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? （）
A. supports VLSM B. link - state routing protocol C. operati on is similar to BGP D. supports two routing levels within an autonomous system
多项选择题 Refer to the exhibit. Which two statements are true?（）
多项选择题 What two situations could require the use of multiple routing protocols? （）
多项选择题 Which two statements are true about the rendezvo us point (RP) in a multicast network?（）
