Hi i am in the same situation as you!
1. I studies and work in a network maintenance center (where we look after cellular sites and routers and such for a mobile telephone network). I think a NC for us best suited is 2281
2. I didn't know IELTS is better. I got accepted into school with TOEFL, but haven't applied for the visa yet. pending some papers this week to finish my documentation and apply. Do I need to show a notarized copy of the original or will a simple xerox suffice?
Thanks,
Sandra