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You issue the ‘Show CDP neighbor’ command on a Cisco switch but you are unable to see any information related to a non-cisco switch to which you are connected. What is the most likely reason for this?

CDP is a Cisco proprietary protocol and therefore cannot provide information for non Cisco hardware

CDP has not been enabled on the non Cisco switch

The physical link between the two devices is down

The interface between the two devices is disabled

Explanation

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