
102 Chapter 4: Per-Hop Behavior: Resource Allocation I
Frequently Asked Questions
Q — Explain the queuing mechanisms using the frequently used airline industry
analogy.
A — Comparing the queuing analogy to the airline industry, a FIFO queue is analogous
to an airline queuing model whereby passengers belonging to all classes—first,
business, and economy—have a single queue to board the plane. No service
differentiation exists in this queuing model.
CBWFQ, MWRR, and MDRR are analogous to an airline queuing service that
assigns a separate queue for each class of passengers, with a weight or bandwidth
assigned to each queue. A passenger queue is serviced ...