HTTP, FTP, SMTP & POP3 Explained | Persistent vs Non-Persistent HTTP with Examples | Hindi

Application Layer ke sabse important protocols - HTTP, FTP, SMTP, aur POP ka complete explanation Hindi mein. Persistent vs Non-Persistent HTTP, RTT Analysis, Port Numbers, aur protocol comparisons. GATE, UGC NET, aur Computer Networks exam preparation ke liye perfect tutorial. 🎯 Is Video Mein Aap Seekhenge: ✅ HTTP Protocol - Port 80, Stateless, Inband communication ✅ Persistent vs Non-Persistent HTTP connections ✅ RTT (Round Trip Time) analysis ✅ FTP Protocol - Port 21 & 20, Stateful operation ✅ SMTP Protocol - Email sending mechanism ✅ POP Protocol - Email receiving process ✅ Protocol comparison and differences ✅ TCP connection management 📚 Complete Topics Covered: HTTP (Hypertext Transfer Protocol) - Detailed: HTTP kya hai aur kaise kaam karta hai Port 80 par HTTP operation Stateless protocol concept explained Inband protocol kya hota hai HTTP request-response cycle HTTP methods (GET, POST, PUT, DELETE) HTTP Versions Comparison: HTTP/1.0 (Non-Persistent Connection): Ek request ke liye ek TCP connection Connection close after response Multiple RTT overhead Performance limitations HTTP/1.1 (Persistent Connection): Multiple requests ek connection mein Connection reuse benefits Reduced RTT analysis Pipelining concept Performance improvement RTT (Round Trip Time) Analysis: RTT calculation in networking Non-persistent HTTP RTT overhead Persistent HTTP RTT advantage Network latency impact Performance optimization FTP (File Transfer Protocol) - Complete Guide: FTP protocol architecture Port 21 for Control Connection Port 20 for Data Connection Stateful protocol kya hai Reliable file transfer using TCP Non-inband protocol concept Active vs Passive FTP mode FTP commands and responses SMTP (Simple Mail Transfer Protocol): Email sending process step-by-step Port 25 operation SMTP server communication Mail push mechanism SMTP commands (HELO, MAIL FROM, RCPT TO, DATA) Mail relay process SMTP authentication Email transfer between servers POP (Post Office Protocol): Port 110 (POP3) aur Port 995 (Secure POP3) Email retrieval from server Mail pop mechanism Download and delete vs Download and keep POP3 vs IMAP difference Client-server email communication Key Concepts Explained: Stateless vs Stateful protocols Inband vs Non-inband communication TCP reliability in application protocols Port numbers and their significance Client-server architecture Request-response model 🎓 Perfect For: Computer Networks exam preparation GATE Computer Science preparation UGC NET Computer Science BTech/BCA/MCA students Network engineering students Technical interview preparation Semester exam preparation Competitive exam aspirants 💡 Exam Focus Topics: ✅ HTTP persistent vs non-persistent (frequently asked) ✅ RTT calculation problems ✅ Protocol port numbers (must remember) ✅ Stateful vs stateless comparison ✅ FTP dual port architecture ✅ Email protocols workflow ✅ TCP reliability in application layer 🔔 Stay Tuned for More Computer Networks: Transport Layer protocols (TCP/UDP) Network Layer concepts OSI Model complete tutorial IP addressing and subnetting Routing algorithms Network security protocols DNS and DHCP explained 📌 Important Keywords: application layer protocols in hindi, HTTP in hindi, FTP in hindi, SMTP in hindi, POP in hindi, computer networks hindi, persistent http, non persistent http, RTT analysis, port numbers, stateless protocol, stateful protocol, email protocols hindi, gate computer networks, ugc net computer networks, networking tutorial hindi 🏆 Exam Questions Covered: Difference between HTTP/1.0 and HTTP/1.1 Calculate RTT for persistent and non-persistent Why is HTTP stateless? FTP port numbers and their use How does email transfer work? Protocol comparison questions Port number based MCQs 📖 Related Networking Topics: TCP three-way handshake Application layer in OSI model Web caching and proxy servers Cookie mechanism in HTTP HTTPS and SSL/TLS DNS resolution process Email architecture complete 🌐 Real-World Applications: Web browsing mechanism File upload/download process Email sending and receiving Server-client communication Network troubleshooting Protocol debugging 📊 Visual Learning: Protocol diagrams explained Connection flow charts RTT calculation examples Email transfer visualization HTTP request-response cycle #ApplicationLayer #ApplicationLayerProtocols #HTTP #FTP #SMTP #POP #ComputerNetworks #ComputerNetworksHindi #HTTPInHindi #FTPInHindi #PersistentHTTP #NonPersistentHTTP #RTTAnalysis #PortNumbers #GATE #GATEComputerScience #UGCNET #NetworkingHindi #StatelessProtocol #StatefulProtocol #EmailProtocols #TCP #NetworkingTutorial #HindiTutorial #CSExams #BTech #InterviewPreparation #NetworkingBasics #ProtocolComparison