Tech Terms - Bao108/SYS-255 GitHub Wiki

Source: https://www.cloudflare.com/learning/dns/dns-server-types/

---

DNS Resolver: Translates website names into IP addresses

ex. nslookup [website]
Will give you Name and IP address 

DNS registrar: Allows you to buy or rent website addresses if available

Purpose: Keeps records of registered domains

Root Name Server: Top of the DNS hierarchy that directs website traffic queries to the correct TLD

Purpose: Reads website extension to give direction
ex. .com, .org, .gov, .edu, etc

TLD Name Server (Top-Level Domain Name Server): Manages domain extensions to help find the correct address by pointing your network to the site's name server (Authoritative Name Server)

Authoritative Name Server: Stores the original DNS records for a specific domain name

DNS - Record Types

A - Address Record used to resolve a name to an IPv4 address (most common record)

CNAME - Canonical Name Record to alias one name to another

AAAA - Address Record used to resolve a name to an IPv6 address

PTR - A pointer that uses reverse DNS lookup (maps IP address back to Domain name)

MX (Mail Exchange) - Records for used for emails

NS (Name Server) record - Provides the name of the Authoritative server within a domain

SRV - A resource record that specifies hostname and port number for specific services.

SOA (Start of Authority) - Records administrative information about DNS zones