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2. 920-180 QUESTION 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: B,C,D QUESTION 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 QUESTION 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 QUESTION 4 Which type of protocol is H.248? 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 QUESTION 5 Which protocol is used for establishing media streams in H.323?

3. 920-180 A. G.711 B. H.225.0 C. H.245 D. H.450 Answer: C QUESTION 6 Exhibit: 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 QUESTION 7 Exhibit:

4. 920-180 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 QUESTION 8 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 QUESTION 9 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.)

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