Which of the following scenarios would result in a duplex mismatch? (Choose two.)

A duplex mismatch occurs when two connected devices are configured to operate in different modes of duplex communication, leading to inefficient network performance and potential communication issues.

In the first scenario, where one device is using autonegotiation and the other is configured manually to full duplex, a mismatch can occur. The device with autonegotiation might not detect or properly align with the manual settings of the other device, potentially leading to one device operating in half-duplex mode while the other operates in full duplex.

The second scenario also leads to a duplex mismatch when two devices are manually configured to different duplex modes, for instance, one set to half duplex and the other to full duplex. This direct configuration error creates a scenario where one device expects to send and receive data simultaneously while the other doesn't, resulting in collisions and degraded performance.

Incorrect VLAN configurations would not create a duplex mismatch, as VLAN settings pertain to the segmentation of network traffic rather than the method of data transmission. Proper duplex settings must be observed to ensure effective communication, spotlighting the importance of matching configuration settings across connected network devices.