Whichtwostatementsaretrueabouttrafficshapingandtrafficpolicing？（）

A.bothtrafficshapingandtrafficpolicingcauseretransmissionsofconnection-orientedprotocolssuchasTCP
B.bothtrafficshapingandtrafficpolicingsupportthemarkingandre-markingoftraffic
C.theeffectsoftrafficshapingandtrafficpolicingwhenconfiguredonarouterareappliedtooutgoingtraffic
D.trafficshapingqueuesexcesstrafficwhereastrafficpolicingdiscardsexcesstraffic
E.trafficshapingallowsthetraffictoexceedthebitratewhereastrafficpolicingpreventsthetrafficfromexceedingthebitrate

【参考答案】

C, D