Every object on the Internet, every server and endpoint that interacts with others, needs an Internet address. Depending on whether the protocol is IPv4 or IPv6, this address is 32 or 128 bits long. Instead of these 32- or 128-bit numbers, domain names let people use names that are easy to understand and remember and that can be associated with a corporate identity and brand. For example, the Domain Name System links the domain name www.webevi.com to an IP address such as 88.255.110.61. In order, com, webevi.com and www.webevi.com are nested Internet domains or zones.
The relationships created by the Domain Name System do not have to be one-to-one. More than one IP address can be assigned to a domain name. This applies to sites with very high traffic, such as HostingNedir.com, yahoo.com and google.com. More commonly, however, many domain names are assigned to a single IP address. This is called “Virtual Hosting”.
The Domain Name System is hierarchical. At the top are “generic” top-level domains (gTLDs) such as .com, .org, .net, .int, .edu, .info, .biz, .aero, .travel, .jobs, .gov and .mil, and country-code domains (ccTLDs) such as .tr, .us, .de, .uk, .jp and .az. More recently, a few regional top-level domains such as .eu and .asia have been added.
