Question 30
An acceptance check at Oakbridge University has two requirements: (1) avoid a user access port automatically forming an unintended trunk, and (2) distinguish tagged VLAN 30 traffic from untagged native VLAN traffic on an 802.1Q trunk. Select TWO actions that together satisfy both outcomes.
Explanation
Correct Answers
Correct for outcome (1): Access mode prevents the interface from carrying multiple data VLANs as a negotiated trunk. The other outcome needs its separate action.
Correct for outcome (2): The VLAN identifier in the 802.1Q header preserves VLAN separation across shared trunks. It complements the first required control.
Incorrect Answers
Not selected: Disable CDP on that specific interface is for avoid exposing Cisco discovery information on an untrusted edge link. Interface-level no cdp enable stops Cisco discovery advertisements on the selected port. This does not provide either of the two specified controls.
Not selected: Avoid BPDU filter on unmanaged switch-to-switch links is for explain why indiscriminate BPDU filtering risks a bridging loop. Suppressing BPDUs can hide redundant links from spanning-tree loop prevention. This is not one of the two required changes.
Not selected: Use show interfaces trunk is for confirm which VLANs are actively forwarded over a trunk. The command displays operational trunks, encapsulation/native VLAN and allowed/active VLANs. This is outside the two requested outcomes.