单项选择题
Which protocol provides a method of sharing VLAN configuration information between switches?（）
A.VTP B.STP C.ISL D.802.1Q E.VLSM
多项选择题 Whichofthefollowingaretypesofflowcontrol?(Choosethree.)（）
单项选择题 Acknowledgements,sequencing,andflowcontrolarecharacteristicsofwhichOSIlayer?（）
单项选择题 WhenanewtrunklinkisconfiguredonanIOSbasedswitch,whichVLANsareallowedoverthelink?（）
