A Domain Name System (DNS) is a name service that associates various information with domain names. The domain names are translated to IP addresses needed for locating and retrieving the web addresses and identifying services with the underlying network protocols
A DNS server stores several records:
| Record | Function |
|---|---|
| A | Stores and returns 32-bit IPv4 addresses |
| AAAA | Stores and returns 64-bit IPv6 addresses |
| CNAME | Stores name aliases |
| TXT | Originally meant to store human-readable text data but currently is used to store machine-readable data |
| SRV | Locates service records |
| PTR | Pointer to a canonical name. For reverse IP lookup |
| MX | Mail exchange servers that map emails to IP addresses |
For phone-wide ad-blocking and content filtering, I use all.dns.mullvad.net in the Private DNS option in my Pixel 7 |