多项选择题
A.VLANs increase the size of collision domains.
B.VLANs allow logical grouping of users by function.
C.VLANs simplify switch administration.
D.VLANs enhance network security.
单项选择题 A switch is configured with all ports assigned to vlan 2 with full duplex FastEthernet to segment existing departmental traffiC.What is the effect of adding switch ports to a new VLAN on the switch?（）
单项选择题 Which switch would STP choose to become the root bridge in the selection process?（）
单项选择题 A default Frame Relay WAN is classified as what type of physical network？（）