What are the functions of domain name servers?

Function: 1. Resolve domain names into IP addresses; 2. Manage domain name resolution records; 3. Provide DNS caching services; 4. Support DNS load balancing; 5. Support domain name forwarding and redirection; 6. Verification User ID.

The role of the domain name server mainly includes the following aspects:

1. Resolve the domain name into an IP address: the user passes Enter the domain name, and the domain name server will resolve the domain name into the corresponding IP address, allowing users to access specific websites or servers through the domain name.

2. Manage domain name resolution records: The domain name server stores resolution records related to specific domain names, including host names, IP addresses, MX records and other information. These records help users manage and control the use of domain names.

3. Provide DNS caching service: The domain name server has a DNS caching function and can record the domain name and corresponding IP address requested by the user. When the user requests the same domain name again, the domain name server can directly return the cached result, improving the resolution speed and efficiency.

4. Support DNS load balancing: The domain name server can implement DNS load balancing and distribute user requests to multiple servers, thereby avoiding overload or crash of a single server and improving the availability and stability of the website. .

5. Support domain name forwarding and redirection: The domain name server can forward the domain name requested by the user to other servers or redirect to other websites to achieve flexible management and utilization of domain names.

6. Verify user identity: When a computer logs in to a domain name, the domain name server will identify whether the computer belongs to the domain name and verify whether the login account and password used by the user are correct. If the verification passes, the computer is allowed to access the resources of the domain name; if the verification fails, access is denied, thereby protecting the enterprise's network resources to a certain extent.

In short, the domain name server plays an important role in the Internet. It provides users with domain name resolution services, manages domain name resolution records, provides DNS caching, load balancing, forwarding and redirection, etc. services, and verify user identity, etc.

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