used, so what is the reason why the WiFi is connected but cannot be used? Let’s take a look below.
The reason why the wifi is connected and cannot access the Internet
#1. The broadband is in arrears or expires and needs to be paid or renewed in time.
2. The network cable is loose and you need to tighten both ends of the network cable.
3. Equipment failure
It is caused by long-term use of the equipment. You can turn on and off the optical modem, router, computer, mobile phone and other Internet equipment and restart them.
The current router market is quite mixed. You can even buy a router for twenty or thirty yuan. If the quality of the router is not very good, although the connection can be made after a long period of operation, the connection will be unstable and the data transmission will be bumpy. The most likely situation is that if the mobile phone can connect to WiFi but there is no network available, there is a problem with the end connected to the broadband. You can unplug the network cable and plug it in again, or poke the router with a needle. Press the restart button. If it doesn't work, power off and restart.
#4. The router has enabled scheduled dialing.
The current time is not within the automatic dialing period. Use it after a while.
5. The router has set up IP address filtering
The IP address obtained by the mobile phone is in an IP segment that prohibits access to the Internet. Contact customer service.
6. Operator account restrictions
This situation generally refers to the campus network cmcc. The population base of using the network in schools is relatively large, so the school In order to make money from it, students are usually forced to buy the cmcc that the school cooperates with. This is not only for China Mobile, but also for the platforms of the other two major operators. It is possible to connect to this WiFi anywhere in the school, but it just cannot To use it, you may need to log in with your student ID. If it still doesn’t work after logging in, you have to purchase it from the school’s website or person who is responsible for the network platform. It usually costs how much per semester. If you encounter such a network in society, That's not true, it's impossible. Maybe people only restrict real-name login to their own company or mobile phone number in the supermarket. At this time, if you reconnect to the network, a pop-up window may pop up. After entering, you can get the verification code on your phone.
7. Network frequency Hertz problem
Many routers currently use dual-band routers, although current mobile phones also support 2.4 Hz and 5 Hz. Internet, but some old-fashioned mobile phones only support 2.4 Hz, and some routers are single-frequency routers. If it is exactly 5 Hz, even if it is connected, it will not be usable. The network signal cannot be transmitted normally at all. In this case, you can Buy a dual-band router and pull a cable through it. Although the corresponding network speed will be shared, this does not limit the equipment requirements.
8. The network port is powered off
In this case, it is usually because the home does not actively connect to the broadband, but from other people’s homes. If someone pulls a cable from someone else's house and has to unplug the power supply due to a power outage or rain, your router may be connected normally, but there will be no network signal transmitted there at all, because the other person's home is equivalent to yours. After they lose power or due to a sudden power outage or sudden call, their network terminal is damaged. No matter how your branch line is connected to the router, there is no network. You must wait for it to be repaired and then restart the router. .
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9. The modem power is turned off and the router cannot dial the network. Plug in power.
10. The broadband DNS server cannot provide domain name resolution service for some reason
The external phenomenon is very similar to being unable to access the Internet, and it is easy to be confused as a network failure. Contact customer service.
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