NAT Simulator — Network Address Translation

Har Computer ka apna Private IP Address hota hai jo sirf LAN (local network) ke andar kaam karta hai — Internet par yeh IP route nahi ho sakta. Jab koi packet Internet ki taraf jata hai, Router/NAT Device us packet ka source address Private IP se badal kar apne aik hi Public IP mein tabdeel kar deta hai (aur ek internal table mein yeh mapping yaad rakh leta hai). Jab Internet se REPLY wapis aati hai, NAT apni table dekh kar Public IP ko wapis sahi Private IP mein translate kar ke theek usi computer tak pohanchata hai — chahay baqi computers bhi is waqt active hon.