Tunneling (RFC 2893) : it allows you to encapsulate one packet head into the other and one protocol will communicate with others through the encapsulation in the other protocol.
隧道技术(RFC 2893)：是指将一种协议报头封装在另一种协议报头中，这样，一种协议就可以通过另一种协议的封装进行通信。
The implementation of IP-over-IP tunneling (IPIP) and the Generalized Routing Encapsulation (GRE) protocol is based on the creation of a virtual device.
IPIP的实现和通用路由封装协议是基于一个虚拟设备的创建。
For its outstanding ability on constraint-based routing and multi-protocol encapsulation, more and more ISPs accept MPLS as fundamental technology for future networks.
依据在约束路由和多协议封装两方面的巨大优势，多协议标签交换（MPLS）已经被越来越多的服务商接受为未来互联网络的基本技术。
For its outstanding ability on constraint-based routing and multi-protocol encapsulation, more and more ISPs accept MPLS as fundamental technology for future networks.
依据在约束路由和多协议封装两方面的巨大优势，多协议标签交换（MPLS）已经被越来越多的服务商接受为未来互联网络的基本技术。
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