多项选择题
A.Interfaces have a default metric of 1.
B.Level 1 is intra - area and level 2 is interarea.
C.Level 1 routing is between an end system (ES) and IS while Level 2 routing is between an IS and IS.
D. Hosts send ISHs while routers send ESHs.
E. IS - IS is an open standard.
F. Metrics depend on interface speed.
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?（）
多项选择题 What two situations could require the use of multiple routing protocols? （）