单项选择题
An IS-IS router is adjacent to and passing traffic with a neighbor. You perform a show is interface detail command and notice that for some interfaces you have a circuit type of 3. Which IS-IS level（s） is enabled on these interfaces？（）
A.Level 1 only B.Level 2 only C.Level 1 and Level 2 D.Level 3 only
单项选择题 Whichof the following multicastmodedoesAuto-RPrequire？（）
多项选择题 WhichtwoaredefaultpreferencevaluesforbothinternalandexternalIS-ISLevel2routesonaJuniperNetworksrouter？（）
多项选择题 WhatarecommandsthatcanbeusedtoconfigureMBGPformulticast？（）
