DQ 1: What is a packet? What is packet switching? How would you explain the concept of packet switching? What are the advantages and disadvantages of packet switching over circuit switching?DQ 2: How would you describe “what is the internet?” How does it works? What makes the internet the same/different (technology wise) from other packet networks? (You may need to do additional research on different WAN technologies).What’s the difference between the internet and the world wide web? DQ 3: Select one of the types of network processors such as hubs, switches, routers, and gateways?