A serious threats is observed as the Denial of Service (DoS) attack to the stability of the Internet. In the DoS attack, a large number of systems send malicious packets that are useless to jam a victim which makes it unavailable to access the resources of the networks. The Low-rate DoS (L-DoS) attack is one of the major types of DoS attack that is not easy to detect. The various Active Queue Management (AQM) schemes have been compared to find the decrease in throughput and increase in loss rate, that results due to DoS attack. Various AQM techniques that we try to compare are: Drop-tail, Random Exponential Marking (REM), Random Early Detection (RED), Fair Queuing (FQ), Stochastic Fair Queuing (SFQ), and Proportional Integrator (PI). The throughput, end-to-end delay and loss rate are computed and plotted with respect to number of attackers and burst rate.