掌握在交换机上建立VLAN，分配端口，创建TRUNK的方法，掌握针对VLAN 的常用查看和测试命令及使用计算机进行VLAN测试的方法。-Lies in the establishment of the switch VLAN, assign ports, create TRUNK way to master the common view for the VLAN and test command and the use of computer VLAN testing.