1·Three kinds of telecommunication backbone net technology are introduced, that is, ATM technology, FR technology, IP technology, which will dominate in the future.
介绍了在今后两三年内将占主要地位的三种电信骨干网技术，即atm技术、帧中继技术和IP技术。
2·We add the function of the per interface label space based on the source code, which enables to extend the LDP implementation to systems in which the data-link layer is ATM or FR.
我们在原实现基础上添加了每端口标记空间功能，使LDP实现可以向数据链路层为ATM或者帧中继的系统扩展。