Question

Congestion avoidance method that drops lower-priority packets if network congestion detected. Selectively drops packets when output queues reach predefined threshold.

a) RED
b) WFQ
c) FIFO
d) WRED

Answer 1

The congestion avoidance method described is Weighted Random Early Detection (WRED), which prioritizes traffic and selectively drops packets to manage congestion.

Step-by-step explanation:

The congestion avoidance method that drops lower-priority packets if network congestion is detected and selectively drops packets when output queues reach a predefined threshold is known as Weighted Random Early Detection (WRED). WRED is designed to provide congestion avoidance on network interfaces by providing buffer management and allowing for the early detection of congestion before queues become full. By setting different thresholds for different priorities of traffic, WRED ensures that high-priority traffic is less likely to be dropped than low-priority traffic.