If you mean to modify the DNS on your computer or mobile phone casually, you will basically be unable to access the Internet after casually modifying it.
What is DNS? DNS means Domain Name System, domain name system.
DNS stores the correspondence table between domain names and IP addresses.
This is determined by the characteristics of the current Internet. Currently, our Internet is built based on the IP protocol. When we access a website on the Internet, we must access the IP address of the website. Our own computers do not know the IP addresses of websites, and it is difficult for us to remember the IP addresses of various websites on the Internet. What should we do? So there is DNS to help us complete this task.
For example, when we visit the Baidu website, Baidu’s domain name is www.baidu.com, but this is its domain name. If the computer doesn’t recognize it, it doesn’t know the specific address, so it has to go to DNS to query www. For the IP address of .baidu.com, DNS will answer the computer's query and tell the computer that Baidu's IP address is 123.125.115.110, so the computer can access this IP and access Baidu's website.
Related recommendations: "FAQ"
For example, if your home appliance is broken and you want to repair it, you want to call and make an appointment with XXX Electrical Repair Department, but you If you don’t know its phone number, you can dial 114. The 114 operator will tell you the phone number of XXX Electrical Maintenance Department. When you call this number, you can contact XXX Electrical Maintenance Department.
In the Internet, DNS is equivalent to the 114 directory inquiry desk on the phone.
There are various DNS servers on the Internet. Each one has different speeds and different locations. However, if your network can reach them, you can use them, which is equivalent to 11401 and 11402. ,11403...There are many inquiry numbers. However, if you do not know the specific DNS changes, it is equivalent to dialing a random number to check the phone number, and you will not get the correct IP address, and you will not be able to access websites on the Internet.
The choice of DNS is very important. Generally speaking, the access speed of each DNS is different. However, for ordinary users who are not very familiar with computer knowledge, it is recommended to use the default one given by the operator. DNS, this is more worry-free.
In short, if you are not particularly familiar with the DNS in your computer or mobile phone, it is not recommended to modify it casually, as it will cause you to be unable to access the Internet normally.
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