Domain name resolver definition
Enterprises, governments, non-governmental organizations and other institutions or individuals register domain names The name registered on the Internet is the network Address for mutual communication between enterprises or institutions on the Internet.
An item in an Internet address, such as a hypothetical string of easy-to-remember characters corresponding to an Internet Protocol (IP) address, consisting of several characters from a It consists of 26 Latin letters from z to z, 10 Arabic numerals from 0 to 9, and symbols "-" and "." and is arranged according to a certain level and logic. Currently, some countries are developing domain names in other languages, such as Chinese domain names. Not only is the domain name easy to remember, but even if the IP address changes, the domain name can remain unchanged by changing the resolution correspondence.
The network communicates and connects based on the TCP/IP protocol. Each host has a unique identification fixed IP address to distinguish the hosts on the network. Thousands of users and computers. The network uses a unique and universal address format when distinguishing all connected networks and hosts, that is, every computer connected to the network
Computers and servers are assigned a unique address. In order to ensure the uniqueness of the IP address of each computer on the network, users must apply for registration with a specific organization, which allocates IP addresses based on the network size and recent development plans of the user unit. The address schemes in the network are divided into two sets: IP address system and domain name address system.
These two address systems are actually in a one-to-one correspondence. IP addresses are represented by binary numbers. Each IP address is 32 bits long and consists of 4 numbers less than 256. The numbers are separated by dots. For example, 100.10.0.1 represents an IP address. Since the IP address is a digital identifier, it is difficult to remember and write when using it. Therefore, a symbolic address scheme was developed on the basis of the IP address to replace Numeric IP address. Each symbolized address corresponds to a specific IP address, making it much easier to access resources on the network. This character address corresponding to the numeric IP address on the network is called a domain name.
It can be seen that the domain name is the name of the organization that accesses the Internet. It is an organization that accesses the Internet through a computer.address in this network. If a company wants to build its own homepage on the Internet, it must obtain a domain name. The domain name also consists of several parts, including numbers and letters. Through this address, people can find the required details on the Internet
. Domain names are important identifiers of Internet-connected units and individuals on the Internet. They serve as identification functions, allowing others to identify and retrieve the information resources of a certain enterprise, organization or individual, thereby better realizing resource sharing on the Internet. In addition to the identification function, in a virtual environment, domain names can also play a role in guidance, promotion, and representation.
In layman's terms, a domain name is equivalent to a family's house number. Others can easily find you through this number.
Domain name resolver is an intermediary that converts domain names into the IP address of the host. Usually when surfing the Internet, you type in a domain name address, and the computer will first search the DNS server for the corresponding IP address. After the server finds the corresponding value, it will return the IP address to your browser. At this time, the browser sends out a message based on this IP address. Browse request, thus completing the process of domain name addressing. The operating system will save the corresponding values of your commonly used domain names and IP addresses. When you browse frequently visited websites, you can directly extract the corresponding IP addresses from the system's DNS cache to speed up your connection to the website.
