Final answer:
Among the tasks listed, managing network security is generally not a responsibility of a help desk, as it is handled by specialized IT security personnel.
Step-by-step explanation:
A help desk can perform a wide range of tasks to assist users with technology-related issues. However, among the options provided, managing network security is generally not a task for a help desk team. While they do handle resolving technical issues, and can offer assistance in answering user queries and providing software training, network security management is typically handled by a specialized IT security team. This team is dedicated to protecting the organization's networks and systems from security breaches, which is a different focus from the user support services provided by a help desk.