What information does an error log typically contain?

An error log typically contains error messages and diagnostic information that help system administrators troubleshoot issues with software or hardware. These logs record instances of failures, warnings, and other problems encountered by applications, systems, or services, providing insight into what went wrong during operation. By analyzing error messages in the log, administrators can identify root causes of issues, track recurring problems, and perform necessary fixes or optimizations.

The other options, while relevant in various contexts of system monitoring or security, do not align with the primary purpose of an error log. Successful request details pertain to normal operation logs rather than errors. Security breaches may be documented in security logs rather than general error logs. Performance metrics belong to performance monitoring tools and are not part of what an error log typically conveys. Hence, excluding non-related purposes, the error log's focus is specifically on capturing errors and diagnostic insights.