When print jobs remain stuck in the printer queue despite successful network communication (indicated by successful ping replies) and no issues with paper supply or toner levels, a common reason can be that the first job in the queue requires manual intervention, such as paper to be fed into a manual feed tray. Printers often pause the entire print queue if the first job requires a specific type of paper or manual insertion that hasn't been addressed, preventing subsequent jobs from processing.
Reference:
CompTIA A+ Core 1 (220-1101) Exam Objectives, specifically the sections on troubleshooting printers, which include understanding various reasons why print jobs might get stuck in the print queue.
Knowledge of printer operation and common print job issues, with an emphasis on how printers handle manual feed tray requirements and the impact on the print queue.