920-180 Exam
ncts real time networking
- Exam Number/Code : 920-180
- Exam Name : ncts real time networking
- Questions and Answers : 154 Q&As
- Update Time: 2011-09-21
- Price:
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Nortel NCTS 920-180 exam braindumps questions and answers
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Exam : Nortel 920-180
Title : NCTS Real Time Networking
1. What technology allows a SONET ring to act like the backplane of an Ethernet switch?
A. TDI
B. STS
C. RPR
D. VLAN
Answer: C
2. Several RTP streams can be combined into a single stream. There are two sessions with SSRC=6 and SSRC=23. Which are possible new session numbers? (Choose two.)
A. 6
B. 17
C. 23
D. 53
Answer: BD
3. In an H.248 connection model, which is the definition of a context?
A. Contexts represent the different phases of call setup.
B. Contexts represent the segregation of call server domains.
C. Contexts represent associations between collections of terminations.
D. Contexts represent the difference between signaling traffic, bearer traffic and administration traffic for a device.
Answer: C
4. Which feature is common to both TCP and RTP?
A. multicast
B. error recovery
C. session protocol
D. reliable connection
E. flow/congestion control
Answer: C
5. Which protocol is used for establishing media streams in H.323?
A. G.711
B. H.225.0
C. H.245
D. H.450
Answer: C
6. What is a 3G cellular technology?
A. Advanced Mobile Phone Service (AMPS)
B. Global System for Mobile Communications (GSM)
C. General Packet Radio Service (GPRS)
D. Code Division Multiple Access (CDMA)
E. Universal Mobile Telecommunications Service (UMTS)
Answer: E
7. When is Multiprotocol Label Switching (MPLS) local recovery chosen over MPLS global recovery?
A. When faster recovery is sought.
B. When too few Label Switch Paths (LSPs) are setup.
C. When insufficient bandwidth is available in the network.
D. When the network is NOT very meshed (small degree of connectivity).
Answer: A
8. H.248 is which type of protocol?
A. a QoS Protocol
B. a Media Gateway control protocol
C. a Peer-to-Peer call control protocol
D. a Real-Time packet encoding protocol
Answer: B
9. Which three components are H.323 endpoints? (Choose three.)
A. Gatekeeper
B. Terminal
C. Gateway
D. Multipoint Control Unit (MCU)
E. Security Relay
Answer: BCD
10. Click on the Exhibit button.
In a typical RTSP operation what type of protocol will be used with transaction C?
A. RTP
B. RTCP
C. HTTP
D. RTSP
Answer: D
11. Which application can NOT be implemented using SUBCRIBE/NOTIFY when using SIP protocol?
A. Codec Re-negotiation
B. Keypad Press Reporting
C. Message Waiting Indication
D. Presence (i.e., "Friends list")
Answer: A
12. Which statement is true concerning SIP protocol?
A. SIP is based on H.323
B. SIP is an extension of HTTP/1.1
C. SIP is a component of HTTP/1.1
D. SIP is based on a request/response transaction model
Answer: D
13. How do end users connect to an Optical Ethernet network?
A. through a DS1 interface
B. through a DS3 interface
C. through an optical SONET interface
D. through a variety of Ethernet interfaces
Answer: D
14. Click on the Exhibit button.
In a typical RTSP operation what type of protocol will be used with transaction A?
A. RTP
B. RTCP
C. HTTP
D. RTSP
Answer: C
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