多项选择题
A.A new switch has no VLANs configured.
B.Connectivity between VLANs requires a Layer 3 device.
C.VLANs typically decrease the number of collision domains.
D.Each VLAN uses a separate address space.
E.A switch maintains a separate bridging table for each VLAN.
F.VLANs cannot span multiple switches.
多项选择题 A network administrator changes the configuration register to 0x2142 and reboots the router. What are two results of making this change?（）
单项选择题 WhichcommandcanbeusedtoverifytheDLCIdestinationaddressinaFrameRelaystaticconfiguration？（）
单项选择题 Whichlayer2protocolencapsulationtypesupportssynchronousandasynchronouscircuisandhasbuilt-insecuritymechanisms？（）