Aaahh! The old loopback Internet Protocol address, referred to as the localhost. It's used to establish an IP connection to the same machine or computer being used as an end-user!
Can't believe I didn't see that one!!
????????????????????????????????? Ignorance is bliss. @nomoredonuts . So happy you've explained the post by @Bishop_of_the_Glen . BUT I'm still none the wiser and long may it stay that way.