Explanation:
A hub is used to send the message from one port to other ports.It does not know the specific address of the destination where the message needs to send.it works on Physical layer of the OSI model(layer 1).
A switch can handle data and it knows the specific address of the destination.A switch works on the data link Layer of the OSI model(layer 2).
It produces DC power and it's cheap to make. efficiency is low tho, better to use a alternator
Answer:
I think it was about cheaper ads on Instagram and how they are lowering their prices.
Explanation:
