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

A duplex mismatch occurs when two connected network devices operate in different duplex modes (one in full-duplex and the other in half-duplex). The two scenarios that would result in a duplex mismatch are:

1. Manually setting the two connected devices to different duplex modes – If one device is set to full-duplex and the other to half-duplex manually, they will not be able to communicate properly, resulting in a duplex mismatch.
2. Connecting a device with autonegotiation to another that is manually set to full-duplex – If one end of a connection is configured to autonegotiate the duplex mode and the other end is manually set to full-duplex, the autonegotiation can fail, often causing the autonegotiating end to default to half-duplex, thus causing a duplex mismatch.

The other scenarios listed are not directly related to duplex mismatches:

• Connecting devices running at different speeds (100 Mbps to 1000 Mbps) can lead to performance issues but not a duplex mismatch.
• Starting and stopping a router interface during normal operation would not cause a duplex mismatch unless it led to one side changing its duplex settings.
• Configuring dynamic routing incorrectly does not affect duplex settings; it would cause routing issues instead.