单项选择题
A. the serial 1/1 address
B. the serial 2/0 address
C. a randomly generated internal address
D. the configured router - id address
多项选择题 Which two statements are true about IS - IS?（）
多项选择题 Intermediate system to intermediate system (IS - IS), is a protocol used by network devices (routers) to determine the best way to forward datagrams through a packet - switched network, a process called routing. Which three attributes are of the IS - IS routing protocol? （）
多项选择题 Refer to the exhibit. Which two statements are true?（）
