18 yrs experience in crime prevention, detection and investigation. Certified Ethical Hacker from Ec-Council. Certified Cyber Crime Investigator from Asian School of Cyber Laws. Presently working in the area of cyber crime investigation.
DoS or denial-of-service attack is a method used by attackers to restrict lawful users from accessing the service. This particular type of crime is done by sending multiple request commands to the server or network to authenticate requests to invalid return addresses. Since the server will be unable to find the return address of the hacker while sending the authentication approval, it will come to halt before terminating the connection. As soon as the server terminates the connection, the hacker immediately sends similar types of request commands causing the server to wait again and again for keeping the server busy.
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