Randall

Domain Name System (DNS) is a hierarchical naming system for computers, phones, and other devices. When a user types in a domain name, their computer queries a DNS server for the IP address associated with that domain name.

The DNS server then returns an IP address, as well as other information, such as the type of domain name, the name servers that are responsible for resolving the domain name, and the time it took to resolve the domain name. .

In order to resolve a domain name to an IP address, a DNS server relies on a hierarchy of domain name servers. The topmost domain name server in the hierarchy is called the root name server. All other domain name servers in the DNS hierarchy are called name servers. When a user types in a domain name, the computer queries the root name server for the domain name.

The root name server then queries the name servers located below it in the DNS hierarchy for the IP address associated with that domain name. If the name server is unable to find the IP address associated with the domain name, it will query one or more name servers located at the top of the DNS hierarchy for the IP address.

In order for a computer to resolve a domain name, it must be able to access the DNS server that is located at the root name server. If the computer is not able to access the DNS server at the root name server, the computer will not be able to resolve the domain name.

In addition, if the computer is not connected to the Internet, the computer will not be able to query the DNS server for the domain name.

In order for a computer to resolve a domain name, the computer must be able to query the DNS server that is located at the root name server.