单项选择题
In JUNOS software， how is route summarization at the L1/L2 border configured？（）
A.By specifying the area-range statement. B.By creating aggregate routes and applying policies. C.By specifying the route-summarization statement. D.By specifying the area-range restrict statement.
多项选择题 Intheoutputofshowisisadjacency，whatarethreevaliditemsthatcanbedisplayedundertheattributesheader？（）
多项选择题 WhichtwoIS-IShellovaluesmustmatchtoformaLevel1IS-ISadjacency？（）
单项选择题 Whichcommandatthe[editprotocolsisis]hierarchylevelforcesroutedtraffictoavoidthisrouter？（）
