A top-level domain (TLD) is a type of domain name in the Domain Name System (DNS), which is the system that provides name resolution for the Internet. The DNS is implemented as a distributed database across multiple servers. TLDs are assigned by the Internet Corporation for Assigned Names and Numbers (ICANN) and are used to label the addresses of websites and other Internet resources. There are over 100 TLDs currently in use, including .
com, .net, and .org.
A TLD is a hierarchical namespace. The top-level domain is the root of the namespace and is followed by second-level domains (SLDs). Each SLD is a subdomain of the top-level domain. For example, the top-level domain .
com is the SLD for all websites, while the SLD .org is reserved for organizations. The second-level domains are divided into three categories: country-code top-level domains (ccTLDs), generic top-level domains (gTLDs), and internationalized domain names (IDNs).
A domain name can be registered with one of the DNS registrars. Once the domain name is registered, the registrar assigns a unique DNS name to the domain. The DNS name is composed of the top-level domain followed by the host name (the name of the computer on which the DNS server is running). For example, the DNS name for the domain name example.
com is example.com.
A domain name can also be registered with a DNS registrar that provides a custom TLD. A custom TLD is a TLD that is not assigned by ICANN. A custom TLD can be registered by anyone who wants to use it.
A custom TLD is like a regular TLD, except that it has a different set of rules governing how the domain name is composed. For example, a custom TLD can have a different set of top-level domains, a different set of SLDs, or a different set of subdomains.
A domain name can be registered with any of the DNS registrars.
A custom TLD can be registered by anyone who wants to use it. A custom TLD is like a regular TLD, except that it has a different set of rules governing how the domain name is composed. For example, a custom TLD can have a different set of top.
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