What is the most probable cause of jitter?
A.
Variable delay
B.
Dropped packets
C.
Impedance mismatch
D.
Excessive delay
Explanation:
Jitter in Packet Voice Networks Jitter is defined as a variation in the delay of received packets.At the sending side, packets are sent in a continuous stream with the packets spaced evenly apart. Due to network congestion, improper queuing, or configuration errors, this steady stream can become lumpy, or the delay between each packet can vary instead of remaining constant.
This diagram illustrates how a steady stream of packets is handled.
When a router receives a Real-Time Protocol (RTP) audio stream for Voice over IP (VoIP), it must compensate for the jitter that is encountered. The mechanism that handles this function is theplayoutdelay buffer. The playoutdelay buffer must buffer these packets and then play them out in a steady stream to the digital signal processors (DSPs) to be converted back to an analog audio stream. Theplayoutdelay buffer is also sometimes referred to as the de-jitter buffer.
