Final answer:
Viewing sexual content on a company computer is not permissible for IT professionals while on the job.
Step-by-step explanation:
Out of the activities listed, viewing sexual content on a company computer is not permissible for IT professionals while on the job.
Working on a side job while at work for one's primary job may not be allowed depending on the company's policies. Sending coworkers an e-mail joke containing suggestive humor may also be considered unprofessional and may violate workplace policies. Downloading music from a file-sharing service may not be appropriate if it is against company policies or if it violates copyright laws.
Learn more about Unpermissible activities for IT professionals on the job