VUE/Prometric Code:920-803
Exam: Nortel technology standards and protocol for ip telephony solutions
Q&A:55 Q&As
NCTS 920-803문제는 시험문제의 변화에 따라 업데이트가 될것입니다.시험문제가 매번 바뀐 후, 2일내에 시험문제 920-803 를 수정하여 다시 조정함으로서920-803:Nortel technology standards and protocol for ip telephony solutions가 시험문제의 점유률을 항상 96% 이상으로 확보합니다.
시험문제보기:
3. 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, but more bandwidth than TCP in a LAN.
Answer: C
4. 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: B
5. The basic attributes of Real-Time Protocol (RTP) provide for support of applications like voice and
video. Which three attributes of RTP support real-time applications? (Choose three.)
A. Timestamping
B. Packet sequencing
C. Header compression
D. Payload identification
E. Packet retransmission
Answer: ABD
6. What are two differences between IP, Asynchronous Transfer Mode (ATM) and Frame Relay (FR)?
(Choose two.)
A. ATM has a fixed cell size, but IP and FR do NOT.
B. FR has built in mechanisms within the protocol for QoS.
C. ATM is connectionless, but IP and FR are connection oriented.
D. IP is a Layer 3 protocol, but ATM and FR are Layer 2 protocols.
Answer: AD