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tods5eshoes · Wysłany: Pon 21:52, 14 Mar 2011 Temat postu: a&f 4270

920-803 Torrent
Exam: Nortel 920-803 ExamTitle: Nortel technology standards and protocol for ip telephony solutions1. A video conference is in progress between two networked locations using gigabit Ethernet. The video conferencing application is using User Datagram Protocol (UDP) to transport the video and audio data. Why should UDP be used instead of Transmission Control Protocol (TCP)? A. TCP CANNOT handle streaming data applications. B. UDP is better than TCP at seamlessly synchronizing voice and video together. C. UDP serves as an efficient transport for handling real-time application traffic. D. UDP uses less bandwidth than TCP in a WAN,[link widoczny dla zalogowanych], but more bandwidth than TCP in a LAN. Answer: C2. How does Real-Time Control Protocol (RTCP), the control protocol of Real-Time Protocol (RTP), assist RTP in handling packetized voice in an IP telephony environment? A. Controls the RTP data flows. B. Identifies sources and provides QoS feedback. C. Interoperates with Transmission Control Protocol (TCP). D. Controls the network bandwidth used by RTP data flows. Answer: B3. Which CODEC delivers the greatest compression? A. B. 711C. D. 723. 1E. F. 726G. H. 729I. J. 729AAnswer: C
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