This cache is the first place the browser checks (if it has this capability) to find the IP address of the requested domain. The web browser starts this process by utilizing an internal cache of recent DNS query results. When a website address is typed into a browser, like, the browser response is to convert this URL into the correct IP address for this website.
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What is a Recursive DNS Server?Īll domains are assigned a unique IP address on the Internet. It provides secure authentication for the origin of the DNS data, helping to safeguard against attacks and protect data integrity. An authoritative DNS domain name server is a definitive source for DNS domain name resolution.ĭNS security technology is used to protect DNS information stored as a record in the Domain Name System (DNS). An authoritative DNS ultimately allows a web browser with the URL request to reach the IP address needed to access a website or other web resources. It is the last server in a DNS lookup chain that responds with the queried DNS record. Authoritative DNS servers also provide essential DNS information for each website (corresponding IP addresses, a list of mail servers and other DNS record information).Īn authoritative DNS server holds and maintains DNS records. What is an Authoritative DNS Server?Īuthoritative DNS servers are the DNS infrastructure that satisfies requests from recursive DNS servers (discussed below) with the corresponding IP address information. It directly responds to requests for DNS records in the root zone by returning an appropriate list of the authoritative TLD name servers for the appropriate TLD that can resolve the initial DNS lookup request for an IP address of that domain name. and responds by directing that request to a top-level domain (TLD) nameserver, based on the TLD of that domain such as. A root server (also called a DNS root nameserver) receives a DNS query that includes a domain name (e.g.
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When a user needs to load a webpage, a conversion must occur between what a user types into their web browser ( into an IP address required to locate the The DNS system is an open worldwide network of database name servers that include 13 authoritative name servers that serve the DNS root zone level, known as "root servers". Using the is the domain name, and into an IP address (such as 192.0.2.1). For example, when a Web address (URL) is typed into a browser, a DNS query is made to learn an IP address of a Web server associated with that name.
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The Domain Name System (DNS) is the Internet's system for mapping alphabetic names to numeric Internet Protocol (IP) addresses like a phone book maps a person's name to a phone number. What is a Domain Name and How Does DNS work?