The word DNS is often used in work and life, but some users don't know what the function of DNS is. Let's look at the solution.

1, DNS is a service that links domain names and IP addresses. With DNS server, you don't need to enter an IP address to access the website, but you can access it by entering a URL.

2. DNS Chinese name: As a distributed database on the World Wide Web that maps domain names and IP addresses, the domain name system allows users to access the Internet more conveniently without having to remember the IP number string that can be directly read by the machine. The process of finally getting the IP address corresponding to the domain name through the domain name is called domain name resolution or hostname resolution. DNS protocol runs on UDP protocol, using port number 53. In the RFC document, RFC2 18 1 describes DNS, RFC2 136 describes DNS dynamic update, and RFC2308 describes DNS query reverse cache.

The above is an introduction to dns functions.