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What is the root domain name server? In view of this problem, this article introduces the corresponding analysis and answers in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible way.

The root domain name server is the necessary infrastructure for building the Internet, and the root server is mainly used to manage the home directory of the Internet. There are only 13 IPv4 root domain name servers in the world. 1 is the primary root server in the United States. The remaining 12 are secondary root servers, of which 9 are in the United States, 2 in Europe, in the United Kingdom and Sweden, and 1 in Asia in Japan.

The DNS protocol uses the UDP and TCP protocols on the port, UDP is usually used for query and response, and TCP is used for transmission between the master server and the slave server. Since the maximum length that works properly in all UDP queries and responses is 512 bytes, 512 bytes limit the number and name of the root server.

For all root server data to be contained in a 512-byte UDP package, the number of IPv4 root servers is limited to 13, and each server is named with a single letter in the alphabet, which is why the IPv4 root server is named from the alphabet.

In theory, if any form of standard domain name is to be resolved, according to the technical process, it must go through the work of the global "hierarchical" domain name resolution system. The first layer of the "hierarchical" domain name resolution system is the root server, which is responsible for managing the domain name information of countries around the world. Below the root server is the top-level domain name server, that is, the database of the relevant national domain name management agencies, such as CNNIC in China, followed by the domain name database at the next level and the cache server of ISP. A domain name must be resolved by the root database before it can be transferred to the top-level domain name server for resolution.

On the basis of full compatibility with the existing IPv4 root server architecture, the snowman project completed the installation of 25 IPv6 root servers in 16 countries around the world, including the United States, Japan, India, Russia, Germany and France in 2016. In fact, a new pattern of 13 original roots plus 25 IPv6 roots has been formed, laying a solid foundation for the establishment of a multilateral, democratic and transparent Internet governance system. China has deployed four of them, consisting of one primary root server and three secondary root servers, breaking the dilemma that China did not have a root server in the past.

The answer to the question about what the root domain name server is is shared here. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel to learn more about it.

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