A user is having trouble uploading files to a server. However, other users in the department are not experiencing this issue. The network administrator checks the access switch and sees multiple CRC errors on that user's switchport. Which of the following should the network administrator do first?
The presence of multiple CRC errors on a specific user's switchport typically points to issues related to the physical layer of the network. Since the problem is isolated to one user and other users are not experiencing issues, it is logical to start by replacing the user's network cable, which is the most common and simplest potential source of physical layer errors. This step addresses a likely source of the issue with minimal effort before considering more complex solutions.
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.