Flashcards for Common DNS Record Types

A Record - Purpose

Maps a domain name to an IPv4 address.

A Record - Example

example.com → 192.168.1.1.

AAAA Record - Purpose

Maps a domain name to an IPv6 address.

AAAA Record - Example

example.com → 2001:0db8::1.

CNAME Record - Purpose

Provides an alias for a domain name (points one domain to another).

CNAME Record - Example

www.example.com → example.com.

MX Record - Purpose

Specifies the mail server responsible for receiving email for a domain.

MX Record - Example

example.com → mail.example.com.

NS Record - Purpose

Specifies the authoritative name servers for a domain.

NS Record - Example

example.com → ns1.example.com.

PTR Record - Purpose

Used for reverse DNS lookups (maps an IP address to a domain name).

PTR Record - Example

192.168.1.1 → example.com.

SOA Record - Purpose

Contains administrative information about the domain (e.g.

SOA Record - Example

example.com → ns1.example.com admin.example.com.

SRV Record - Purpose

Specifies the location of services (e.g.

SRV Record - Example

_sip._tcp.example.com → sipserver.example.com.

TXT Record - Purpose

Stores text information

TXT Record - Example

example.com → "v=spf1 include:_spf.example.com ~all".