What is Dynamic DNS?

Dynamic DNS (English: Dynamic DNS , DDNS for short) is a technology in the Domain Name System (DNS) that automatically updates the content of the name server. According to the rules for Internet domain names, domain names must follow a fixed IP address. However, the dynamic DNS system provides a fixed name server for the dynamic domain. Through real-time updates, external users can connect to the dynamic user's URL.

Dynamic DNS (English: Dynamic DNS , DDNS for short) is

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The Domain Name System (English: Domain Name System, Acronym: DNS ) is a service of the Internet. As a distributed database that maps domain names and IP addresses to each other, it can make people more convenient to access the Internet. DNS uses TCP and UDP port 53. Currently, the limit for the length of each domain name is 63 characters, and the total length of a domain name cannot exceed 253 characters.

Initially, the characters of a domain name were limited to a subset of ASCII characters. In 2008, ICANN passed a resolution allowing the use of other languages as characters for Internet TLDs. Using the IDNA system based on Punycode, Unicode strings can be mapped to a valid DNS character set. Therefore, domain names such as "XXX.China" and "XXX.Taiwan" can be entered and accessed directly in the address bar without the need to install a plug-in. However, due to the widespread use of English, the use of characters from other languages as domain names can cause a variety of problems, such as difficulty in typing and international promotion. ^[1]