Separating 2.4G and 5G WiFi network from each other in your router can give better performance and reliability in your network streaming systems.
From the factory if you have a dual band router it will switch automatically between these frequencies depending on what's best for the device your using. This function is convenient as the router shows you only one network while it is operating with two at the same time actually. However, such setting may not be the best option for overall network performance.
Separating 2.4G and 5G WiFi network will ensure that important UPnP messages that are sent among the Lightning devices, your music library and your wireless control point (such as an iPad) have a better chance of getting through the router.
When you separate the two networks, you will have two unique wireless names listed: one for 2.4G and one for 5G, such as 'AURALiC' and AURALiC_5G'. Both networks are connected to each other but using different radio frequency. You can set your device to use only one WiFi network and that device will not join the other one automatically.