多项选择题
Refer to the exhibit. From the MAC addresses shown in the command output， to which two ports is the multicast stream 225.230.57.199 being forwarded on this switch？ （）
A.Fa6/28 B.Fa7/20 C.Gi3/7 D.Fa4/2 E.Fa4/14 F.Fa4/38
单项选择题 WhichstatementbestdescribesOSPFexternalLSAs（type5）？（）
单项选择题 ThisquestionisabouttheformationofOSPFadjacency.AnOSPFadjacencywillnotformcorrectlyacrossapoint-to-pointlinkinthesamearea.Whichwouldmostlikelycausethisproblem？（）
问答题 WhatisNBAR？
