OSI Layers - Session, Presentation, & Application Layer | Very Important Protocols | English

[ENGLISH] 🌐 OSI Model Layers 5-7 Explained | Session, Presentation & Application Layers | Protocols & Functions | GATE & UGC NET Master the top three layers of the OSI model with this comprehensive guide! Perfect for GATE, UGC NET, university exams, and networking professionals, this video breaks down the Session, Presentation, and Application layers, their core functionalities, and the most important protocols you need to know. ✅ What You’ll Learn: Session Layer (Layer 5): Authentication, authorization, session restoration (checkpointing), synchronization, and its use in applications like webinars, online banking, and video conferencing Presentation Layer (Layer 6): Code conversion (ASCII ↔ EBCDIC), encryption/decryption, data compression, and optimization for network transmission Application Layer (Layer 7): The interface for end-users, enabling network services with key protocols, port numbers, and transport types (TCP/UDP) Must-Know Protocols: HTTP (80), HTTPS (443), FTP (20/21), SSH (22), DNS (53), SMTP (25), DHCP (67/68), Telnet (23), and more Exam Focus: Covers the most frequently tested protocols and concepts in competitive exams like GATE, UGC NET, and networking certifications 🎯 Perfect For: Computer Science & IT students Network engineers and professionals Anyone preparing for technical interviews and competitive exams 📌 Why Watch This Video? Clear explanation of OSI Layers 5–7 functions Practical examples of protocol use in real-world applications Essential knowledge for networking exams, certifications, and interviews #OSILayers #SessionLayer #PresentationLayer #ApplicationLayer #Networking #Protocols #TCP #UDP #GATE #UGCNET #ComputerNetworks