Exam N10-008 topic 1 question 842 discussion

CRC (Cyclic Redundancy Check) errors on a switchport indicate issues with the integrity of the data being transmitted. Since only one user is experiencing the issue and other users are not, it's likely that the problem is localized to the specific user's connection. Replacing the user's network cable is a good first step because a faulty or damaged cable can easily cause CRC errors. A. Replace the uplink cable for the access switch: This is less likely to be the cause because the problem is isolated to one user's switchport, not affecting other users. C. Replace the NIC for the user's PC: This could be a potential cause but is a more drastic step. It's better to start with simpler solutions, like checking or replacing the network cable, before replacing hardware components. D. Replace the access switch: This is not likely the cause since multiple users are not experiencing issues. It’s more efficient to troubleshoot the specific user's connection before considering replacing the entire switch.

Since the issue is isolated to that one user, and seeing as CRC errors are typically a problem on the physical layer, replacing their network cable would be the best option.