【简答题】Suppose users share a 2 Mbps link. Also s uppose each user transmits contin- uously at 1 Mbps when transmitting, but each user transmit s only 20 percent of the time. suppose packet switching is u sed...
【单选题】S1:Excuse me, we want to board Motor Vessel Blue Whale. When does the service boat leave?S2:Marine No.1 leaves at 1 pm. She is over there.S1:Thank you. By the way, I'd like to buy some sack. Is there ...