Ubuntu online repository

Every so often it seems as though the Ubuntu online repository goes dark.It doesn’t matter which ubuntu version I’m using or which app I’m using. (synaptic, apt, or one of the software stores) No ability to update either. But then after a few days all is back to normal. It’s happened to me many times. Anybody know why?

Hey mate, you might wanna consider going into your software source settings and changing your update server.