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IPSec是网络层的安全协议,它灵活地将加密、认证、密钥管理和访问控制等结合在一起,为Internet提供了一个标准的、安全的网络环境,已经成为了构建VPN的主要方式。
IPSec is a network layer security protocol. It flexibly combines encryption, authentication, key management and access control. It provides a standard and secure network environment for the Internet and has become the main way to build VPN.