多项选择题
A.The use of a queuing method that will give VoIP traffic strict priority over other traffic
B.The use of RTP header compression for the VoIP traffic
C.The proper classification and marking of the traffic as close to the source as possible
D.The use of 802.1QinQ trunking for VoIP traffic
E.The use of WRED
单项选择题 YouareanetworkadministratorofalargeinvestorrelationscompanythatusesaswitchednetworktocarrybothdataandIPtelephonyservices.WhyshouldyoucarryvoicetrafficonaseparateVLAN？（）
单项选择题 According to the information presented in the following exhibit， can you tell me the reason that thetrust state of interface FastEthernet 0/3 displays "not trusted"？（）
单项选择题 JitteriscausingproblemswiththeVOIPapplicationinthenetwork.Whatcausesnetworkjitter？（）