单项选择题
A.ip routing
B.no ip routing
C.router eigrp 1
D.no router eigrp 1
E.mls qos
F.no mls qos
单项选择题 WhatmustbethesametomakemultipleswitchespartofthesameMultipleSpanningTree（MST）？（）
单项选择题 Refer to the exhibit. Switch 15 is configured as the root switch for VLAN 10 but not for VLAN 20. If the STP configuration is correct， what will be true about Switch 15？（）
多项选择题 WhichtwostatementsaretrueaboutBPDUport-guardandBPDUfiltering？（）
