• Broadcast storm control is a feature of many managed switches (for example, Netgear M4300) in which the switch intentionally ceases to forward all broadcast traffic if the bandwidth consumed by incoming broadcast frames exceeds a designated threshold. This is something that can be disabled within the switch, as it can cause latency issues. 
• Realtime Internet Scanning feature in security software such as Sophos Endpoint appears to block the request for data, causing a webpage not to load fully, or fields not to populate