What is counted by the input errors show command?

The input errors show command provides a comprehensive count of various types of errors encountered when receiving frames on a network interface. This includes not only the total number of erroneous frames but also specific issues like frames that were discarded because of errors and frames that exceeded maximum transmission sizes.

By selecting the first option, one acknowledges that the command aggregates multiple error counters, giving network administrators a broad overview of the issues affecting the incoming data on a specific interface. Understanding this total is crucial for troubleshooting and diagnosing network problems, as it enables the identification of potential bottlenecks, configuration issues, or hardware malfunctions that may be impacting overall network performance.

The other options focus on specific types of errors, which are components of the total count rather than representing the entire picture. Thus, while they contribute to the understanding and investigation of issues, they don't encapsulate the full scope of what the input errors show command reports.