Sending a fax over a LAN requires an internet fax service, as traditional fax machines dial directly to fax numbers rather than using the internet. Users can utilize built-in fax software in Windows, but it typically requires a dial-up modem rather than a LAN connection. The importance of providing detailed information when seeking help is emphasized, as vague inquiries hinder effective troubleshooting. Clear communication about the operating system and specific attempts made can lead to better assistance. Understanding these points can help resolve fax issues more efficiently.