BIND 9.2.2 queries to roots BIND 9.2.2 always selects the initial root at random, but transitions to a uniform distribution in all experiments with no delay (red and green). High peaks at M & F (red) and K & E (green) in the root usage graph result from BIND's random initial root selection. In Experiment 3 (blue) with linear delay, BIND initially randomly selected H to handle root queries. For both root and .com TLD queries, BIND detects delay by evaluating RTTs and then tends to select roots with the lowest delay (A-D).