多項(xiàng)選擇題

Refer to the exhibit.  
What are three of the basic components of a VoIP network?()

A.software voice applications
B.multipoint control unit (MCU)  
C.gatekeeper  
D.call agent
E.interactive voice response (IVR) systems  
F.softphones


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1.多項(xiàng)選擇題Which three QoS mechanisms can be configured to improve VoIP quality on a converged  network?()

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 for the VoIP traffic

2.單項(xiàng)選擇題

You need to troubleshoot some problems in the Company VOIP network associated with jitter.  
What is the cause of jitter?  ()

A. Packet drops
B. Transmitting too many small packets
C. Variable queue delays
D. Compression
E. None of the other alternatives apply