Hello, I have a blue and white g3 450mhz Mac running system 9.1. I am going to get DSL from my local phone company and they assure me it will work on my system but they told me I need to make sure I have a Network Interface Card (NIC). What is this? Is this my ethernet card? or is this just a PC thing that I should not be concerned about? Anyway, they told me that when the person gets to my house to hook up the modem/router and get me up and going that I need to make sure that I have a Network Interface Card or it won't work. Thanks for any help.