Abstract: Stochastic Fairness Qucucing (SFQ) is a typical mplementation of Fair Qucucing (FQ). UDP flooding is a common way to launch a DDoS attack. In this paper, a comparative study was made between the widely used FCFS (First Come First Served) and SFQ on their efficacy in mitigating UDP flooding. Simulation results based on Network Simulator 2 show that FCFS has little effect on UDP flooding mitigation while SFQ is more effective.

Key words: UDP flooding, Queue scheduling, DDoS, SFQ, Attack mitigation