Denial of Service (DoS) attack is the foremost dispute in the wireless infrastructure network. DoS make the network possessions inaccessible to its authentic users. The appropriate client's identity is hoaxed and deprived of from retrieving the network because of this DoS attack. Dearth of fortification in the management frame is the imperative origin which hints to DoS attack. Though 802.11w was developed to protect the management frame, the network is vulnerable to different DoS attacks and unsuccessful to prevent all types of DoS attacks.