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多选题
In which three network technologies is traffic shaping used to prevent and manage congestion？ （）
A
Asynchronous Transfer Mode （ATM）
B
data-link switching （DLSw）
C
Route Processor Redundancy （RPR）
D
Frame Relay （FR）
E
Metro Ethernet
F
Multiprotocol Label Switching （MPLS）
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多选题Which two characteristics are common between traffic policing and traffic shaping？（）AThe rate of traffic is measured and compared to a configured policy.BClassification is used to differentiate traffic.CTraffic is marked and sent out according to priority.DBoth can be applied to inbound and outbound traffic.EBoth buffer traffic to ensure a predetermined traffic rate.FBoth drop traffic that is above a predetermined traffic rate.
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多选题Which two statements are true about traffic shaping and traffic policing？（）Aboth traffic shaping and traffic policing cause retransmissions of connection-oriented protocols such as TCPBboth traffic shaping and traffic policing support the marking and re-marking of trafficCthe effects of traffic shaping and traffic policing when configured on a router are applied to outgoing trafficDtraffic shaping queues excess traffic whereas traffic policing discards excess trafficEtraffic shaping allows the traffic to exceed the bit rate whereas traffic policing prevents the traffic from exceeding the bit rate
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