What is the effect of entering the shutdown configuration command on a switch?
- It enables BPDU guard on a specific port.
- It disables an unused port.
- It enables portfast on a specific switch interface.
- It disables DTP on a non-trunking interface.
Explanation: The shutdown interface configuration command is used to administratively disable a switch port, which prevents any traffic from being sent or received through that interface. Issuing this command on all unused ports is a fundamental security best practice to protect a network from unauthorized access by ensuring those physical entry points remain inactive until needed.
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