多项选择题
A.Unknown destination MAC address
B.Bad cabling
C.MAC forwarding table is full
D.Port configured for half duplex
E.Port configured for full duplex
F.Network congestion
多项选择题 WhichofthefollowingisavalidhostIPv6address？（Chooseallthatapply.）（）
多项选择题 WhichofthefollowingarenotBGRPdatastructures？（Chooseallthatapply.）（）
单项选择题 Severaltroubleshootersareabouttoworkonthesameproblem.Whichofthefollowingtroubleshootingmethodswouldbemostappropriatetomakethebestuseofthetroubleshooters1time？（）