多项选择题
Selective packet discard(SPD)operates in the following modes().
A.normal B.select C.random D.discard E.full
单项选择题 DSCPvalue"101110"lookslikewhichIPPrecedencevaluetonon-DiffServcompliantdevices?()
多项选择题 HowdoroutersinanIS-ISLevel-1domainexittoreachotherLevel-1(L1)domains?()
多项选择题 WhichdescriptionsofNetflowiscorrect?()