What is DNS
DNS (Domain Name System) is one of the infrastructures of the internet. This article introduces the basic concepts and working principles of DNS.
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Essentially, the DNS service is like a Xinhua dictionary. By querying the dictionary, we can find the IP address corresponding to a domain name.
Introduction to DNS
DNS (Domain Name System) is one of the infrastructures of the internet, like a Xinhua dictionary, responsible for converting human-readable domain names into computer-understandable IP addresses.
How DNS Works
When you enter a URL in your browser:
- The browser first checks the local cache
- If not found, it sends a query to the DNS server
- The DNS server returns the corresponding IP address
- The browser uses this IP address to access the target website
Key Concepts
- Domain Name: The readable address of a website, such as
www.adguardprivate.com - URL (Uniform Resource Locator): The complete web address, including protocol, domain name, and path, such as
https://www.adguardprivate.com - IP Address: The numerical identifier of a network device, such as
1.1.1.1 - DNS Server: A computer that provides domain name resolution services
- Website Hosting: Storing website files on a server to make them accessible via the internet