Assuming interface FastEthernet 0/3 is up, which two commands would allow you to verify that the interface is set to trunk mode? (Choose two.)
- show interface trunk
- show interface FastEthernet0/3 switchport
- show vlan all
- show interface vlan
- show interface FastEthernet0/3
Explanation: To verify whether a specific interface like FastEthernet 0/3 is correctly operating in trunk mode, network administrators typically rely on two primary verification commands that provide different levels of detail. The show interfaces trunk command is an essential tool because it displays a concise summary of all interfaces currently functioning as trunks, explicitly showing their operational status, the encapsulation type (such as 802.1Q), the native VLAN, and the range of VLANs allowed to pass across the link. Alternatively, the show interface FastEthernet0/3 switchport command provides a more granular look at the Layer 2 configuration of that specific port, allowing a technician to distinguish between the "Administrative Mode" (the configured setting) and the "Operational Mode" (the actual current state). This is particularly important in environments using negotiation protocols like DTP, as it confirms that the port has successfully transitioned into trunking mode. While commands like show vlan can show which access ports are assigned to specific VLANs, they do not typically list trunk ports because trunks are not members of a single VLAN but rather carry traffic for many. Therefore, combining these two commands provides a definitive confirmation of the trunk's operational integrity and configuration.
Related exam: Modules 1 – 7: Checkpoint Exam: Network Switching Answers (CCNP ENCOR v9)
