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A.Only use fiber in pairs.
B.Configure root guard on your switches.
C.Do not use fiber but use copper.
D.Configure UDLD to prevent one-way link conditions.
A.number of hops
B.priority of the bridge
C.interface bandwidth
D.interface delay
E.None of the above
Refer to the exhibit. Which switching feature is being tested?（）
A.loop guard
B.PortFast
C.root guard
D.BDPU guard
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When upgrading the IOS image,the network administrator receives the exhibited error message.What could be the cause of this error?（）
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