Assume endpoints T1 and T2 are registered with the same SC node zone (signaling routing is enabled on the SC). After T1 calls the number of T2 using H.323, T1 communicates with T2. How many TCP connections are established in this process?
Answer(s): B
With signaling routing enabled on the SC, both the H.225 call signaling and the H.245 control channel are each split into two TCP legs (T1SC and SCT2), resulting in 2 × 2 = 4 TCP connections.
The main functions of H.245 include capability negotiation, video encoding, and master-slave determination.
Which of the following statements is false about point-to-point calls?
Answer(s): A
Alerting is part of the H.225 call-signaling sequence, not the RAS interface, so it is not used over the RAS channel.
Assume endpoints T1 and T2 are registered with the same SC node zone. After T1 calls the number of T2 using H.323, T1 and T2 communicate with each other. Which of the following statements are true about the call process? (Choose all that apply.)
Answer(s): A,C,D
H.225 RAS messages (registration, admission, status) always traverse the SC (gatekeeper) for endpoints in the same zone.RTP media is exchanged directly between T1 and T2 once the call is established. The call control sequence involves H.225 RAS (registration/admission), H.225 call signaling (SETUP/CONNECT), and H.245 control for capabilities.
Which of the following registration information types are carried in an RRQ to register with the GK? (Choose all that apply.)
Answer(s): B,C,D
An RRQ conveys the endpoint's network address information (IP address and associated port number) along with its H.323 ID alias to the gatekeeper for registration.
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