This paper studies Hâ output quantized control for networked control systems (NCSs) under resilient eventâtriggered mechanism (ETM) and aperiodic denialâofâservice (DoS) attacks. First, by integrating attack information into triggering conditions, an outputâbased resilient ETM is introduced. Second, a switched system model is established, which integrates impacts of aperiodic jammer, resilient ETM, quantization, and disturbances into a unified framework. Third, less conservative exponential stability criteria are obtained with guaranteed Hâ performance. Further, sufficient conditions for coâdesigning dynamic output feedback controller and resilient ETM are presented. Finally, an example confirms effectiveness of the proposed methods.