Tell us about your practical cases of using Netcat utility.

Netcat is a versatile utility for working with network connections. In my practice, I used it for:

• Quickly testing open ports on a server.
• Debugging network services, for example, checking if a server responds on a specific port.
• Transferring files between machines over the network without setting up FTP or other services.
• Creating simple TCP servers or clients for testing.

Example: to check if a server is listening on port 80, I run:

nc -zv example.com 80

Netcat can also be used to quickly set up a simple chat or transfer data between two machines.