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```html 🔍 MAC Address Explained: Uniqueness, Structure & Privacy We must correct a common misconception: a MAC address is designed to be globally unique, but it is NOT absolutely guaranteed that no duplicates exist in the world. Here's the accurate technical breakdown. ✅ What Is a MAC Address? MAC (Media Access Control) Address is: A hardware identifier Assigned to a network interface (Wi-Fi, Ethernet, etc.) Used at Layer 2 (Data Link Layer) of the OSI model Typically 48 bits long Example format: 00:1A:2B:3C:4D:5E 00-1A-2B-3C-4D-5E ✅ Structure of a MAC Address A standard MAC address is 48 bits (6 bytes) . It is divided into two parts: [ First 3 bytes ] OUI (Vendor) + [ Last 3 bytes ] Device ID 1️⃣ First Half — OUI (Organizationally Unique Identifier) ...