中国大学MOOC: They use computers to keep the traffic____（run）smoothly.

Which two statements are true about traffic shaping and traffic policing？（） A: both traffic shaping and traffic policing cause retransmissions of connection-oriented protocols such as TCP B: both traffic shaping and traffic policing support the marking and re-marking of traffic C: the effects of traffic shaping and traffic policing when configured on a router are applied to outgoing traffic D: traffic shaping queues excess traffic whereas traffic policing discards excess traffic E: traffic shaping allows the traffic to exceed the bit rate whereas traffic policing prevents the traffic from exceeding the bit rate

The following are not road traffic signals ( ). A: traffic light B: traffic sign C: traffic information board D: traffic police command

Children should be taught to read __________ A: traffic signs B: traffic island C: traffic jam D: traffic police

A traffic conflict is equivalent to a traffic accident.( )

They didn’t catch the train hecause of ( ) A: some heavy traffic B: any heavy traffic C: a heavy traffic D: heavy traffic

“空中交通管制”可以表达为"_____". A: air traffic warning B: air traffic control C: traffic control D: air traffic clearance

Which two characteristics are common between traffic policing and traffic shaping？（） A:  The rate of traffic is measured and compared to a configured policy. B:  Classification is used to differentiate traffic. C:  Traffic is marked and sent out according to priority. D:  Both can be applied to inbound and outbound traffic. E:  Both buffer traffic to ensure a predetermined traffic rate. F:  Both drop traffic that is above a predetermined traffic rate.

If you encounter bumper-to-bumper traffic, it means the traffic is extremely smooth.

If people the traffic rules, there would be fewer traffic jams and accidents.