Calalyst 3500在trunk模式下封装IEEE 802.IQ协议的命令是（）。
A．switch trunk encapsulation dot1 q
B．switch trunk encapsulation is1
C．switch trunk encapsulation negotiate
D．set trunk＜mbd/port＞on dot1 q
参考答案：A
解析：
Calayst 3500封装协议的命令格式switch truck eneapsulation＜协议类型＞。IEEE 802.1Q协议俗称“DotO0ne Q”(dot1 q) 。
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