tˈɪpɪkli, ðeɪ ˈɑːpɚɹˌeɪt baɪ meɪntˈeɪnɪŋ wˈʌn ɔːɹ mˈoːɹ dɹˈɑːp slˈæʃ mˈɑːɹk pɹˌɑːbəbˈɪlᵻɾiz, ænd əkˈeɪʒənəli dɹˈɑːpɪŋ ɔːɹ mˈɑːɹkɪŋ pˈækɪts ɐkˈoːɹdɪŋ tə ðə pɹˌɑːbəbˈɪlᵻɾiz bᵻfˌoːɹ ðə kjˈuː ɪz fˈʊl.
Typically, they operate by maintaining one or more drop/mark probabilities, and occasionally dropping or marking packets according to the probabilities before the queue is full.