Which symptom most commonly indicates that two connecting interfaces are configured with a duplex mismatch?
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A. B. C. D.C
The correct answer is C. collisions on the interface.
A duplex mismatch occurs when two connected network devices are set to different duplex modes, such as one device being set to full-duplex and the other being set to half-duplex. This can cause a variety of problems, including poor network performance, connectivity issues, and other errors.
When a duplex mismatch occurs, the most common symptom is collisions on the interface. Collisions occur when two devices try to transmit data on the same network segment at the same time, which can result in lost data and other issues. When a duplex mismatch occurs, the device that is set to half-duplex mode will only listen to the network before transmitting, which can cause collisions when the other device transmits data.
An interface with a down/down status (option A) indicates that the interface is completely down and cannot be used for communication. This could be caused by a variety of factors, such as a physical cable being disconnected or a misconfiguration.
The spanning-tree process shutting down (option B) would indicate that there is a problem with the spanning-tree protocol, which is used to prevent network loops. This could be caused by a variety of factors, such as a misconfiguration or a network loop.
An interface with an up/down status (option D) indicates that the interface is up but cannot be used for communication. This could be caused by a variety of factors, such as a misconfiguration or a problem with the physical layer of the network.
In summary, the most common symptom of a duplex mismatch is collisions on the interface, which occurs when two devices try to transmit data on the same network segment at the same time.