A name server lookup is a process of querying a Domain Name System (DNS) server to obtain the mapping between a domain name and its IP address. This is done by sending a query to the DNS server, which will then return the IP address of the domain name.
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NS records, or name server records, are a type of DNS record that identifies the name servers for a domain. Name servers are responsible for resolving domain names to IP addresses, so NS records are essential for the proper functioning of the DNS system.
Each domain has at least two NS records, which point to the primary and secondary name servers for the domain. The primary name server is the main server responsible for resolving domain names to IP addresses. The secondary name server is a backup server that is used in case the primary name server is unavailable.
The Domain Name System (DNS) is a hierarchical naming system for computers, services, and other resources connected to the Internet or a private network. It associates various information with domain names assigned to each of the participants. Most prominently, it translates easily memorised domain names to the numerical IP addresses needed for locating and identifying computer services and devices with the underlying network protocols.
DNS is a distributed system, which means that the DNS database is stored on multiple servers across the Internet. This makes it more reliable than a centralised system, as it is less likely to be affected by a single point of failure.
A DNS record is a type of resource record that is stored in the Domain Name System (DNS). DNS records contain information about a domain name, such as its IP address, mail servers, and other properties.
DNS records are an important part of the Domain Name System. They allow users to easily access websites and other resources by using domain names. DNS records also provide other important functions, such as providing information about resources, caching DNS information, load balancing, and security.