Which type of delay is caused by the line speed of the interface?
A.
Queuing delay
B.
Serialization delay
C.
Propagation delay
D.
Packetiziationdelay
Explanation:
Serialization Delay Serialization delay (?n) is the fixed delay required to clock a voice or data frame onto the network interface, and It is directly related to the clock rate on the trunk. Remember that at low clock speeds and small frame sizes the extra flag needed to separate frames is significant.
Queuing/Buffering Delay After the compressed voice payload is built, a header is added and the frame is queued for transmission on the network connection. Because voice should have absolute priority in the router/gateway, a voice frame must only wait for either a data frame already playing out, or for other voice frames ahead of it. Essentially the voice frame is waiting for the serialization delay of any preceding frames in the output queue. Queuing delay (?n) is a variable delay and is dependent on the trunk speed and the state of the queue. Clearly there are random elements associated with the queuing delay.
PacketizationDelay Packetizationdelay(?n) is the time taken to fill a packet payload with encoded/compressed speech. This delay is a function of the sample block size required by thevocoderand the number of blocks placed in a single frame.
Packetizationdelay may also be called Accumulation delay, as the voice samples accumulate in a buffer before being released.