多项选择题
A.software voice applications
B.multipoint control unit （MCU）
C.gatekeeper
D.call agent
E.interactive voice response （IVR） systems
F.softphones
多项选择题 WhichthreeQoSmechanismscanbeconfiguredtoimproveVoIPqualityonaconvergednetwork？（）
单项选择题 You need to troubleshoot some problems in the Company VOIP network associated with jitter. What is the cause of jitter？ （）
多项选择题 The Lightweight Access Point Protocol （LWAPP） is in use within the Company wireless network. Which two statements correctly describe features of this protocol？ （）