ibps-so 2016 · Question 22 of 394

The training division of Chandrabhaga Urban Bank has commissioned a system that will carry the voice of an instructor sitting at head o ce live to two hundred branches, and will also carry the recorded audio of the bank's telephone-banking calls to the quality cell. The designer has explained that the media itself cannot be sent in the manner of a le, because a listener must hear the samples in order and at the instant they are due, and that the stream must therefore be carried in small packets each bearing a sequence number, a timestamp and a marker naming the coding of the payload, so that the receiver may detect loss, restore order and play out the samples at an even rate. Such packets are ordinarily carried over UDP. The protocol that carries the audio samples themselves in that manner is:

1. ARTSP, the Real Time Streaming Protocol, which sets up and controls the session but carries no media of its own
2. BSMTP, the Simple Mail Transfer Protocol, which relays a message from one mail server to the next
3. CSNMP, the Simple Network Management Protocol, by which a station polls the managed devices of a network
4. DFTP, the File Transfer Protocol, which moves a whole le over a separate data connection
5. ERTP, the Real-time Transport Protocol, which carries the media stream with sequence numbers and timestamps for play-outCorrect