单选题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 keyACLD RFC 1918filteringE IP source routing
单选题
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
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