指出了IP网络中二层网络设备和三层网络设备的安全性问题以及当前路由协议的一些安全隐患。
We point out security problems in layer-2 and layer-3 devices in IP networks and hidden troubles in the current versions of certain kinds of routing protocols.
IPSEC协议是IETF组织为在IP层提供安全通信而制定的网络安全标准，能为IP及其上层协议提供安全保证。
IPSEC protocol is a kind of network security standard which is framed by IETF organization for safe communication, and it can be used to provide security protection for IP and higher layer protocols.
IPSEC协议是IETF组织为在IP层提供安全通信而制定的网络安全标准，能为IP及其上层协议提供安全保证。
IPSEC protocol is a kind of network security standard which is framed by IETF organization for safe communication, and it can be used to provide security protection for IP and higher layer protocols.
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