多项选择题
A.reduces routing table entries
B.auto-negotiation of media rates
C.efficient utilization of MAC addresses
D.dedicated communications between devices
E.ease of management and troubleshooting
多项选择题 What are three advantages of VLANs? （）
单项选择题 Three switches are connected to one anther via trunk ports.Assuming the default switch configuration,which switch is elected as the root bridge for the spanning-tree instance of vlan 1?（）
多项选择题 Refer to the exhibit.Which two statements are true of the interfaces on switch1?（）