多项选择题
A.232.0.0.0/8
B.239.0.0.0/8
C.232.0.0.0/4
D.FF3x：：/32
E.FF2x：：/32
F.FF3x：：/16
单项选择题 Refer to the exhibit. Look at the command output. What would be the most probable reason for this port-ID mismatch？（）
单项选择题 WhichtypeofdomainsisinterconnectedusingMulticastSourceDiscoveryProtocol？（）
多项选择题 An802.1Qtrunkisnotcomingupbetweentwoswitches.Theportsonbothswitchesareconfiguredas"switchportmodedesirable."Assumingthatthereisnophysicalissue，choosetwopossiblecauses.（）