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Nowadays, the IoT implementations grow rapidly in most sectors. One of the challenges faced due to this growth is performance of implemented protocol under attack that aims to destroy the system performance. One of the popular IoT protocols is message queuing telemetry transport, MQTT. This research evaluates the performance of MQTT broker under syn flooding attack. The research variable implemented is data transmission frequency. The variation of data transmission frequency is operated in publisher. Publisher sends data to broker under attack. The three difference data transmission frequencies are set representing three different conditions, i.e. high, medium and low frequency. Results show that a pattern is obtained. The higher data transmission frequency is the lower number of packet loss is obtained.

Data Transmission Frequency Effect on MQTT Protocol Under Syn Flooding Attack