通过仔细观察，我们发现新链路层地址的邻居缓存条目会覆盖旧的条目。

Through aborative observation, we found that the Neighbor Cache entry with the new link-layer address overwrites the old.

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本文基于数据链路层地址解析协议ARP的内部工作原理，研究了图书馆网络的安全防范问题。

This paper, by analyzing internal work principle of ARP protocol, researches on security of library network.

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利用数据链路层地址解析协议(ARP)可以进行IP冲突、ARP欺骗、ARP溢出等方式的网络攻击。

Via address resolution protocol in data link layer, hackers can launch various attacks, such as IP conflict attack, ARP deceive attack and ARP overflow attack.

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