NAT in game (Assassin's Creed 3)

What is NAT? In Russian, say, be a patriot)

NAT)

Are you talking about this NAT?)

What connection?

I have green, you need a normal internet connection like)

Minimum System Requirements
OS: Windows Vista (SP2) / Windows 7 (SP1) / Windows 8
Processor: 2.66 GHz Intel Core2 Duo E6700 / 3.00 GHz AMD Athlon 64 X2 6000+ or ​​better
RAM: 2GB (4GB recommended)
Video Card: DirectX 9.0c , with Shader Model 4.0 support and 512MB of memory
Free hard disk space: 17GB
-> Internet connection speed: 256 kbps or faster

Well, most likely this one, but everything is in order with the Internet, the fiber optic is worth

Grog_King
I also had it in Black Flag, but at least the sessions were loading, half a year ago I decided to play again, and what was my surprise when I saw a green NAT.
I don't even know what it's about.