@Jcarnet
That is a dedicated/private network (normally hidden) for your Roku Voice remote and other pairing needs to communicate with the Roku device. (the network is created by the Roku device itself). Works in tandem with the "Device Connect" feature located under Settings/System/Advanced System Settings/Device Connect.
You cannot connect to it. Only authorized devices like the above will use and connect to it as needed. (internal Roku operations/usage/remote control functions)
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102