First, IPSEC protocol is introduced.

首先介绍了IPSEC协议。

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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。

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A secure network protocol technology such as IPSec might be used to secure the communication channel between computers on a network.

可以使用一些安全网络协议技术，例如IPSec，来保证网络上计算机间通信信道的安全性。

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Encourage deployment of IPsec and IPv6 protocol standards.

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For example, IPSec is mandatory to implement in IPv6 compliant protocol stacks, while Secure Neighbor Discovery capabilities, Privacy Addresses, and Unique Local Addresses (ULA) all provided additional security enhancements.

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