本文对蓝牙技术的安全结构作了描述，详细介绍了蓝牙链路层和应用层的安全机制。
This paper presents the bluetooth security architecture, expounding the security system of the link layer and application layer.
保密以太网卡是将数据加密技术集成到网卡上，对链路层数据提供加密和认证服务的安全设备。
The Secure Ether Network Card, which is a sort of safety, integrates the data encryption technology into the network card and provides the encryption and the authentication services to the link layer.
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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