13. Network Hubs Explained: Broadcasting & Collision Domains | OSI Layer 1 Devices скачать в хорошем качестве

13. Network Hubs Explained: Broadcasting & Collision Domains | OSI Layer 1 Devices

Welcome back to our Computer Networks series! Today, we are diving deep into Network Hubs, one of the core connecting devices operating at the Physical Layer (Layer 1 of the OSI Model). If you are preparing for your university semester exams, GATE CSE, or UGC NET, understanding how a Hub functions—and why it is often called a "dumb" device—is essential. We break down the broadcasting mechanism, collision domains, and the exact differences between Active, Passive, and Intelligent Hubs. 📝 Topics Covered in This Video: What is a Network Hub? (Multi-port Repeater basics). OSI Model Layer: Operating at the Physical Layer (Layer 1). The Broadcasting Problem: Why a Hub sends data to all ports and causes security issues. Types of Hubs: Active Hubs (needs power, amplifies signal), Passive Hubs (no power, just connects wires), and Intelligent Hubs. Collision Domains: Why a Hub operates in a single collision domain (Half-Duplex mode). Advantages & Disadvantages: Cost-effectiveness vs. Bandwidth wastage. Expected exam questions and numerical concepts for GATE & UGC NET. ⏳ Timestamps: 0:00 - In This Video #NetworkHub #ComputerNetworks #OSIModel #PhysicalLayer #GATECSE #UGCNET #ComputerScience #NetworkingDevices #BTechCSE #CollisionDomain