题目内容:
A.TheswitchportwillperformmarkingfortheingressvoiceanddatatrafficbyusingthedefaultCoSvalueattheswitchport.
B.TheswitchportwilltrusttheCoSvalueoftheingressvoiceanddatatrafficthatcomesintotheswitchport.
C.TheswitchportwilltrusttheCoSvalueoftheingressvoicetraffic.DatatrafficwillbemarkedattheswitchportwiththedefaultCoSvalue.
D.TheswitchportwilltrusttheCoSvalueoftheingressdatatraffic.VoicetrafficwillbemarkedattheswitchportwiththedefaultCoSvalue.
参考答案: