In this illustration we see, from left to right: two arrows representing the flow of data pointing rightward, the top one black and the bottom one blue. These arrows are labeled "Arrivals." The data arrives at a triangle labeled "Classify," and the data splits into separate queues, one on top and one below. The top queue is labeled "High-priority queue (waiting area)," and the bottom queue is labeled "Low-priority queue (waiting area)." Each queue appears as a series of vertical bars; the top queue contains four white bars followed by our dark blue bars, while the bottom queue contains six white bars followed by two light blue bars. The data leaves its respective queue and both streams of data arrive at a circle labeled "Link (server)." The data leaves the link, once again as two arrows pointing rightward, one black and one blue, and these arrows are labeled "Departures."