Wiki Article · Cinematic

Recursive Resolver

Recursive resolver (ya "recursive DNS resolver", "DNS recursor") ek DNS server hai jo client ki…

Overview

Recursive Resolver — Quick Facts

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Property: Detail

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Concept Name: Recursive Resolver (DNS Recursor)

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Type: DNS Infrastructure Component

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Domain: Networking / Internet…

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Infobox

📚 | Property | Detail | |---|---| | Concept Name | Recursive Resolver (DNS Recursor) | |…

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Kyun Zaroori Hai

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Har ek website visit = kam se kam…

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Ek average web page load = 10-50…

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Google Public DNS alone daily…

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Bina recursive resolvers ke…

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DNS Ka Brief Overview

🎯 Recursive resolver samajhne ke liye pehle DNS hierarchy samajhni zaroori hai: DNS…

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How Recursive Resolution Works

⭐ Jab tum browser me www.example.com type karte ho, yeh poora sequence hota hai:…

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Recursive vs Iterative Resolution

🔑 DNS resolution do tareeqe se ho sakti hai — recursive aur iterative: Comparison Table | #…

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Recursive Resolver Architecture

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Client queries accept karta hai…

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Rate limiting apply karta hai (DoS…

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Query validation (malformed…

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Client authentication (enterprise…

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Caching in Recursive Resolvers

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TTL = 3600 → 1 ghanta cache karo

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TTL = 86400 → 24 ghante cache karo

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TTL = 60 → sirf 1 minute cache…

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Query: "google.com ka IP?" →…

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Security Considerations

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Attacker fake DNS responses inject…

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Protection: DNSSEC, source port…

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Attacker chhoti query bhejta hai…

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Resolver bada response victim ke…

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Performance Optimization

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TTL expire hone se pehle…

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Popular domains ka cache never…

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Same IP address multiple…

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Client automatically nearest…

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Public Recursive Resolvers

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Speed priority: Cloudflare…

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Security priority: Quad9 —…

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Privacy priority: Cloudflare ya…

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Reliability priority: Google DNS —…

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Enterprise aur ISP Deployment

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Aksar slower than public resolvers

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Privacy concerns — ISP saari DNS…

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Kuch ISPs DNS queries manipulate…

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DNSSEC validation support — Not…

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Common Issues aur Troubleshooting

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Resolver overloaded (too many…

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Cold cache (resolver recently…

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Upstream servers slow ya…

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Resolver cache size increase karo

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Glossary

🔑 | # | Term | Meaning | |---|---|---| | 1 | Recursive Resolver | DNS server jo client ki…

Comparison

Recursive vs Iterative Resolution

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1: Who does the work

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2: Client complexity

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3: Response type

Diagram

Visual Flow

📊 Diagram visualization — details in narration

Quiz — Question 1

Recursive Resolver ka sabse sahi definition kya hai?

Quick Quiz

Quiz — Question 2

Recursive Resolver ka 'Concept Name' kya hai?

Complete! 🎉

Recursive Resolver Complete!

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