What is a domain name? An inventory of the relationship between domain names and IP addresses
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Frequent internet surfers have likely heard of domain names, but may not know exactly what they are. Below, we'll explain the basics.
1. What is a Domain Name?
A domain name (also known as a domain name or network domain) is the name of a computer or group of computers on the Internet, consisting of a dot-separated string of names. It is used to identify the computer's electronic location (sometimes also its geographic location) during data transmission.
The Domain Name System (DNS, sometimes simply referred to as a domain name) is a core Internet service. As a distributed database that maps domain names to IP addresses, it makes internet access more convenient without having to memorize machine-readable IP addresses.
2. The Relationship between Domain Names and IP Addresses
The relationship between IP addresses and domain names is one-to-many. One IP address can correspond to multiple domain names, but one domain name can only have one IP address. IP addresses are numerical and difficult to remember, so domain names are used to identify IP addresses.
On the Internet, domain names and IP addresses correspond one-to-one (or many-to-one). While domain names are easy for people to remember, machines can only understand IP addresses. The translation between them is called domain name resolution, which is performed by a dedicated domain name resolution server, such as the DNS. The domain name ultimately points to the IP address.
1. IP Address
An IP address is a 32-bit binary number, typically divided into four octets (or four bytes). It is a method of addressing hosts on the Internet, also known as an Internet Protocol address. The IP address is a unified address format provided by the IP protocol, assigning a logical address to every network and host on the Internet, masking differences in physical addresses.
2. Domain Name
A domain name is a name for a computer or group of computers on the Internet, consisting of a series of names separated by dots. It is used to identify the electronic location of the computer during data transmission. A domain name is a "mask" on an IP address, facilitating the memorization and communication of the addresses of a group of servers (websites, email, FTP, etc.).
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