本文在分析资源预留协议的基础上，给出一种基于IP安全协议隧道协议的虚拟专用网服务质量的实现方案。
According to the analysis of resource reservation protocol (RSVP), this paper puts forward an implementation scheme to the QoS of VPN, which is implemented by IPSec tunneling protocol.
介绍了虚拟专用网(VPN)的构建方案以及VPN服务器和客户机的具体配置过程，为远程用户访问内部网络提供了一种实用的解决方案。
Construction methods of VPN and concrete configuration processes of VPN server and client are introduced this article, which provides a practical method for remote users to visit Intranet.
服务供应商可以利用这种虚拟专用网提供端到端可扩展的、分级别的商业IP业务，而且与用户的配置和管理可以更加简单。
Service providers may use VPN to provide end to end scalable and classified commercial IP services. At the same time, the configuration and management of users will be further simplified.
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