DNS (Domain Name System)
protocolintermediate
name resolutioninternet infrastructureweb browsing
A system that translates human-readable domain names into IP addresses, affecting the speed of initial connections to websites.
Examples
Website visit
When you type 'google.com', DNS translates it to IP address like 142.250.80.46
DNS providers
Google DNS (8.8.8.8), Cloudflare (1.1.1.1), OpenDNS provide public DNS services
Typical Values
DNS lookup time20-120ms
Cached DNS<1ms
Common Misconceptions
- •DNS only affects initial connection - not download speeds
- •Changing DNS won't bypass geo-restrictions (that's what VPNs do)
Optimization Tips
Use fast public DNS like 1.1.1.1 or 8.8.8.8
Enable DNS caching on your router
Use DNS-over-HTTPS for privacy
User Impact
Web browsing
Slow DNS causes delays when loading new websites
Security
Malicious DNS can redirect to phishing sites
Troubleshooting
Issue: Websites not loading
Solution: Try changing DNS servers or flush DNS cache
Issue: Slow website connections
Solution: Switch to faster public DNS provider
Technical Details
Specification: Port 53 for standard DNS, Port 853 for DNS-over-TLS