#Network

With PAT, the router has only 1 IP address for all the devices.

It provides every connection from a local device to internet with a label called "virtual port" or "port".

Don't confuse virtual port (corresponds to an application) vs physical port (found on the switches)!

It's the most used translation system.

![[Pasted image 20240227094639.png]]

• 65536 ports are available for on IP.
• Ports are also used by applications.
• It's part of the TCP/UDP protocol which allows the creation of connections, while IP is only ONE way.