Day 16 | OSI Model

*Assalamu Alaikum! Welcome to my CCNA Learning Journey.* In this video, I will explain the **OSI (Open Systems Interconnection) Reference Model**, a standard reference framework developed by ISO to understand how network devices communicate with each other. 📌 *Topics Covered in This Video:* 🔹 What is the OSI Reference Model? 🔹 Why do we need the OSI Model? 🔹 Understanding the 7 Layers of the OSI Model: 1. Application Layer 2. Presentation Layer 3. Session Layer 4. Transport Layer 5. Network Layer 6. Data Link Layer 7. Physical Layer 🔹 Functions of Each OSI Layer 🔹 Application Layer Protocols: HTTP, HTTPS, FTP, SMTP 🔹 Transport Layer Protocols: TCP and UDP 🔹 Data Encapsulation and PDU: Data, Segment, Packet, Frame, and Bits 🔹 Source and Destination IP Addresses 🔹 Source and Destination MAC Addresses 🔹 How Data Travels from Sender to Receiver 🔹 How Switches Forward Frames Using MAC Addresses 🔹 How Routers Forward Packets Using IP Addresses 🔹 Understanding the Role of Physical Devices 🔹 OSI Model vs TCP/IP Model 🎯 *Practical Understanding:* Learn how data travels through different OSI layers, how switches and routers process network traffic, and how the OSI Model helps us understand real-world networking. This video is part of my CCNA learning journey, where I am learning networking concepts, building labs, and sharing my knowledge step by step. If you are learning CCNA, Network Essentials, or Computer Networking, this video will help you build a strong foundation. 👍 Like the video if you find it helpful. 💬 Comment below if you have any questions. 🔔 Subscribe for more networking tutorials and practical labs. #CCNA #OSIModel #Networking #ComputerNetworking #TCPIP #Cisco #NetworkEngineering #CCNALearningJourney #DataEncapsulation #NetworkingBasics