NAT & PAT Explained in 5 minutes
Learn the fundamentals of NAT (Network Address Translation) & PAT (Port Address Translation).
We'll understand how NAT & PAT enables several devices to share a single public IP address (thus saving IPv4 addresses) and how they help secure and handle efficient communication between private networks and the Internet.
00:00 Why do we need NAT?
00:25 What is NAT?
02:00 How does NAT work?
02:30 What is PAT?
03:20 Source NAT & Destination NAT
03:36 How does Destination NAT work?
04:45 Subscribe!
NAT allows internal machines with private IPs to communicate over the Internet using public IPs. It conserves IPv4 addresses by translating internal addresses to public ones.
PAT, or Port Address Translation, dynamically associates private IPs with unique port numbers for external communication. It enables multiple devices to share a single public IP address.