单项选择题
A.802.11B
B.spanning-tree
C.802.1Q
D.ISL
E.VTP
F.Q.921
多项选择题 Refer to the exhibit. On the basis of the information provided in the exhibit, which two sets of procedures are best practices for Layer 2 and 3 failover alignment?（）
多项选择题 YouneedtodesigntheVLANschemefortheCompanynetwork.WhichtwostatementsaretrueaboutbestpracticesinVLANdesign？（）
单项选择题 Companyuseslayer3switchesintheCoreoftheirnetwork.WhichmethodofLayer3switchingusesaforwardinginformationbase（FIB）？（）