多项选择题
Which two provide intra -area routing services?（）
A. L1 ES B. L2 IS C. L2 ES D. L1 IS E. L1/L2 IS
多项选择题 Which three statements are correct about the differences in IS - IS and OSPF?（）
多项选择题 Which three characteristics apply to IS - IS but not to OSPF?（）
单项选择题 Why should iBGP sessions be fully meshed within a Transit AS?（）
