KB Raut
Hi everyone 👋
I'm a Network and Security Engineer passionate about simplifying complex networking concepts. On this channel, you'll find educational videos on topics like CCNA, CCNP, network security, MPLS, BGP, OSPF, VLANs, and more. Whether you're a beginner or an experienced professional, my goal is to help you enhance your skills with practical explanations and lab demonstrations.
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KB Raut
Types of Routing Protocols
1 year ago | [YT] | 3
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KB Raut
The 7 Layers of the OSI Model Explained
In the world of networking, understanding the OSI (Open Systems Interconnection) Model is crucial. It serves as a conceptual framework that standardizes network communication, ensuring interoperability between different systems and technologies. Let's break it down layer by layer:
1️⃣ Physical Layer – The Foundation of Connectivity
🔹 Deals with the physical connection between devices.
🔹 Transmits raw binary data (0s and 1s) over cables, fiber optics, or radio waves.
🔹 Includes hardware components like cables, switches, hubs, and network adapters.
2️⃣ Data Link Layer – Reliable Transmission
🔹 Manages direct node-to-node data transfer and error detection.
🔹 Divides data into frames and ensures proper delivery between devices.
🔹 Uses MAC (Media Access Control) addresses for device identification.
🔹 Example: Ethernet, Wi-Fi (802.11), MAC addresses.
3️⃣ Network Layer – Routing & IP Addresses
🔹 Determines the best path for data to travel across networks.
🔹 Handles logical addressing via IP addresses (IPv4/IPv6).
🔹 Ensures data packets are correctly forwarded between routers.
🔹 Example: IP (Internet Protocol), ICMP, ARP.
4️⃣ Transport Layer – Reliable Data Delivery
🔹 Ensures end-to-end communication and error recovery.
🔹 Uses TCP (reliable, connection-oriented) and UDP (faster, connectionless) protocols.
🔹 Manages data segmentation, flow control, and retransmission in case of data loss.
🔹 Example: TCP, UDP.
5️⃣ Session Layer – Managing Connections
🔹 Establishes, maintains, and terminates communication sessions.
🔹 Handles authentication and session restoration after network failures.
🔹 Example: RPC (Remote Procedure Call), NetBIOS.
6️⃣ Presentation Layer – Data Formatting & Encryption
🔹 Converts data into a readable format for the application layer.
🔹 Handles encryption, compression, and character encoding (e.g., ASCII, Unicode).
🔹 Ensures secure data transmission using SSL/TLS encryption.
🔹 Example: SSL/TLS, JPEG, MP3, MPEG, GIF.
7️⃣ Application Layer – User Interaction
🔹 The layer closest to the user, where applications communicate with the network.
🔹 Provides interfaces for web browsing, email, file transfers, and remote access.
🔹 Example: HTTP, HTTPS, FTP, SMTP, POP3, DNS.
Why is the OSI Model Important?
✅ Helps troubleshoot network issues efficiently by pinpointing problems at specific layers.
✅ Enables different technologies and vendors to communicate seamlessly.
✅ Provides a structured way to understand how networks operate.
Understanding the OSI Model is essential for IT professionals, network engineers, and cybersecurity experts. Mastering it gives you a strong foundation in networking!
Written by Mutagha Clinton
#Networking #OSIModel #CyberSecurity #ITInfrastructure #NetworkingFundamentals #Tech #Collaboration
1 year ago | [YT] | 4
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KB Raut
Which protocol do you prefer for dynamic routing in your network?
1 year ago | [YT] | 5
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