摘要
本文介绍了MPLS的基本原理和其相对传统网络的优势，深入分析了MPLS/VPN（基于MPLS的VPN）的特点，阐述了其主要功能，并对网络的应用进行了一定程度的分析。
In this paper, we briefly outline the fundamental principles of MPLS and its advantages compared to conventional networks. In the later sections, we dig out the characteristics and function of MPLS based VPN. Finally, we analyze its security and application to some extent.
