(Be able to configure Cisco's layer-3 switch so that hosts of different VLANs can communicate with each other. Understand the working principle of layer-3 switch. Be able to configure DHCP relay on Cisco's layer-3 switch. Simply understand the working principle of DHCP. Understand the principle that broadcasting can only spread inside VLANs. Be able to configure routing interfaces on Cisco's layer-3 switch so that switches and routers can be interconnected)
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