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多选题
What are two reasons for packet loss on a VoIP connection？（）
A
serialization delay
B
overrun
C
full buffers and queues
D
propagation delay
E
shaping delay
F
TCP header errors
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单选题What is the typical marked DSCP value for a voice signaling packet in VoIP technology？（）A
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多选题VOIP has been implemented at the main office of the Company network. Which two statements are true about voice packets in a LAN？（）AVoice carrier stream utilizes Real-Time Transport Protocol (RTP) to carry the audio/media portion of the VoIP communication.BVoice traffic data flow involves large volumes of large packets.CBecause a packet loss involves a small amount of data, voice traffic is less affected by packet losses than traditional data traffic is.DVoice packets are encapsulated in TCP segments to allow for proper sequencing during delivery.EVoice packets are very sensitive to delay and jitter.
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单选题What is the goal of QoS in a network？ （）A
prevent packets from being droppedB
increase available bandwidthC
reduce hardware errorsD
provide predictable network serviceE
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