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.

How is the traffic during the rush hourThe traffic moves very ______.