What is DNS? How Does It Work? DNS Record Types Guide

What is DNS?

DNS (Domain Name System) acts as the internet's phone book. It translates human-readable domain names (like iyibir.net) into IP addresses that computers use to communicate.

How DNS Works

1. Query Initiation: Browser contacts DNS resolver.
2. Cache Check: Resolver checks local cache first.
3. Root DNS Server: Directs to the appropriate TLD server.
4. TLD Server: Points to the authoritative DNS server.
5. Authoritative DNS: Returns the actual IP address.
6. Result: IP address is sent to browser, website loads.

DNS Record Types

DNS Security

• DNSSEC: Validates DNS response integrity.
• DNS over HTTPS: Encrypts DNS queries via HTTPS.
• DNS Cache Poisoning: Prevented with DNSSEC.

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