What is DNS
Essentially, the DNS service is like a Xinhua Dictionary. By querying this dictionary, we can find the IP address corresponding to a domain name.
Introduction to DNS
Section titled “Introduction to DNS”DNS (Domain Name System) is one of the fundamental infrastructures of the internet. Like a Xinhua Dictionary, it is responsible for translating human-readable domain names into computer-understandable IP addresses.
How DNS Works
Section titled “How DNS Works”When you enter a website address in your browser:
- The browser first checks local cache
- If not found, it queries a DNS server
- The DNS server returns the corresponding IP address
- The browser uses this IP address to access the target website
Key Concepts
Section titled “Key Concepts”- Domain Name: A human-readable website address, such as
www.nullprivate.com - URL (Uniform Resource Locator): A complete web address containing protocol, domain name, and path, such as
https://www.nullprivate.com - IP Address: A numeric identifier for network devices, such as
1.1.1.1 - DNS Server: Computers that provide domain name resolution services
- Web Hosting: Storing website files on servers to make them accessible via the internet