Introduction

Domain Name System (DNS) functions as the "phonebook" of the internet. It provides mapping from human-understandable domain names to IP addresses used by computers.

4 main servers involved in a typical DNS resolution

1. DNS recursor (recursive resolver)

2. Root nameserver

3. Top-Level Domain (TLD) nameservers

4. Authoritative nameservers

Records found in a DNS server (common)

1. A: IPv4 Addresses

2. AAAA: IPv6 Addresses

3. CNAME: Canonical Name

4. SOA:Start of Authority

5. NS: Nameserver

6. MX: Mail Exchange

7. TXT: Text

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