Owen

Domain Name System (DNS) records are a crucial part of the infrastructure of the Internet. A domain name is a unique identifier for a website or other resource. DNS records provide the address for that resource.

DNS records are organized into zones, and each zone corresponds to a specific part of the world. For example, the DNS zone for the United States is named “us.”.

A DNS record contains the following information:

The host name (e.g.

“example.com”).

The IP address (e. 192.

168.1.1).

The port number (e. 53)

The time to live (TTL)

The query type (A, MX, NS)

The name server (NS)

The IP address of the name server (NS)

The name server (NS) can also provide additional information, such as the serial number of the name server, the authoritative name server for a domain, or the root name servers for the domain.

A DNS record can also contain the following additional records:

The SOA record

The NSEC record

The MX record

The CNAME record

The A record

The PTR record

The TTL record

The SOA record specifies the primary name server for the zone. The NSEC record specifies the NSEC data for the zone. The MX record specifies the mail exchange records for the zone. The CNAME record specifies the canonical name for the zone.

The A record specifies the address records for the zone. The PTR record specifies the pointer records for the zone. The TTL record specifies the time to live for the zone.