Brianna

Domain Name System (DNS) records are a database of information used by computers to locate Domain Name Servers (DNS). DNS is a hierarchical database of records that are used to translate hostnames (like www.example.

com) into IP addresses. A DNS server can answer queries about IP addresses, domain names, and other DNS information.

A DNS server can also cache DNS records for a domain. When a computer queries a DNS server for a domain name, the DNS server can look in its cache to see if it has already answered the question.

If the DNS server has already answered the question, the DNS server can skip the query to the domain name server (DNS) that holds the answer. If the DNS server does not have an answer, the DNS server can send the query to one of the domain name servers.

DNS records are organized into zones. A zone is a set of DNS records that are related to a specific domain name. For example, the zone for the domain name example.com is the DNS record for the domain name example.com. The zone for the domain name www.

com is the DNS record for the domain name www. The zone for the domain name example.net is the DNS record for the domain name example.net.

A DNS server can be configured to serve all of the zones in a domain or a subset of the zones. A DNS server can also be configured to serve only the DNS records for the domain name that is configured as the primary DNS server.

If the DNS server has already answered the question, the DNS server can send the query to the domain name server that holds the answer.

DNS records are also used to resolve Uniform Resource Locators (URLs). A URL is a string that is used to identify a resource on the Internet. For example, the URL for the website www.com is www. The URL for the website www.google.

com is www.yahoo.

A DNS server can be configured to resolve a URL that is not in its zone. A DNS server can also be configured to return the server name for a URL that is in its zone.