Introduction to Network Switching | Layer 2 Fundamentals Explained

👍 Support the channel with Super Thanks 🌐 Visit https://www.telecomtech.io for blog posts, networking tips, and to sign up for the newsletter: 📚 Full networking courses, labs, quizzes, PDFs, and more! 🟥 SUBSCRIBE: https://shorturl.at/TTJxx What is network switching, and how does Layer 2 really work? In this video, we introduce the fundamentals of network switching by focusing on Layer 2 of the OSI model. You’ll learn how switches operate, how Ethernet frames are formed, how MAC addresses are used, and why Layer 2 communication is considered hop-by-hop rather than end-to-end. This is the first video in a new switching series, where we will explore the essential concepts of Layer 2 networking in a simple and structured way. We start by placing switching within the OSI model, then explain encapsulation, the Data Link sublayers (LLC and MAC), and how switches use MAC address tables to forward frames. In this video, you will learn: - Where switching fits in the OSI model - What the Data Link layer does and why it is important - How encapsulation works at Layer 2 - What MAC addresses are and how switches use them - Why Layer 2 information changes at every hop - What network switching actually means in practice This video is ideal for: - Beginners learning networking fundamentals - CCNA students - Network and telecom engineers who want a strong conceptual foundation 📌 Upcoming videos in this series will cover: Ethernet, collision and broadcast domains, VLANs and trunks, Layer 2 loops, Spanning Tree Protocol, and Layer 2 security features. ☑️ Chapter list: ============================================ 00:00 Introduction 00:27 Beginning with the OSI Model 02:20 More about Encapsulation 03:03 More about the Data Link Layer 03:53 Switching and the MAC Sublayer 05:04 Hop to Hop Communication 06:13 What is Switching? 06:57 Layer 2 Technologies 07:41 Summary 🟩 Related Videos and Links: =============================================== The MAC Address Table - https://youtube.com/shorts/--bruuCMg-4?feature=share Why is a Switch called a Swich? - https://youtube.com/shorts/HOsjL3ekPzY?feature=share 🟦 About ============================================== Welcome to telecomTech, where telecom and networking technologies... are simply explained! I’m Lazarus, a telecom professional with over 25 years of experience in network design, architecture, and telecom technologies. Over my career, I’ve led major projects, trained professionals, and helped countless individuals earn certifications and advance their careers. My goal is to make networking and telecom concepts clear, practical, and engaging—the way I wish they were taught when I started learning! Whether you’re a student, a professional growing your skills, or you're preparing for certification exams such as Cisco, telecomTech is here to guide you. Every video is crafted to help you solve real-world challenges with confidence and curiosity. Join me as we explore telecom and networking as a lifelong passion, not just as a job. Let’s make this journey of growth and discovery together! #switching #layer2 #networking #telecomtech