Is the network card a DNS problem? Repair DNS to help you restore fluency

daily online, many people have encountered web page loading circles, video buffer cards, and even the situation that the network connection is normal but cannot open the commonly used website. Many people's first reaction is to restart the router, but sometimes the problem still exists. In fact, this kind of network abnormality is most likely that DNS has failed. DNS, as the "address book" of the network, is responsible for converting the domain name into the Internet Protocol Address that the server can recognize. Once it is delayed, polluted or invalid, the network experience will plummet. This article will take you to understand the judgment method of DNS failure, as well as the specific plan to repair DNS in different scenarios, to help you quickly restore smooth network.

How to determine whether the DNS needs to be repaired?

before fixing DNS, we need to confirm that the root of the network card is indeed in DNS to avoid useless work.

1, observe abnormal network performance

if the page loads slowly but the download speed is normal, some websites cannot be accessed but can be opened by another device, and some devices under the same network have abnormal network, these are typical signals of DNS failure. Because DNS is only responsible for domain name resolution and does not affect direct IP-based network transmission, the download speed is not affected, and the failure of domain name resolution will cause the website to fail to open.

2 Detect

Windows users can press Win + R enter cmd to open the command prompt, enter ping 8.8.8.8, if you can receive a reply normally, it means that the network connection itself is no problem; then enter ping www.baidu.com, if there is a request timed out or the delay is too high, it means that there is a problem with DNS parsing. At this time, DNS needs to be repaired. Mac users can open end point through the startup desk and execute the same command to detect.

How to repair DNS in Windows?

Windows is currently the most widely used desktop system, and there are many ways to repair DNS operations for it, from simple to complex.

1, refresh DNS cache

sometimes the DNS failure is just because the local cache has the wrong resolution record. At this time, just refresh the cache to solve the problem. Open the command prompt, enter ipconfig /flushdns and ipconfig /registerdns in turn, and restart the browser after the execution is completed. Most minor DNS resolution exceptions can be solved. This method is simple to operate and will not change the original network settings. It is the preferred solution to repair DNS.

2, manually change the DNS server address

if the refresh cache is invalid, there may be a problem with the default DNS server itself. You can open the Network and Sharing Center, find the currently connected network, click Properties to select Internet Protocol version 4, manually enter the public DNS address, such as Google's 8.8.8.8, 8.8.4.4, or domestic 114.114.114.114, click OK after the settings are completed, and then test whether the network returns to normal.

3. How to repair DNS on mobile phones and routers?

in addition to computers, mobile phones and routers DNS failure will also affect the network experience, the corresponding repair DNS operation is also different.

1, mobile terminal repair DNS operation

Android users can open WLAN in Settings, find the currently connected WiFi, long press Select Modify Network, tick Show Advanced Options, change IP settings to static, and then enter the public DNS address in DNS1 and DNS2. Apple users need to open Settings, click WiFi, find the exclamation mark on the right side of the current network, click Configure DNS, select Manual and add a new DNS server address.

2, Router side repair DNS operation

If multiple devices have DNS failures at the same time, there may be a problem with the DNS settings of the router. You can open the browser to enter the management address of the router, usually 192.168.1.1 or 192.168.0.1, log in and find the DNS option in the network settings, change the default automatic acquisition to manually enter the public DNS address, save the settings and restart the router, the DNS problem of the entire network can be solved at one time, which is also an efficient way to repair DNS in batches.

4. How to optimize to avoid recurrence after repairing DNS?

fix DNS to solve the current problem, we can also reduce the probability of DNS failure happening again through some optimization settings, and maintain a smooth network experience for a long time.

1 Choose a stable public DNS server

the stability of public DNS servers in different regions is different, you can choose the server with the lowest delay through speed measurement tools. For example, domestic users choose 114.114.114.114 or Ali's 223.5.5.5, these servers have many domestic nodes, and the resolution speed is fast and stable, which can reduce the probability of DNS resolution delay and failure.

2, enable DNS cache acceleration function

part of the router and security software with DNS cache acceleration function, after opening can be commonly used domain name resolution records stored in the local, the next visit without the need to request the remote DNS server, not only can improve the resolution speed, but also in the remote DNS server failure, relying on local cache to continue to access common websites, further reducing the need to repair DNS.

To sum up, the network card is not necessarily a network speed problem, many times it is DNS failure. We can observe abnormal performance and command line detection to confirm the root cause of the problem, and then choose to refresh the cache and replace the DNS server according to different devices to repair DNS. Finally, by choosing optimization measures such as stabilizing the public DNS and turning on cache acceleration, we can avoid DNS failure from happening again. As long as you master these methods, you can quickly solve the network card problem and continue to enjoy a smooth Internet experience.