单选题A user has no network connectivity. A check of the associated port indicates that the interface is up， the line protocol is down. Which item would most likely cause this problem？（）ASpeed mismatchBIncorrect encapsulationCMTU set too lowDDuplex mismatch
单选题
A user has no network connectivity. A check of the associated port indicates that the interface is up， the line protocol is down. Which item would most likely cause this problem？（）
A
Speed mismatch
B
Incorrect encapsulation
C
MTU set too low
D
Duplex mismatch
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