皮皮学，免费搜题
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搜题
【单选题】
听力原文：This is really a very sticky job for you to deal with on your own. SO if there's any trouble, just let me know and I can help you. (22)A.
Tell me if you want some help.
B.
Do you know where I can get help.
C.
I don't think I can assist you.
D.
Let me tell you what I know.
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】有位管理员排除交换机故障时,想核实它是不是根网桥。为此,可使用哪个命令?
A.
show vlan
B.
show spanning-tree
C.
show running-config
D.
show startup-config