Скачать или смотреть 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

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