一日一题 Question4， 带答案

小龙

Question 4. \r\nYou are called at your desk at 2 PM. The entire Web site is down and nobody can access it anymore. You are getting hundreds of calls into your help desk and the Network Infrastructure department is sure that nothing is wrong on their end. You look at the web server utilization stats and they are pegged. You suspect that this server is under siege. What type of attack do you suspect this could be? \r\nA.        A Fraggle attack \r\nB.        DoS \r\nC.        IP Spoofing \r\nD.        TCP prediction\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nAnswer is: B. DoS\r\n\r\nExplanation: Denial-of-service attack, a type of attack on a network that is designed to bring the network to its knees by flooding it with useless traffic. Many DoS attacks, such as the Ping of Death and Teardrop attacks, exploit limitations in the TCP/IP protocols. For all known DoS attacks, there are software fixes that system administrators can install to limit the damage caused by the attacks. However, like viruses, new DoS attacks are constantly being dreamed up by hackers. \r\n