Why can't I connect to the computer with a network cable?

The reason why the computer cannot access the Internet when the network cable is connected may be a network cable failure, network configuration problem, router problem, network provider problem, firewall setting, DNS setting problem, network driver problem or other device conflicts, etc. Detailed introduction: 1. Network cable failure. Check whether the network cable is damaged or loose. If the network cable is disconnected or damaged, the network signal cannot be transmitted normally. You can try to replug and unplug the network cable to ensure that the connection is firm. If the network cable is obviously damaged, it is recommended to replace it. New network cable; 2. Network configuration problem. Make sure your computer's network configuration is correct. Open your computer's network settings and so on.

The operating system for this tutorial: Windows 10 system, DELL G3 computer.

There may be many reasons why the computer cannot access the Internet when the network cable is connected. Below I will introduce some common possible reasons and corresponding solutions.

1. Network cable failure:

First, check whether the network cable is damaged or loose. If the network cable is disconnected or damaged, network signals cannot be transmitted normally. You can try replugging and unplugging the network cable to make sure the connection is secure. If the network cable is obviously damaged, it is recommended to replace it with a new one.

2. Network configuration problem:

Make sure the computer’s network configuration is correct. Open the computer's network settings and check whether the IP address, subnet mask, default gateway, etc. are set correctly. If you are not sure how to set it up, you can choose to obtain an IP address automatically and let the router automatically assign an IP address.

3. Router problem:

Check whether the router is working properly. You can try to restart the router. Sometimes the router may malfunction and cannot connect to the network normally. In addition, check whether the router's power supply and network cable are connected properly, and ensure that the router's indicator light lights up normally.

4. Network provider problem:

If the above steps do not solve the problem, it may be a problem with the network provider. Contact the network provider to confirm whether the network service is normal and whether there is a network failure. They can provide further guidance and assistance.

5. Firewall settings:

Check the computer's firewall settings to ensure that the firewall is not blocking network connections. Sometimes firewalls mistakenly believe that a network connection is insecure and block network access. You can try to turn off the firewall or modify the firewall settings to allow network connections.

6. DNS setting issues:

DNS (Domain Name System) is a system that converts domain names into IP addresses. If the DNS settings are incorrect, it may result in the inability to access web pages normally. You can try to modify your computer's DNS settings and use public DNS servers, such as Google's 8.8.8.8 and 8.8.4.4.

7. Network driver problem:

Check whether the computer’s network driver is normal. You can check the status of the network adapter in Device Manager. If there is a yellow exclamation mark or question mark, it means there may be a problem with the network driver. You can try updating the network driver or reinstalling the network adapter.

8. Conflicts with other devices:

Sometimes, other devices may conflict with the computer, resulting in the inability to connect to the network normally. For example, if the same IP address is used, it can cause network conflicts. You can try disconnecting other devices from the network and reconnecting the computer to see if that resolves the issue.

To sum up, the reason why the computer cannot access the Internet through a network cable may be a network cable failure, network configuration problem, router problem, network provider problem, firewall setting, DNS setting problem, network driver problem or other device conflicts. When troubleshooting, you can check these possible causes one by one and take appropriate solutions. If the problem persists, it is recommended to seek help from a network professional or technical support personnel for a more accurate solution.

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