The DNS nameservers govern and maintain DNS resource records that contain information related to the name.

Item	Description
Name	full domain name
Class	Class, really only IN meaning Internet
TTL	Time-to-Live before this record expires
Data length	Length of the data
Data	The value of the record

Record types

DNS supports various types of DNS records, each serving a specific purpose in the DNS infrastructure.

A (address) record Maps a domain name to an IPv4 address.
AAAA (IPv6 address) record Map a domain name to an IPv6 address.
CNAME (Canonical Name) record Creates an alias or pointer from one domain name to another, used for creating subdomains, alias, or redirects.
MX (Mail Exchanger) record Specifies the mail servers responsible for receiving email message from a domain. Includes priority values to indicate the order in which mails servers should be used.

`dig` command

dig command in bash is used for querying DNS servers to retrieve information about domain names and DNS records. (more details on Operating Systems (OS)/Querying DNS records (dig))

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