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IPv4默认路由的目的地址和子网掩码分别设置为()

IPv4默认路由的目的地址和子网掩码分别设置为()
A.0.0.0.0,255.255.255.255
B.255.255.255.255,255.255.255.255
C.0.0.0.0,0.0.0.0
D.128.128.128.128,0.0.0.0
正确答案:0.0.0.0,0.0.0.0