ARP协议的作用是由IP地址求MAC地址。ARP请求是广播发送，ARP响应是（）发送。

A．To give it to his wife as a gift.B．To show off his wealth and power.C．To commemorate his beloved wife.D．To live with his family in it.

A.To
B.
B．To
C.
C．To
D.
D．To
E.

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下面哪些攻击属于服务攻击（）I.邮件炸弹攻击II.源路由攻击III.地址欺骗攻击IV.DOS攻击

A.I和II
B.II和III
C.II和IV
D.I和IV

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