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D. Ping of Death Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: A fraggle attack is a variation of the smurf attack for denial of service in which the attacker sends spoofed UDP packets instead of ICMP echo reply (ping) packets to the broadcast address of a large network. QUESTION 711 Peter is a Network Admin. He is concerned that his network is vulnerable to a smurf attack. What should Peter do to prevent a smurf attack? Select the best answer. A. B. C. D. E. He should disable unicast on all routers Disable multicast on the router Turn off fragmentation on his router Make sure all anti-virus protection is updated on all systems Make sure his router won't take a directed broadcast Correct Answer: E Section: (none) Explanation Explanation/Reference: Explanation: Explanations: Unicasts are one-to-one IP transmissions,by disabling this he would disable most network transmissions but still not prevent the smurf attack. Turning of multicast or fragmentation on the router has nothing to do with Peter's concerns as a smurf attack uses broadcast,not multicast and has nothing to do with fragmentation. Antivirus protection will not help prevent a smurf attack. A smurf attack is a broadcast from a spoofed source. If directed broadcasts are enabled on the destination all the computers at the destination will respond to the spoofed source,which is really the victim. Disabling directed broadcasts on a router can prevent the attack. QUESTION 712 John is using tokens for the purpose of strong authentication. He is not confident that his security is considerably strong. In the context of Session hijacking why would you consider this as a false sense of security? A. B. C. D. The token based security cannot be easily defeated. The connection can be taken over after authentication. A token is not considered strong authentication. Token security is not widely used in the industry. Correct Answer: B Section: (none) Explanation Explanation/Reference: Explanation: A token will give you a more secure authentication,but the tokens will not help against attacks that are directed against you after you have been authenticated. QUESTION 713 What is the key advantage of Session Hijacking?