How a Switch & Router work? (Excellent Animation video) v2

In this short animation video, we have explained in detail with graphical illustration that:
1. How does a Layer-2 Switch behave when it receives a Frame with a destination MAC Address which is not in it's MAC Table yet
2. How does a Layer-2 Switch behave when it receives a Frame with a destination MAC Address which is not connected to it at all
3. How does a Router (Layer-3 device) behave when it receives a Layer3 IP Packet with a destination IP that is not in its Routing table

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