单项选择题
Given the NSAP, 39.0100.0102.0001.0c00.1211.00, which portion is interpreted by IS - IS as the area?（）
A. 39 B. 39.0100 C. 39.0100.0102 D. 0001 E. 0001.0c00 F. 0001.0c00.1211
多项选择题 Which three are benefits of IS - IS over OSPF?（）
多项选择题 Which two are characteristics of the IS -IS protocol but not OSPF?（）
单项选择题 How is network layer addressing accomplished in the OSI protocol suite?（）
