Results are presented, and discussed, of discrete event simulation and mathematical modeling exploring the quality of service (QoS) cross impacts of mixing various types of delay insensitive (e.g. web surfing) and delay sensitive (e.g. VoIP telephony) on a DOCSIS network. Of particular interest is the impact on over-the-top streaming traffic when the operator asserts QoS control over streaming services offered and managed by the cable operator.