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在网络管理中，使用displayportvlan命令可查看交换机的( )信息，使用porntlink-typetrunk命令修改交换机( )。(1)A.ICMP报文处理方式B.接口状态C.VLAN和LinkTypeD.接口与IP对应关系(2)A.VLAN地址B.交换机接口状态C.接口类型D.对ICMP报文处理方式

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简述迈克尔逊干涉仪的组成及工作原理。

常见的红外光源主要有哪些？