What is the most likely cause when the output of the show interface command shows that a switch interface is up but the line protocol is down?

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What is the most likely cause when the output of the show interface command shows that a switch interface is up but the line protocol is down?

An encapsulation type mismatch exists.
An incorrect default gateway has been configured.
A cable is not attached to the interface.
An incorrect cable type has been attached to the interface.

Explanation: A status of interface up, line protocol down usually indicates a problem with encapsulation. Having no cable, or the incorrect cable, attached to an interface would result in a status where both the interface and line protocol would be down. An incorrect default gateway will affect network communications, but the interface will still be in the up state.

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