VOIP has been implemented at the main office of the Company network. Which two
statements are true about voice packets in a LAN? (Select two)
A.
Voice carrier stream utilizes Real-Time Transport Protocol (RTP) to carry the audio/media
portion of the VoIP communication.
B.
Voice traffic data flow involves large volumes of large packets.
C.
Because a packet loss involves a small amount of data, voice traffic is less affected by
packet losses than traditional data traffic is.
D.
Voice packets are encapsulated in TCP segments to allow for proper sequencing during
delivery.
E.
Voice packets are very sensitive to delay and jitter.
Explanation:
Two major factors affect voice quality: lost packets and delayed packets. Packet loss causes
voice clipping and skips. Packet delay can cause either voice quality degradation, due to the
end-to-end voice latency, or packet loss, if the delay is variable. If the end-to-end voice
latency becomes too long (250 Msec, for example), the conversation begins to sound like
two parties talking on a CB radio. If the delay is variable, there is a risk of jitter buffer
overruns at the receiving end.