Go back to 350-029 - CCIE Service Provider Written Exam

Question :-

How would you characterize the source and type in a denial of service attack on a router?
By perfornubg a show ip interface to see the type and source of the attack based upon the access-list matches
By setting up an access-list to permit all ICMP ,TCP ,and UDP traffic with the log or log-input commands ,then use the show access-list and show log commands to determine the type and source of attack
By performing a show interface to see the transmitted load "txload" and receive load "rxload" ;if the interface utilization is not maxed out ,there is no attack underway
By applying an access-list to all incoming and outgoing interfaces,turning off route- cache on all interfaces,then,when telnetting into the router perform a debug IP packet detail

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