5. a) Explain how the Random Early Detection approach reduces congestion in a network. b) In your opinion, is Random Early Detection more fair or less fair than the Traffic Throttling approach? (To receive credit for this part, you must give a good reason to back up your opinion.) 6. Explain the difference between virtual circuit switching and the datagram, or connectionless, approach for packet delivery in a network and include at least one advantage and one disadvantage of each approach