Which H.245 information is exchanged within H.225 messages in H.323 Fast Connect?

Which H.245 information is exchanged within H.225 messages in H.323 Fast Connect?
A . Terminal Capability Set
B . Open Logical Channel
C . Master-Slave Determination
D . Call Setup
E . Call Progress

Answer: B

Explanation:

With the standard H.245 negotiation, the two endpoints need three round-trips before they agree on the parameters of the audio/video channels (1. master/slave voting, 2. terminal capability set exchange, and finally, 3. opening the logical channels). In certain situations and especially with high-latency network links, this can last too long and users will notice the delay.