What is the connection between domain names and IP addresses?
Analysis:
We know that every computer has a unique IP address, which is particularly difficult to remember, so today's DNS (domain name) appeared.
When our computer wants to connect to a remote machine, we can apply to connect to the DNS under the IP address of the machine, for example: www.baidu.com. When connecting, DNS will provide an IP address for the server to find. Therefore, when we enter: www.baidu.com in the URL, we will get the Baidu IP and jump to the page.
Domain name and IP address
The domain name is relative to the website, and the IP address is relative to the network. To be precise, it is done through the dns server. Yes, you submit a domain name, it returns an IP address to you (also called domain name resolution), and then makes a response and returns the information.
That is:
Enter the domain name----the domain name resolution server (dns) resolves it into an IP address---access the IP address---complete the content of the access--- Return information
The representation method is different
The domain name is www.***.***; the IPv4 address is: 32-bit binary (divided into 4 An 8-digit dotted decimal number)
The mapping relationship is different
The IP address on the Internet is unique, and one IP address corresponds to one computer
A domain name corresponds to one IP address or multiple IP addresses.
A computer can have multiple services, that is, one IP address corresponds to multiple domain names.
The above is the detailed content of What is the connection between domain names and IP addresses?. For more information, please follow other related articles on the PHP Chinese website!
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