球度
The Outer.1Q tag represents customer VLAN ID and inner.1Q tag represents Provider VLAN？（） ["The Outer.1Q tag represents customer VLAN ID and inner.1Q tag represents Provider VLAN （PVLAN ）","It is an effective way to achieve VLAN transparency between Provider and enterprise customer bytunneling one ser of VLAN tags inside a second VLAN tag","The Outer.1Q tag represents Service VLAN （PVLAN） and inner.1Q tag represents customer VLAN","QinQ is a way to hide native VLAN which can conflict with Provider native VLAN"]
传感器通常由敏感元件和（）组成。 ["有源元件","无源元件","感应元件","转换元件"]
What are three basic parameters to configure on a wireless access point?（） ["SSID","RTS\/CTS","AES-CCMP","TKIP\/MIC","RF channel","authentication method"]
低压液化气体使用（）。 ["无缝气瓶","焊接气瓶","液化石油气钢瓶"]
NBAR is a Cisco IOS feature that can be used to perform three tasks？
