单项选择题
How do you enable interface fe-0/0/0 under the [edit protocols isis] level to form both a Level 1 and Level 2 adjacency?（）
A. set interface fe-0/0/0.0 B. set interface fe-0/0/0.0 all level C. set interface fe-0/0/0.0 level 3 enable D. set interface fe-0/0/0.0 level 1 level 2
单项选择题 How often are IS-IS Hello packets transmitted?（）
多项选择题 What are the three components of the ISO NET address?（）
单项选择题 Three IS-IS routers on a broadcast segment have different priority values configured. Which router is elected the DIS on that broadcast segment?（）
