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This is an animated video describing the difference between Layer 2 vs Layer 3 switches.

Topics Include:
Intro: 00:00
What is a switch?: 00:09
OSI model: 00:24
Layer 2 switch: 00:54
Layer 3 switch: 02:05
Example VLAN scenario: 02:37
Router vs Layer 3 switch: 04:43
Review: 05:07