单项选择题
Which of the following is the most effective technique to prevent source IPAddress spoofing？（）
A. policy based routing （PBR） B. unicast reverse path forwarding （uRPF） C. lock and keyACL D. RFC 1918filtering E. IP source routing
单项选择题 WhichtypeofattackscanbemonitoredandmitigatedbyCS-MARSusingNetFlowdata？（）
单项选择题 WhichbestrepresentsatypicalattackthattakesadvantageofRFC792，ICMPType3messages？（）
多项选择题 CiscoIOSIPSsendsIPSalertmessagesusingwhichtwoprotocols？（）
