Layer 3 in the crypto world means more advanced stuff built on top of basic blockchain systems. It's like adding extra features and capabilities to make things work better.
Layer 3 helps send data across networks by figuring out the best route to take. It uses logical addresses and routing tables to decide where data should go.
In cryptography, Layer 3 often uses special security methods like IPsec to keep data safe when it's sent over networks.
Also, Layer 3 knows when to end connections after data has been sent or when they're not needed anymore. It helps tidy things up once the job is done.