同时给出了双层标签交换机的框架结构，分析了其性能，并指出了该方案面临的关键问题及相关解决途径。
The structure of two-layer label switching router and its performance are analyzed and some key problems facing by this scheme and related solutions are presented.
这些交换机有标签，可循环显示最有用的信息，也可隐藏所有信息。
These switches have labels, and they can be cycled to present the most useful information about them or no information at all.
这些交换机有标签，可循环显示最有用的信息，也可隐藏所有信息。
These switches have labels, and they can be cycled to present the most useful information about them or no information at all.
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