Question: 1 ) What does destination - based forwarding mean? 2 ) Are input port, switching fabric, and output ports implemented in hardware or software? Why?

1) What does destination-based forwarding mean?
2) Are input port, switching fabric, and output ports implemented in hardware or software? Why?
3) What is the service model of the Internets network layer?
4) What are the key differences between routing and forwarding?

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