What is the effect of entering the switchport mode access configuration command on a switch?
- It enables BPDU guard on a specific port.
- It manually enables a trunk link.
- It disables an unused port.
- It disables DTP on a non-trunking interface.
Explanation: The switchport mode access command puts an interface into permanent nontrunking mode. By explicitly defining the port as an access port, it disables DTP (auto trunking) negotiations, which is a critical security measure to mitigate VLAN hopping attacks where a threat actor might try to spoof trunking signals to access unauthorized VLANs.
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