单选题How would you characterize the source and type in a denial of service attack on a router？（）ABy perfornubg a show ip interface to see the type and source of the attack based upon the access-listmatchesBBy 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 underwayCBy 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 sourceof attackDBy 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
单选题
How would you characterize the source and type in a denial of service attack on a router？（）
A
By perfornubg a show ip interface to see the type and source of the attack based upon the access-listmatches
B
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
C
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 sourceof attack
D
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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