Wireless connectivity issues that are erratic and affect multiple users typically indicate an environmental or infrastructure-related problem, strongly pointing to interference from external sources or possibly an overloaded wireless access point (AP). A technician should first check for interference or saturation in the wireless channels being used, which could cause intermittent disconnections, by conducting a site survey to identify the presence of interference from other wireless networks or devices operating on the same channel. Issues specific to hardware or TCP/IP configuration would more likely produce consistent or isolated connectivity failures, rather than widespread and random ones. A firmware upgrade should only be considered if the issue is known to be resolved through such an update.