"You will need to configure your wireless adaptor later in Linux but for now it is not necessary"
so NOOBS downloads operating systen using WIFI link to internet WITHOUT me having entered any WPA2 security code.
Nice feature! Makes life much easier at this stage.
But has left me concerned.
If authors of Pi's boot utilities can obtain wireless access through my internet gateway without any WPA2 security code, then presumably so can anyone else who can get their hands on the appropriate code. Something which villains seem to find easy to do.
When I set up the Pi for the first time it stuck on "NOOBS is Initialising". Google reveals that this happens if the Ethernet connection is via an internet switch, which was the case. So I placed a nano USB wireless adaptor (new and never previously used), then Noobs was no longer stuck, and offered me choice of downloads, then downloaded the OS with no further requirement for me to input information.