The computer 192.168.05 is attempting to access netbiosd on your computer

I am getting near constant pop ups from Norton with this message:::

The computer 192.168.05 is attempting to access netbiosd on your computer. Do you want to allow this connection? 

First, does anyone know how to identify the mysterious "computer 192.168.05'? What is netbiosd? And why does Norton keep doing this??? Norton please answer also. I'm paying for your services every month and it would be nice to get a response to this question and a solution. Thank you.