A.SW1#show swithport port-security interface FastEthernet 0/12 B.SW1#show swithport port-secure interface FastEthernet 0/12 C.SW1#show port-secure interface FastEthernet 0/12 D.SW1#show running-config
A.dialer B.語(yǔ)音接口 C.serial口 D.子接口 E.CE1/PRI接口 F.虛擬接口模板 G.ISDNBRI接口 H.備份中心邏輯通道
A.Switches are primarily software based while bridges are hardware based. B.Both bridges and switches forward Layer 2 broadcasts. C.Bridges are frequently faster than switches. D.Switches have a higher number of ports than most bridges. E.Bridges define broadcast domains while switches define collision domains. F.Both bridges and switches make forwarding decisions based on Layer 2 addresses.