920-180 Exam

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Exam : Nortel 920-180
Title : NCTS Real Time Networking


1. 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

2. 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

3. 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

4. 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

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

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